Java/Data Type/Date
Содержание
- 1 A formatter that formats dates to show the elapsed time relative to some base date.
- 2 Check if a String is a valid date
- 3 Collection of useful utilities to work with dates
- 4 Compare two Java Date objects using after method example
- 5 Compare two Java Date objects using before method example
- 6 Compare two Java Date objects using compareTo method example
- 7 Convert a String to Date
- 8 Convert Date into milliseconds example
- 9 Convert date string from one format to another format using SimpleDateFormat
- 10 Convert string of time to time object
- 11 Convert String to Date object
- 12 Create instance of java.sql.Date from Calendar.getTimeInMillis()
- 13 Create java Date from specific time example
- 14 Creating a Date Object for a Particular Date
- 15 Date utility class
- 16 Date Utils
- 17 Encapsulates a truck-load of commonly used date functions
- 18 Return now as a string
- 19 Return today as a string
- 20 Sets the day of month field to a date returning a new object.
- 21 Sets the hours field to a date returning a new object. Hours range from 0-23.
- 22 Sets the miliseconds field to a date returning a new object.
- 23 Sets the minute field to a date returning a new object.
- 24 Sets the seconds field to a date returning a new object.
- 25 Sets the years field to a date returning a new object.
- 26 Truncate this date(Calendar), leaving the field specified as the most significant field.
- 27 Truncate this date, leaving the field specified as the most significant field.
A formatter that formats dates to show the elapsed time relative to some base date.
<source lang="java">
/*
* JFreeChart : a free chart library for the Java(tm) platform * * * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors. * * Project Info: http://www.jfree.org/jfreechart/index.html * * This library is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 of the License, or * (at your option) any later version. * * This library is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public * License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, * USA. * * [Java is a trademark or registered trademark of Sun Microsystems, Inc. * in the United States and other countries.] * * ----------------------- * RelativeDateFormat.java * ----------------------- * (C) Copyright 2006-2008, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): Michael Siemer; * * Changes: * -------- * 01-Nov-2006 : Version 1 (DG); * 23-Nov-2006 : Added argument checks, updated equals(), added clone() and * hashCode() (DG); * 15-Feb-2008 : Applied patch 1873328 by Michael Siemer, with minor * modifications (DG); * 01-Sep-2008 : Added new fields for hour and minute formatting, based on * patch 2033092 (DG); * */
import java.text.DateFormat; import java.text.DecimalFormat; import java.text.FieldPosition; import java.text.NumberFormat; import java.text.ParsePosition; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; /**
* A formatter that formats dates to show the elapsed time relative to some * base date. * * @since 1.0.3 */
public class RelativeDateFormat extends DateFormat {
/** The base milliseconds for the elapsed time calculation. */
private long baseMillis;
/**
* A flag that controls whether or not a zero day count is displayed.
*/
private boolean showZeroDays;
/**
* A flag that controls whether or not a zero hour count is displayed.
*
* @since 1.0.10
*/
private boolean showZeroHours;
/**
* A formatter for the day count (most likely not critical until the
* day count exceeds 999).
*/
private NumberFormat dayFormatter;
/**
* A prefix prepended to the start of the format if the relative date is
* positive.
*
* @since 1.0.10
*/
private String positivePrefix;
/**
* A string appended after the day count.
*/
private String daySuffix;
/**
* A formatter for the hours.
*
* @since 1.0.11
*/
private NumberFormat hourFormatter;
/**
* A string appended after the hours.
*/
private String hourSuffix;
/**
* A formatter for the minutes.
*
* @since 1.0.11
*/
private NumberFormat minuteFormatter;
/**
* A string appended after the minutes.
*/
private String minuteSuffix;
/**
* A formatter for the seconds (and milliseconds).
*/
private NumberFormat secondFormatter;
/**
* A string appended after the seconds.
*/
private String secondSuffix;
/**
* A constant for the number of milliseconds in one hour.
*/
private static long MILLISECONDS_IN_ONE_HOUR = 60 * 60 * 1000L;
/**
* A constant for the number of milliseconds in one day.
*/
private static long MILLISECONDS_IN_ONE_DAY = 24 * MILLISECONDS_IN_ONE_HOUR;
/**
* Creates a new instance with base milliseconds set to zero.
*/
public RelativeDateFormat() {
this(0L);
}
/**
* Creates a new instance.
*
* @param time the date/time (null not permitted).
*/
public RelativeDateFormat(Date time) {
this(time.getTime());
}
/**
* Creates a new instance.
*
* @param baseMillis the time zone (null not permitted).
*/
public RelativeDateFormat(long baseMillis) {
super();
this.baseMillis = baseMillis;
this.showZeroDays = false;
this.showZeroHours = true;
this.positivePrefix = "";
this.dayFormatter = NumberFormat.getNumberInstance();
this.daySuffix = "d";
this.hourFormatter = NumberFormat.getNumberInstance();
this.hourSuffix = "h";
this.minuteFormatter = NumberFormat.getNumberInstance();
this.minuteSuffix = "m";
this.secondFormatter = NumberFormat.getNumberInstance();
this.secondFormatter.setMaximumFractionDigits(3);
this.secondFormatter.setMinimumFractionDigits(3);
this.secondSuffix = "s";
// we don"t use the calendar or numberFormat fields, but equals(Object)
// is failing without them being non-null
this.calendar = new GregorianCalendar();
this.numberFormat = new DecimalFormat("0");
}
/**
* Returns the base date/time used to calculate the elapsed time for
* display.
*
* @return The base date/time in milliseconds since 1-Jan-1970.
*
* @see #setBaseMillis(long)
*/
public long getBaseMillis() {
return this.baseMillis;
}
/**
* Sets the base date/time used to calculate the elapsed time for display.
* This should be specified in milliseconds using the same encoding as
* java.util.Date.
*
* @param baseMillis the base date/time in milliseconds.
*
* @see #getBaseMillis()
*/
public void setBaseMillis(long baseMillis) {
this.baseMillis = baseMillis;
}
/**
* Returns the flag that controls whether or not zero day counts are
* shown in the formatted output.
*
* @return The flag.
*
* @see #setShowZeroDays(boolean)
*/
public boolean getShowZeroDays() {
return this.showZeroDays;
}
/**
* Sets the flag that controls whether or not zero day counts are shown
* in the formatted output.
*
* @param show the flag.
*
* @see #getShowZeroDays()
*/
public void setShowZeroDays(boolean show) {
this.showZeroDays = show;
}
/**
* Returns the flag that controls whether or not zero hour counts are
* shown in the formatted output.
*
* @return The flag.
*
* @see #setShowZeroHours(boolean)
*
* @since 1.0.10
*/
public boolean getShowZeroHours() {
return this.showZeroHours;
}
/**
* Sets the flag that controls whether or not zero hour counts are shown
* in the formatted output.
*
* @param show the flag.
*
* @see #getShowZeroHours()
*
* @since 1.0.10
*/
public void setShowZeroHours(boolean show) {
this.showZeroHours = show;
}
/**
* Returns the string that is prepended to the format if the relative time
* is positive.
*
* @return The string (never null).
*
* @see #setPositivePrefix(String)
*
* @since 1.0.10
*/
public String getPositivePrefix() {
return this.positivePrefix;
}
/**
* Sets the string that is prepended to the format if the relative time is
* positive.
*
* @param prefix the prefix (null not permitted).
*
* @see #getPositivePrefix()
*
* @since 1.0.10
*/
public void setPositivePrefix(String prefix) {
if (prefix == null) {
throw new IllegalArgumentException("Null "prefix" argument.");
}
this.positivePrefix = prefix;
}
/**
* Sets the formatter for the days.
*
* @param formatter the formatter (null not permitted).
*
* @since 1.0.11
*/
public void setDayFormatter(NumberFormat formatter) {
if (formatter == null) {
throw new IllegalArgumentException("Null "formatter" argument.");
}
this.dayFormatter = formatter;
}
/**
* Returns the string that is appended to the day count.
*
* @return The string.
*
* @see #setDaySuffix(String)
*/
public String getDaySuffix() {
return this.daySuffix;
}
/**
* Sets the string that is appended to the day count.
*
* @param suffix the suffix (null not permitted).
*
* @see #getDaySuffix()
*/
public void setDaySuffix(String suffix) {
if (suffix == null) {
throw new IllegalArgumentException("Null "suffix" argument.");
}
this.daySuffix = suffix;
}
/**
* Sets the formatter for the hours.
*
* @param formatter the formatter (null not permitted).
*
* @since 1.0.11
*/
public void setHourFormatter(NumberFormat formatter) {
if (formatter == null) {
throw new IllegalArgumentException("Null "formatter" argument.");
}
this.hourFormatter = formatter;
}
/**
* Returns the string that is appended to the hour count.
*
* @return The string.
*
* @see #setHourSuffix(String)
*/
public String getHourSuffix() {
return this.hourSuffix;
}
/**
* Sets the string that is appended to the hour count.
*
* @param suffix the suffix (null not permitted).
*
* @see #getHourSuffix()
*/
public void setHourSuffix(String suffix) {
if (suffix == null) {
throw new IllegalArgumentException("Null "suffix" argument.");
}
this.hourSuffix = suffix;
}
/**
* Sets the formatter for the minutes.
*
* @param formatter the formatter (null not permitted).
*
* @since 1.0.11
*/
public void setMinuteFormatter(NumberFormat formatter) {
if (formatter == null) {
throw new IllegalArgumentException("Null "formatter" argument.");
}
this.minuteFormatter = formatter;
}
/**
* Returns the string that is appended to the minute count.
*
* @return The string.
*
* @see #setMinuteSuffix(String)
*/
public String getMinuteSuffix() {
return this.minuteSuffix;
}
/**
* Sets the string that is appended to the minute count.
*
* @param suffix the suffix (null not permitted).
*
* @see #getMinuteSuffix()
*/
public void setMinuteSuffix(String suffix) {
if (suffix == null) {
throw new IllegalArgumentException("Null "suffix" argument.");
}
this.minuteSuffix = suffix;
}
/**
* Returns the string that is appended to the second count.
*
* @return The string.
*
* @see #setSecondSuffix(String)
*/
public String getSecondSuffix() {
return this.secondSuffix;
}
/**
* Sets the string that is appended to the second count.
*
* @param suffix the suffix (null not permitted).
*
* @see #getSecondSuffix()
*/
public void setSecondSuffix(String suffix) {
if (suffix == null) {
throw new IllegalArgumentException("Null "suffix" argument.");
}
this.secondSuffix = suffix;
}
/**
* Sets the formatter for the seconds and milliseconds.
*
* @param formatter the formatter (null not permitted).
*/
public void setSecondFormatter(NumberFormat formatter) {
if (formatter == null) {
throw new IllegalArgumentException("Null "formatter" argument.");
}
this.secondFormatter = formatter;
}
/**
* Formats the given date as the amount of elapsed time (relative to the
* base date specified in the constructor).
*
* @param date the date.
* @param toAppendTo the string buffer.
* @param fieldPosition the field position.
*
* @return The formatted date.
*/
public StringBuffer format(Date date, StringBuffer toAppendTo,
FieldPosition fieldPosition) {
long currentMillis = date.getTime();
long elapsed = currentMillis - this.baseMillis;
String signPrefix;
if (elapsed < 0) {
elapsed *= -1L;
signPrefix = "-";
}
else {
signPrefix = this.positivePrefix;
}
long days = elapsed / MILLISECONDS_IN_ONE_DAY;
elapsed = elapsed - (days * MILLISECONDS_IN_ONE_DAY);
long hours = elapsed / MILLISECONDS_IN_ONE_HOUR;
elapsed = elapsed - (hours * MILLISECONDS_IN_ONE_HOUR);
long minutes = elapsed / 60000L;
elapsed = elapsed - (minutes * 60000L);
double seconds = elapsed / 1000.0;
toAppendTo.append(signPrefix);
if (days != 0 || this.showZeroDays) {
toAppendTo.append(this.dayFormatter.format(days) + getDaySuffix());
}
if (hours != 0 || this.showZeroHours) {
toAppendTo.append(this.hourFormatter.format(hours)
+ getHourSuffix());
}
toAppendTo.append(this.minuteFormatter.format(minutes)
+ getMinuteSuffix());
toAppendTo.append(this.secondFormatter.format(seconds)
+ getSecondSuffix());
return toAppendTo;
}
/**
* Parses the given string (not implemented).
*
* @param source the date string.
* @param pos the parse position.
*
* @return null, as this method has not been implemented.
*/
public Date parse(String source, ParsePosition pos) {
return null;
}
/**
* Tests this formatter for equality with an arbitrary object.
*
* @param obj the object (null permitted).
*
* @return A boolean.
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof RelativeDateFormat)) {
return false;
}
if (!super.equals(obj)) {
return false;
}
RelativeDateFormat that = (RelativeDateFormat) obj;
if (this.baseMillis != that.baseMillis) {
return false;
}
if (this.showZeroDays != that.showZeroDays) {
return false;
}
if (this.showZeroHours != that.showZeroHours) {
return false;
}
if (!this.positivePrefix.equals(that.positivePrefix)) {
return false;
}
if (!this.daySuffix.equals(that.daySuffix)) {
return false;
}
if (!this.hourSuffix.equals(that.hourSuffix)) {
return false;
}
if (!this.minuteSuffix.equals(that.minuteSuffix)) {
return false;
}
if (!this.secondSuffix.equals(that.secondSuffix)) {
return false;
}
if (!this.dayFormatter.equals(that.dayFormatter)) {
return false;
}
if (!this.hourFormatter.equals(that.hourFormatter)) {
return false;
}
if (!this.minuteFormatter.equals(that.minuteFormatter)) {
return false;
}
if (!this.secondFormatter.equals(that.secondFormatter)) {
return false;
}
return true;
}
/**
* Returns a hash code for this instance.
*
* @return A hash code.
*/
public int hashCode() {
int result = 193;
result = 37 * result
+ (int) (this.baseMillis ^ (this.baseMillis >>> 32));
result = 37 * result + this.positivePrefix.hashCode();
result = 37 * result + this.daySuffix.hashCode();
result = 37 * result + this.hourSuffix.hashCode();
result = 37 * result + this.minuteSuffix.hashCode();
result = 37 * result + this.secondSuffix.hashCode();
result = 37 * result + this.secondFormatter.hashCode();
return result;
}
/**
* Returns a clone of this instance.
*
* @return A clone.
*/
public Object clone() {
RelativeDateFormat clone = (RelativeDateFormat) super.clone();
clone.dayFormatter = (NumberFormat) this.dayFormatter.clone();
clone.secondFormatter = (NumberFormat) this.secondFormatter.clone();
return clone;
}
/**
* Some test code.
*
* @param args ignored.
*/
public static void main(String[] args) {
GregorianCalendar c0 = new GregorianCalendar(2006, 10, 1, 0, 0, 0);
GregorianCalendar c1 = new GregorianCalendar(2006, 10, 1, 11, 37, 43);
c1.set(Calendar.MILLISECOND, 123);
System.out.println("Default: ");
RelativeDateFormat rdf = new RelativeDateFormat(c0.getTime().getTime());
System.out.println(rdf.format(c1.getTime()));
System.out.println();
System.out.println("Hide milliseconds: ");
rdf.setSecondFormatter(new DecimalFormat("0"));
System.out.println(rdf.format(c1.getTime()));
System.out.println();
System.out.println("Show zero day output: ");
rdf.setShowZeroDays(true);
System.out.println(rdf.format(c1.getTime()));
System.out.println();
System.out.println("Alternative suffixes: ");
rdf.setShowZeroDays(false);
rdf.setDaySuffix(":");
rdf.setHourSuffix(":");
rdf.setMinuteSuffix(":");
rdf.setSecondSuffix("");
System.out.println(rdf.format(c1.getTime()));
System.out.println();
}
}
</source>
Check if a String is a valid date
<source lang="java">
import java.text.ParseException; import java.text.SimpleDateFormat; public class Main {
public static boolean isValidDate(String inDate) {
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
dateFormat.setLenient(false);
try {
dateFormat.parse(inDate.trim());
} catch (ParseException pe) {
return false;
}
return true;
}
public static void main(String[] args) {
System.out.println(isValidDate("2004-02-29"));
System.out.println(isValidDate("2005-02-29"));
}
} /* true false
- /
</source>
Collection of useful utilities to work with dates
<source lang="java">
/*
* Copyright (c) 2003 - 2007 OpenSubsystems s.r.o. Slovak Republic. All rights reserved. * * Project: OpenSubsystems * * $Id: DateUtils.java,v 1.7 2007/01/07 06:14:00 bastafidli Exp $ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
import java.sql.Timestamp; import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar;
/**
* Collection of useful utilities to work with dates. * * @version $Id: DateUtils.java,v 1.7 2007/01/07 06:14:00 bastafidli Exp $ * @author Miro Halas * @code.reviewer Miro Halas * @code.reviewed 1.5 2005/09/13 13:23:15 bastafidli */
public final class DateUtils {
// Constants //////////////////////////////////////////////////////////////// /** * One second in milliseconds. */ public static final long ONE_SECOND = 1000L; /** * One minute in milliseconds. */ public static final long ONE_MINUTE = ONE_SECOND * 60L; /** * One hour in milliseconds. */ public static final long ONE_HOUR = ONE_MINUTE * 60L; /** * One day in milliseconds. */ public static final long ONE_DAY = ONE_HOUR * 24L; /** * Separator we used to separate time from the nanosecond portion of the * timestamp when converted to string. */ public static final char NANO_SEPARATOR = ":"; /** * Constant for timing type */ public static final int TIMING_NEVER = 0; /** * Constant for timing type */ public static final int TIMING_MINUTES = 1; /** * Constant for timing type */ public static final int TIMING_HOURS = 2; /** * Constant for timing type */ public static final int TIMING_DAYS = 3; /** * Constant for timing type */ public static final int TIMING_WEEKS = 4; /** * Constant for timing type */ public static final int TIMING_MONTHS = 5; /** * Constant for timing type */ public static final int TIMING_YEARS = 6; /** * Constant for timing type */ public static final int TIMING_NONE = 7; /** * Constant for current date code used in date/time formulas */ public static final String CURRENT_DATE_CODE = "now"; /** * Constant for dynamic date code used in date/time formulas */ public static final char YEAR_CODE = "y"; /** * Constant for dynamic date code used in date/time formulas */ public static final char MONTH_CODE = "M"; /** * Constant for dynamic date code used in date/time formulas */ public static final char WEEK_CODE = "w"; /** * Constant for dynamic date code used in date/time formulas */ public static final char DAY_CODE = "d"; /** * Constant for dynamic date code used in date/time formulas */ public static final char HOUR_CODE = "h"; /** * Constant for dynamic date code used in date/time formulas */ public static final char MINUTE_CODE = "m"; /** * Constant for dynamic date code used in date/time formulas */ public static final char SECOND_CODE = "s"; /** * constant for date type DATE */ public static final int DATE_TYPE_DATE = 1; /** * constant for date type TIME */ public static final int DATE_TYPE_TIME = 2; /** * constant for date type DATETIME */ public static final int DATE_TYPE_DATETIME = 3; // Constants for period start types /////////////////////////////////////////
// TODO: For Miro: Remove this code once all the code which referred to these // constants was fixed // /** // * constant for period type // */ // public static final int PERIOD_START_TYPE_NONE = 0; // // /** // * constant for period type // */ // public static final int PERIOD_START_TYPE_CREATION = 1; // // /** // * constant for period type // */ // public static final int PERIOD_START_TYPE_COMPLETION = 2; // // /** // * constant for period type // */ // public static final int PERIOD_START_TYPE_APPROVAL = 3; // // /** // * constant for period type // */ // public static final int PERIOD_START_TYPE_ACTIVATION = 4; // // /** // * constant for period type // */ // public static final int PERIOD_START_TYPE_INACTIVATION = 5; // // /** // * constant for period type // */ // public static final int PERIOD_START_TYPE_DYNAMIC = 6; // // /** // * constant for period type code // */ // public static final int PERIOD_TYPE_CODE = 99; // // /** // * constant for period type object // */ // public static final Integer PERIOD_TYPE_OBJ = new Integer(PERIOD_TYPE_CODE);
// Cached variables /////////////////////////////////////////////////////////
/**
* static SimpleDateFormat for date format to display on UI and in messages.
*/
public static final SimpleDateFormat DATE_FORMAT
= (SimpleDateFormat) DateFormat.getDateInstance(DateFormat.SHORT);
/**
* static SimpleDateFormat for time format to display on UI and in messages.
*/
public static final SimpleDateFormat TIME_FORMAT
= (SimpleDateFormat) DateFormat.getTimeInstance(DateFormat.MEDIUM);
/**
* static SimpleDateFormat for datetime format to display on UI and in messages.
*/
public static final SimpleDateFormat DATETIME_FORMAT
= (SimpleDateFormat) DateFormat.getDateTimeInstance(DateFormat.SHORT,
DateFormat.MEDIUM);
/**
* static SimpleDateFormat for date format to store date as string so that
* it is stored consistently.
*/
public static final SimpleDateFormat DATE_STORE_FORMAT
= new SimpleDateFormat("MM/dd/yyyy");
/**
* static SimpleDateFormat for time format to store time as string so that
* it is stored consistently.
*/
public static final SimpleDateFormat TIME_STORE_FORMAT
= new SimpleDateFormat("HH:mm:ss");
/**
* static SimpleDateFormat for datetime format to store date and time as
* string so that it is stored consistently.
*/
public static final SimpleDateFormat DATETIME_STORE_FORMAT
= new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
/**
* static SimpleDateFormat for date format for sql date
*/
public static final SimpleDateFormat DATE_SQL_FORMAT
= new SimpleDateFormat("yyyy-MM-dd 00:00:00");
/**
* static SimpleDateFormat for time format for sql time
*/
public static final SimpleDateFormat TIME_SQL_FORMAT
= new SimpleDateFormat("1970-01-01 HH:mm:ss");
/**
* static SimpleDateFormat for datetime format for sql date and time
*/
public static final SimpleDateFormat DATETIME_SQL_FORMAT
= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
// Constructors /////////////////////////////////////////////////////////////
/**
* Private constructor since this class cannot be instantiated
*/
private DateUtils(
)
{
// Do nothing
}
// Public methods ///////////////////////////////////////////////////////////
/**
* Check if two dates equals regardless of the time. Two null dates are equal.
* Null and not null dates are not equal.
*
* @param dtFirst - first date to compare, can be null
* @param dtSecond - second date to compare, can be null
* @return boolean - true if two dates equals regardless of what the time is
*/
public static boolean dateEquals(
Date dtFirst,
Date dtSecond
)
{
boolean bReturn = false;
// If they are the same object, they are equals
bReturn = (dtFirst == dtSecond);
if (!bReturn)
{
if (dtFirst == null)
{
// Two null dates are the same
bReturn = (dtSecond == null);
}
else
{
if (dtSecond != null)
{
Calendar compCalendar;
int iEra;
int iYear;
int iMonth;
int iDay;
compCalendar = Calendar.getInstance();
compCalendar.setTime(dtFirst);
iEra = compCalendar.get(Calendar.ERA);
iYear = compCalendar.get(Calendar.YEAR);
iMonth = compCalendar.get(Calendar.MONTH);
iDay = compCalendar.get(Calendar.DATE);
compCalendar.setTime(dtSecond);
bReturn = ((iEra == compCalendar.get(Calendar.ERA))
&& (iYear == compCalendar.get(Calendar.YEAR))
&& (iMonth == compCalendar.get(Calendar.MONTH))
&& (iDay == compCalendar.get(Calendar.DATE)));
}
}
}
return bReturn;
}
/**
* Check if two times equals regardless of the date. Two null times are equal.
* Null and not null times are not equal.
*
* @param dtFirst - first time to compare, can be null
* @param dtSecond - second time to compare, can be null
* @param bIgnoreMilliseconds - if true milliseconds will be ignored in comparison
* @return boolean - true if two time equals regardless of what the date is
*/
public static boolean timeEquals(
Date dtFirst,
Date dtSecond,
boolean bIgnoreMilliseconds
)
{
boolean bReturn = false;
// If they are the same object, they are equals
bReturn = (dtFirst == dtSecond);
if (!bReturn)
{
if (dtFirst == null)
{
// Two null dates are the same
bReturn = (dtSecond == null);
}
else
{
if (dtSecond != null)
{
Calendar compCalendar;
int iHour;
int iMinute;
int iSecond;
int iMili;
compCalendar = Calendar.getInstance();
compCalendar.setTime(dtFirst);
iHour = compCalendar.get(Calendar.HOUR_OF_DAY);
iMinute = compCalendar.get(Calendar.MINUTE);
iSecond = compCalendar.get(Calendar.SECOND);
iMili = compCalendar.get(Calendar.MILLISECOND);
compCalendar.setTime(dtSecond);
bReturn = ((iHour == compCalendar.get(Calendar.HOUR_OF_DAY))
&& (iMinute == compCalendar.get(Calendar.MINUTE))
&& (iSecond == compCalendar.get(Calendar.SECOND))
&& ((bIgnoreMilliseconds)
|| (iMili == compCalendar.get(Calendar.MILLISECOND))));
}
}
}
return bReturn;
}
/**
* Check if two dates and times are equal. Two null dates are equal. Null
* and not null dates are not equal.
*
* @param dtFirst - first date time to compare, can be null
* @param dtSecond - second date time to compare, can be null
* @return boolean - true if two date and times are equal
*/
public static boolean dateAndTimeEquals(
Date dtFirst,
Date dtSecond
)
{
boolean bReturn = false;
// If they are the same object, they are equals
bReturn = (dtFirst == dtSecond);
if (!bReturn)
{
if (dtFirst == null)
{
// Two null dates are the same
bReturn = (dtSecond == null);
}
else
{
if (dtSecond != null)
{
// They are both not null so they have to match to millisecond
// (actually to nanosecond since the getTime takes nanoseconds
// into account)
bReturn = (dtFirst.getTime() == dtSecond.getTime());
}
}
}
return bReturn;
}
/**
* Check if String representing date is function or date. Date is a function
* (formula) if it starts with the current date/time variable which can be
* followed by expression describing period from current date.
*
* @param strValue - string representation of date or date function
* @return boolean - date function flag
*/
public static boolean isFunction(
String strValue
)
{
boolean bReturn = false;
if ((strValue != null) && (strValue.length() > 0)
&& (strValue.trim().startsWith(CURRENT_DATE_CODE)))
{
bReturn = true;
}
return bReturn;
}
/**
* Parse date time value from given string resolving any functions or formulas
* the string can contain. This method can be therefore used if the passed
* string contains string representation date, time or timestamp or a formula
* such as now + 3h - 1m + 4d.
*
* @param strValue - string representation of date or date function
* @param iDateType - date type code, one of the DATE_TYPE_XXX constants
* @param stored - flag if Date should be parsed using format used for
* storage or for display
* @return Timestamp - parsed date or null if date was null
* @throws OSSInvalidDataException - error during parsing
*/
public static Timestamp parseDateTime(
String strValue,
int iDateType,
boolean stored
) throws Exception
{
Timestamp tsReturn = null;
Calendar workCal = GregorianCalendar.getInstance();
if (strValue != null && strValue.length() > 0)
{
strValue = strValue.trim();
if (strValue.startsWith(CURRENT_DATE_CODE))
{
strValue = strValue.replaceAll("[ ]", "");
// If the user specified "UseCurrent", then substitute the
// current date/time in the value
workCal.setTime(new Date());
// Log.getInstance().debug("Parsing current date " + strValue);
// Parse the date math
int iBeginIndex = CURRENT_DATE_CODE.length();
int iMaxLength = strValue.length();
int iSign = 1;
int iNumberIndex;
int iValue;
char cChar = " ";
while (iBeginIndex < iMaxLength)
{
// This has to be sign
if (strValue.charAt(iBeginIndex) == "+")
{
iSign = 1;
}
else if (strValue.charAt(iBeginIndex) == "-")
{
iSign = -1;
}
else
{
// Incorrect String
throw new Exception(
"Date function is in incorrect format: "
+ strValue + " at " + strValue.substring(iBeginIndex));
}
iBeginIndex++;
// Now we have to have number
iNumberIndex = iBeginIndex;
while (((iBeginIndex == iNumberIndex) || Character.isDigit(cChar))
&& (iBeginIndex < iMaxLength))
{
cChar = strValue.charAt(iBeginIndex++);
}
// We have to go one back because we should stop on modifier (e.g 1m)
iBeginIndex--;
try
{
iValue = Integer.parseInt(strValue.substring(iNumberIndex, iBeginIndex));
}
catch (NumberFormatException nmeExc)
{
// Incorrect String
throw new Exception(
"Date function is in incorrect format: "
+ strValue + " at " + strValue.substring(iNumberIndex));
}
// This has to be modifier: y - year, M - month, w - week,
// d - day, h - hour, m - minute, s - second
cChar = strValue.charAt(iBeginIndex);
switch(cChar)
{
case(YEAR_CODE):
{
if (iDateType == DATE_TYPE_TIME)
{
throw new Exception(
"Date function is in incorrect format: " +
"used YEAR modifier for TIME type");
}
workCal.add(Calendar.YEAR, iSign * iValue);
break;
}
case(MONTH_CODE):
{
if (iDateType == DATE_TYPE_TIME)
{
throw new Exception(
"Date function is in incorrect format: " +
"used MONTH modifier for TIME type");
}
workCal.add(Calendar.MONTH, iSign * iValue);
break;
}
case(WEEK_CODE):
{
if (iDateType == DATE_TYPE_TIME)
{
throw new Exception(
"Date function is in incorrect format: " +
"used WEEK modifier for TIME type");
}
workCal.add(Calendar.WEEK_OF_YEAR, iSign * iValue);
break;
}
case(DAY_CODE):
{
if (iDateType == DATE_TYPE_TIME)
{
throw new Exception(
"Date function is in incorrect format: " +
"used DAY modifier for TIME type");
}
workCal.add(Calendar.DATE, iSign * iValue);
break;
}
case(HOUR_CODE):
{
if (iDateType == DATE_TYPE_DATE)
{
throw new Exception(
"Date function is in incorrect format: " +
"used HOUR modifier for DATE type");
}
workCal.add(Calendar.HOUR, iSign * iValue);
break;
}
case(MINUTE_CODE):
{
if (iDateType == DATE_TYPE_DATE)
{
throw new Exception(
"Date function is in incorrect format: " +
"used MINUTE modifier for DATE type");
}
workCal.add(Calendar.MINUTE, iSign * iValue);
break;
}
case(SECOND_CODE):
{
if (iDateType == DATE_TYPE_DATE)
{
throw new Exception(
"Date function is in incorrect format: " +
"used SECOND modifier for DATE type");
}
workCal.add(Calendar.SECOND, iSign * iValue);
break;
}
default:
{
// Incorrect String
throw new Exception(
"Date function is in incorrect format: "
+ strValue + " at " + strValue.substring(iBeginIndex));
}
}
iBeginIndex++;
}
tsReturn = new Timestamp(workCal.getTimeInMillis());
}
else
{
try
{
if (stored)
{
switch (iDateType)
{
case (DATE_TYPE_DATE) :
{
tsReturn = new Timestamp(DATE_STORE_FORMAT.parse(strValue).getTime());
break;
}
case (DATE_TYPE_TIME) :
{
tsReturn = new Timestamp(TIME_STORE_FORMAT.parse(strValue).getTime());
break;
}
case (DATE_TYPE_DATETIME) :
{
tsReturn = new Timestamp(DATETIME_STORE_FORMAT.parse(strValue).getTime());
break;
}
default:
{
assert false : "Unknown date type " + iDateType;
}
}
}
else
{
switch (iDateType)
{
case (DATE_TYPE_DATE) :
{
tsReturn = new Timestamp(DATE_FORMAT.parse(strValue).getTime());
break;
}
case (DATE_TYPE_TIME) :
{
tsReturn = new Timestamp(TIME_FORMAT.parse(strValue).getTime());
break;
}
case (DATE_TYPE_DATETIME) :
{
tsReturn = new Timestamp(DATETIME_FORMAT.parse(strValue).getTime());
break;
}
default:
{
assert false : "Unknown date type " + iDateType;
}
}
}
}
catch (ParseException peExc)
{
throw new Exception(
"Date is in incorrect format. Problems with parsing.",
peExc);
}
}
}
return tsReturn;
}
/**
* Parse the specified period into string displaying number of days the
* period represents.
*
* @param lPeriod - period in miliseconds
* @return String - period in format "x day(s)" or "" if not valid period
*/
public static String parseDayPeriod(
long lPeriod
)
{
StringBuffer sbReturn = new StringBuffer();
long lDays = 0L;
if (lPeriod > 0)
{
// we will count each started day as counted day
lPeriod = lPeriod + DateUtils.ONE_DAY - 1;
lDays = lPeriod / DateUtils.ONE_DAY;
sbReturn.append(lDays);
if (lDays == 1L)
{
sbReturn.append(" day");
}
else
{
sbReturn.append(" days");
}
}
else
{
sbReturn.append("0 days");
}
return sbReturn.toString();
}
/**
* Parse the specified period into string displaying date and time the
* period represents.
*
* @param lPeriod - preiod in miliseconds
* @return String - period in format "x day(s) y hour(s) z minute(s)"
* or "" if not valid period
*/
public static String parseDayTimePeriod(
long lPeriod
)
{
StringBuffer sbReturn = new StringBuffer();
long lHelp = 0L;
if (lPeriod > 0)
{
lPeriod = lPeriod + DateUtils.ONE_MINUTE - 1;
// we will count each started day as counted day
lHelp = lPeriod / DateUtils.ONE_DAY;
if (lHelp > 0)
{
sbReturn.append(lHelp);
if (lHelp == 1L)
{
sbReturn.append(" d ");
}
else
{
sbReturn.append(" d ");
}
}
lPeriod = lPeriod % DateUtils.ONE_DAY;
lHelp = lPeriod / DateUtils.ONE_HOUR;
if (lHelp > 0 || sbReturn.length() > 0)
{
sbReturn.append(lHelp);
if (lHelp == 1L)
{
sbReturn.append(" h ");
}
else
{
sbReturn.append(" h ");
}
}
lPeriod = lPeriod % DateUtils.ONE_HOUR;
lHelp = lPeriod / DateUtils.ONE_MINUTE;
if (lHelp > 0 || sbReturn.length() > 0)
{
sbReturn.append(lHelp);
if (lHelp == 1L)
{
sbReturn.append(" min");
}
else
{
sbReturn.append(" min");
}
}
}
else
{
sbReturn.append("0 min");
}
return sbReturn.toString();
}
// TODO: For Miro: Remove this code once all the code which referred to these // was fixed. These should be moved to a GUI related class. // /** // * Method for list of timing types. // * // * @return List - list of timing types // */ // public static List getTimingTypes( // ) // { // List lstTimingTypes = new ArrayList(); // // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_MINUTES), // "Minute(s)")); // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_HOURS), "Hour(s)")); // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_DAYS), "Day(s)")); // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_WEEKS), "Week(s)")); // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_MONTHS), "Month(s)")); // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_YEARS), "Year(s)")); // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_NEVER), "Never")); // // return lstTimingTypes; // } // /** // * Method for list of timing types with None option. // * // * @return List - list of timing types // */ // public static List getTimingTypesWithNone( // ) // { // List lstTimingTypes = new ArrayList(); // // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_NONE), "None")); // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_MINUTES), // "Minute(s)")); // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_HOURS), "Hour(s)")); // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_DAYS), "Day(s)")); // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_WEEKS), "Week(s)")); // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_MONTHS), "Month(s)")); // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_YEARS), "Year(s)")); // lstTimingTypes.add(new SelectOption(Integer.toString(DateUtils.TIMING_NEVER), "Never")); // // return lstTimingTypes; // } // /** // * Method for getting string name of the timing type. // * // * @param iTimingType - timing type constant // * @return String - string name of timing type // */ // public static String getTimingTypeName( // int iTimingType // ) // { // String outTimingTypeName = "Never"; // switch (iTimingType) // { // case (DateUtils.TIMING_NEVER): // { // outTimingTypeName = "Never"; // break; // } // case (DateUtils.TIMING_MINUTES): // { // outTimingTypeName = "Minute(s)"; // break; // } // case (DateUtils.TIMING_HOURS): // { // outTimingTypeName = "Hour(s)"; // break; // } // case (DateUtils.TIMING_DAYS): // { // outTimingTypeName = "Day(s)"; // break; // } // case (DateUtils.TIMING_WEEKS): // { // outTimingTypeName = "Week(s)"; // break; // } // case (DateUtils.TIMING_MONTHS): // { // outTimingTypeName = "Month(s)"; // break; // } // case (DateUtils.TIMING_YEARS): // { // outTimingTypeName = "Year(s)"; // break; // } // case (DateUtils.TIMING_NONE): // { // outTimingTypeName = "None"; // break; // } // } // // return outTimingTypeName; // }
/**
* Get expiration timestamp from start date, period type and duration. For
* example if the start date is now, period type is hour and duration is 2
* then the result will be timestamp representing now + 2 hours.
*
* @param tsStartDate - start date of period counting
* @param iPeriodType - one of the period type constant TIMING_XXX
* @param iPeriodDuration - period duration, number of time units specified
* by period type
* @return Timestamp - date of period expiration or null if any problem
*/
public static Timestamp getPeriodExpiration(
Timestamp tsStartDate,
int iPeriodType,
int iPeriodDuration
)
{
Timestamp tsReturn = null;
Calendar calHelp;
if (tsStartDate != null && iPeriodDuration > 0
&& iPeriodType > TIMING_NEVER && iPeriodType < TIMING_NONE)
{
calHelp = Calendar.getInstance();
calHelp.setTime(tsStartDate);
switch (iPeriodType)
{
case (TIMING_MINUTES) :
{
calHelp.add(Calendar.MINUTE, iPeriodDuration);
break;
}
case (TIMING_HOURS) :
{
calHelp.add(Calendar.HOUR, iPeriodDuration);
break;
}
case (TIMING_DAYS) :
{
calHelp.add(Calendar.DATE, iPeriodDuration);
break;
}
case (TIMING_WEEKS) :
{
calHelp.add(Calendar.WEEK_OF_YEAR, iPeriodDuration);
break;
}
case (TIMING_MONTHS) :
{
calHelp.add(Calendar.MONTH, iPeriodDuration);
break;
}
case (TIMING_YEARS) :
{
calHelp.add(Calendar.YEAR, iPeriodDuration);
break;
}
default :
{
assert false : "Not supported Timing type " + iPeriodType;
}
}
tsReturn = new Timestamp(calHelp.getTimeInMillis());
}
return tsReturn;
}
/**
* Method to compare time periods
*
* @param iPeriodType1 - first period type, one of the period type constant
* TIMING_XXX
* @param iPeriodDuration1 - first period duration
* @param iPeriodType2 - second period type, one of the period type constant
* TIMING_XXX
* @param iPeriodDuration2 - second period duration
* @return int - 1 - first period is longer
* 0 - periods are same
* -1 - first period is shorter
*/
public static int comparePeriods(
int iPeriodType1,
int iPeriodDuration1,
int iPeriodType2,
int iPeriodDuration2
)
{
int iReturn = 0;
if ((iPeriodType1 != TIMING_NEVER) && (iPeriodType1 != TIMING_NONE)
&& (iPeriodType2 != TIMING_NEVER) && (iPeriodType2 != TIMING_NONE))
{
Timestamp tsTimestamp1 = getPeriodExpiration(
new Timestamp(0), iPeriodType1, iPeriodDuration1);
Timestamp tsTimestamp2 = getPeriodExpiration(
new Timestamp(0), iPeriodType2, iPeriodDuration2);
// TODO: Improve: When would any of these be null?
if ((tsTimestamp1 != null) && (tsTimestamp2 != null))
{
if (tsTimestamp1.after(tsTimestamp2))
{
iReturn = 1;
}
else if (tsTimestamp2.after(tsTimestamp1))
{
iReturn = -1;
}
}
}
else
{
if (iPeriodType1 != iPeriodType2)
{
if (iPeriodType1 == TIMING_NEVER)
{
iReturn = 1;
}
else if (iPeriodType1 == TIMING_NONE)
{
iReturn = -1;
}
else if (iPeriodType2 == TIMING_NEVER)
{
iReturn = -1;
}
else if (iPeriodType2 == TIMING_NONE)
{
iReturn = 1;
}
}
}
return iReturn;
}
/**
* Convert timestamp to string including it"s nanosecond portion so that it
* can be safely stored in variable of web page.
*
* @param tsTimestamp - timestamp to convert
* @return String - text containing time and nanosecond portion of timestamp
*/
public static String getTimestampAsString(
Timestamp tsTimestamp
)
{
StringBuffer sbTimestamp = new StringBuffer();
sbTimestamp.append(tsTimestamp.getTime());
sbTimestamp.append(NANO_SEPARATOR);
sbTimestamp.append(tsTimestamp.getNanos());
return sbTimestamp.toString();
}
/**
* Convert string to timestamp including if available it"s nanosecond portion
* so that it can be safely restored from variable in web page.
*
* @param strTimestamp - timestamp to convert
* @return Timestamp - restored timestamp
* @throws NumberFormatException - problem parsing the string
*/
public static Timestamp parseTimestamp(
String strTimestamp
) throws NumberFormatException
{
long lTime;
int iNanos;
if ("0".equals(strTimestamp))
{
lTime = 0L;
iNanos = 0;
}
else
{
int iIndex;
iIndex = strTimestamp.indexOf(NANO_SEPARATOR);
if (iIndex == -1)
{
throw new NumberFormatException(
"The timestamp string doesn"t contain nanosecond separator: "
+ strTimestamp);
}
lTime = Long.parseLong(strTimestamp.substring(0, iIndex));
iNanos = Integer.parseInt(strTimestamp.substring(iIndex + 1));
}
return new TimestampCopy(lTime, iNanos);
}
/**
* Function returns time string in the form MM:SS.MS from the input specified in miliseconds.
*
* @param lTimeInMiliseconds - time in miliseconds
* @return String - string representation of miliseconds in the form MM:SS.MS
*/
public static String getStringTime(
long lTimeInMiliseconds
)
{
long lTotalMS = lTimeInMiliseconds;
long lMS = lTotalMS % 1000;
long lTotalSecs = lTotalMS / 1000;
long lSecs = lTotalSecs % 60;
long lTotalMins = lTotalSecs / 60;
long lMinutes = lTotalMins % 60;
long lHours = lTotalMins / 60;
StringBuffer sbBuffer = new StringBuffer();
if (lHours > 0)
{
sbBuffer.append(lHours);
sbBuffer.append(":");
sbBuffer.append(lMinutes);
sbBuffer.append(":");
sbBuffer.append(lSecs);
sbBuffer.append(".");
sbBuffer.append(lMS);
}
else if (lMinutes > 0)
{
sbBuffer.append(lMinutes);
sbBuffer.append(":");
sbBuffer.append(lSecs);
sbBuffer.append(".");
sbBuffer.append(lMS);
}
else if (lSecs > 0)
{
sbBuffer.append(lSecs);
sbBuffer.append(".");
sbBuffer.append(lMS);
sbBuffer.append(" seconds");
}
else
{
sbBuffer.append(lMS);
sbBuffer.append(" ms");
}
return sbBuffer.toString();
}
// TODO: For Miro: Remove this code once all the code which referred to these // was fixed. These should be moved to a GUI or business logic related class. // /** // * Method to check if valid period settings // * // * @param iPeriod - period length // * @param iPeriodType - period type // * @param iPeriodStartType - period start type // * @param iAttributeId - attribute ID for dynamic period start type // * @param bPeriodException - period exception flag // * @param strPeriodName - period name used for exception message // * @param bAdvancePeriodType - flag if advanced period type (includes also start type) // * @param bfideException - invalid data exception // */ // public static void validatePeriod( // int iPeriod, // int iPeriodType, // int iPeriodStartType, // int iAttributeId, // boolean bPeriodException, // String strPeriodName, // boolean bAdvancePeriodType, // OSSInvalidDataException messageException // ) // { // if ((iPeriod > 0) // || ((iPeriodType != TIMING_NONE) && (iPeriodType != TIMING_NEVER)) // || (bPeriodException) || (iPeriodStartType != PERIOD_START_TYPE_NONE)) // { // if (iPeriod <= 0) // { // if (messageException == null) // { // messageException = new OSSInvalidDataException(); // } // messageException.getErrorMessages().addMessage( // PERIOD_TYPE_OBJ, // "You have to set valid period length for " + strPeriodName + " type." // ); // } // else if ((iPeriodType == TIMING_NONE) || (iPeriodType == TIMING_NEVER)) // { // if (messageException == null) // { // messageException = new OSSInvalidDataException(); // } // messageException.getErrorMessages().addMessage( // PERIOD_TYPE_OBJ, // "You have to set valid period type for " + strPeriodName + " type." // ); // } // else if ((bAdvancePeriodType) && (iPeriodStartType == PERIOD_START_TYPE_NONE)) // { // if (messageException == null) // { // messageException = new OSSInvalidDataException(); // } // messageException.getErrorMessages().addMessage( // PERIOD_TYPE_OBJ, // "You have to set valid period start type for " + strPeriodName + " type." // ); // } // else if ((bAdvancePeriodType) // && (iPeriodStartType == PERIOD_START_TYPE_DYNAMIC) // && (iAttributeId == DataObject.NEW_ID)) // { // if (messageException == null) // { // messageException = new OSSInvalidDataException(); // } // messageException.getErrorMessages().addMessage( // PERIOD_TYPE_OBJ, // "You have to set valid period dynamic start attribute for " // + strPeriodName + " type." // ); // } // } // } } /*
* Copyright (c) 2003 - 2007 OpenSubsystems s.r.o. Slovak Republic. All rights reserved. * * Project: OpenSubsystems * * $Id: TimestampCopy.java,v 1.5 2007/01/07 06:14:01 bastafidli Exp $ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/**
* Timestamp which adds copy constructor which correctly copies nanosecond * portion of the original timestamp. * * @version $Id: TimestampCopy.java,v 1.5 2007/01/07 06:14:01 bastafidli Exp $ * @author Miro Halas * @code.reviewer Miro Halas * @code.reviewed 1.3 2006/02/17 06:54:53 bastafidli */
class TimestampCopy extends Timestamp {
// Attributes ///////////////////////////////////////////////////////////////
/**
* Generated serial version id for this class.
*/
private static final long serialVersionUID = 135570135998694876L;
// Constructors /////////////////////////////////////////////////////////////
/**
* Copy constructor which will create exact copy of the timestamp including
* the nanosecond portion.
*
* @param original - original timestamp to copy
*/
public TimestampCopy(
Timestamp original
)
{
// Pass the time portion here
super(original.getTime());
// And now set the correct nanoseconds since it is required.
setNanos(original.getNanos());
}
/**
* Constructor which will create exact copy of the timestamp including
* the nanosecond portion.
*
* @param lTime - time portion of the timestamp
* @param iNanos - nanosecond portion of the timestamp
*/
public TimestampCopy(
long lTime,
int iNanos
)
{
// Pass the time portion here
super(lTime);
// And now set the correct nanoseconds since it is required.
setNanos(iNanos);
}
}
</source>
Compare two Java Date objects using after method example
<source lang="java">
import java.util.Date; public class Main {
public static void main(String[] args) {
Date d1 = new Date();
Date d2 = new Date();
System.out.println("First Date : " + d1);
System.out.println("Second Date : " + d2);
System.out.println("Is second date after first ? : " + d2.after(d1));
}
}
</source>
Compare two Java Date objects using before method example
<source lang="java">
import java.util.Date; public class Main {
public static void main(String[] args) {
Date d1 = new Date();
Date d2 = new Date();
System.out.println("First Date : " + d1);
System.out.println("Second Date : " + d2);
System.out.println("Is first date before second ? : " + d1.before(d2));
}
}
</source>
Compare two Java Date objects using compareTo method example
<source lang="java">
import java.util.Date; public class Main {
public static void main(String[] args) {
Date d1 = new Date();
Date d2 = new Date();
System.out.println("First Date : " + d1);
System.out.println("Second Date : " + d2);
int results = d1.rupareTo(d2);
if (results > 0) {
System.out.println("after");
} else if (results < 0) {
System.out.println("before");
} else {
System.out.println("Both dates are equal");
}
}
}
</source>
Convert a String to Date
<source lang="java">
import java.text.SimpleDateFormat; import java.util.Date; public class Main {
public static void main(String[] args) throws Exception {
SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
Date theDate = dateFormat.parse("01/01/2009");
System.out.println(dateFormat.format(theDate));
}
} //01/01/2009
</source>
Convert Date into milliseconds example
<source lang="java">
import java.util.Date; public class Main {
public static void main(String args[]) {
Date date = new Date();
System.out.println("Date is : " + date);
System.out.println("Milliseconds since January 1, 1970, 00:00:00 GMT : " + date.getTime());
}
}
</source>
Convert date string from one format to another format using SimpleDateFormat
<source lang="java">
import java.text.SimpleDateFormat; import java.util.Date; public class Main {
public static void main(String[] args) throws Exception {
SimpleDateFormat sdfSource = new SimpleDateFormat("dd/MM/yy");
Date date = sdfSource.parse("12/11/09");
SimpleDateFormat sdfDestination = new SimpleDateFormat("MM-dd-yyyy hh:mm:ss");
System.out.println(sdfDestination.format(date));
}
}
</source>
Convert string of time to time object
<source lang="java">
import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; public class Main {
public static void main(String[] args) throws Exception {
String time = "15:30:18";
DateFormat sdf = new SimpleDateFormat("hh:mm:ss");
Date date = sdf.parse(time);
System.out.println("Date and Time: " + date);
}
}
</source>
Convert String to Date object
<source lang="java">
import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; public class Main {
public static void main(String[] args) throws Exception{
DateFormat df = new SimpleDateFormat("dd/MM/yyyy");
Date today = df.parse("20/12/2005");
System.out.println("Today = " + df.format(today));
}
}
</source>
Create instance of java.sql.Date from Calendar.getTimeInMillis()
<source lang="java">
import java.util.Calendar; public class Main {
public static void main(String[] args) {
int year = 2009;
int month = 0; // January
int date = 1;
Calendar cal = Calendar.getInstance();
cal.clear();
cal.set(Calendar.YEAR, year);
cal.set(Calendar.MONTH, month);
cal.set(Calendar.DATE, date);
java.sql.Date sqlDate = new java.sql.Date(cal.getTimeInMillis());
System.out.println(sqlDate);
}
} //2009-01-01
</source>
Create java Date from specific time example
<source lang="java">
import java.util.Date; public class Main {
public static void main(String[] args) {
Date d = new Date(365L * 24L * 60L * 60L * 1000L);
System.out.println(d);
}
}
</source>
Creating a Date Object for a Particular Date
<source lang="java">
import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; public class Main {
public static void main(String[] argv) throws Exception {
Calendar xmas = new GregorianCalendar(1998, Calendar.DECEMBER, 25);
Date date = xmas.getTime();
}
}
</source>
Date utility class
<source lang="java">
/*
* D E E P B L A C K B L O G L I C E N S E * * * Copyright (c) 2001-2003 Timothy J. Kettering All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The names "deepBlack" must not be used to endorse or promote * products derived from this software without prior written * permission. For written permission, please contact * the copyright holder at tim@blackcore.ru. * * * THIS SOFTWARE IS PROVIDED ``AS IS"" AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */
import java.util.Date; import java.util.TimeZone; import java.util.GregorianCalendar; import java.util.Calendar; /**
* Date utility class file. * @author timster@blackcore.ru * Nov 17, 2002 * * @todo - Only the timestamp parameter methods have been tested somewhat * extensively to be sure they return correct timestamps. The string * and integer parameter methods need to be refined for accurate behavior, and * better failsafes. * */
public class DateUtility {
/**
* Returns a primitive long which represents the timestamp of the first millisecond
* of the month matching the supplied parameters. This method assumes the
* default timezone.
* @param year
* @param month
* @return long
*/
static public long getFirstMilliOfMonth(String year, String month)
{
return getFirstMilliOfMonth(year, month, TimeZone.getDefault());
}
/**
* Returns a primitive long which represents the timestamp of the last millisecond
* of the month matching the supplied parameters. This method assumes the
* default timezone.
* @param year
* @param month
* @return long
*/
static public long getLastMilliOfMonth(String year, String month)
{
return getLastMilliOfMonth(year, month, TimeZone.getDefault());
}
/**
* This utility returns the first millsecond
* of the month, and year, and timezone supplied as arguments.
*
* @param String month
* @param String year
* @param TimeZone tz
* @return long
*/
static public long getFirstMilliOfMonth(String year, String month, TimeZone tz)
{
return getFirstMilliOfMonth(Integer.parseInt(year), Integer.parseInt(month), tz);
}
/**
* This utility returns the first millsecond
* of the month, and year, and timezone supplied as arguments.
*
* @param int month
* @param int year
* @param TimeZone tz
* @return long
*/
static public long getFirstMilliOfMonth(int year, int month, TimeZone tz)
{
GregorianCalendar cal = new GregorianCalendar(year, (month - 1), 1);
cal.setTimeZone(tz);
return cal.getTime().getTime();
}
/**
* This will retun the first millisecond of the month
* that contains the timestamp provided
* @param timestamp
* @return long
*/
static public long getFirstMilliOfMonth(long timestamp, TimeZone tz)
{
GregorianCalendar cal = new GregorianCalendar();
cal.setTimeZone(tz);
cal.setTime(new Date(timestamp));
cal.set(Calendar.DAY_OF_MONTH, 1);
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
Date date = cal.getTime();
return date.getTime();
}
/**
* Gets the last millsecond of the month, according to the timestamp and
* timezone arguments.
* @param timestamp
* @param tz
* @return long
*/
static public long getLastMilliOfMonth(long timestamp, TimeZone tz)
{
timestamp = getFirstMilliOfMonth(timestamp, tz);
GregorianCalendar cal = new GregorianCalendar();
cal.setTimeZone(tz);
cal.setTime(new Date(timestamp));
// now we"ll roll the calendar forward one month.
// in the case of december, we need to roll forward the year too
if(cal.get(GregorianCalendar.MONTH) == GregorianCalendar.DECEMBER)
{
cal.roll(GregorianCalendar.YEAR, true);
}
cal.roll(GregorianCalendar.MONTH, true);
long date = cal.getTime().getTime();
date = date - 1L;
return date;
}
/**
* This utility returns the last millsecond
* of the month, and year, and timezone supplied as arguments.
*
* @param String month
* @param String year
* @param TimeZone tz
* @return long
*/
static public long getLastMilliOfMonth(String year, String month, TimeZone tz)
{
long time = getLastMilliOfMonth(Integer.parseInt(year), Integer.parseInt(month), tz);
return time;
}
/**
* This utility returns the last millsecond
* of the month, and year, and timezone supplied as arguments.
*
* @param int month
* @param int year
* @param TimeZone tz
* @return long
*/
static public long getLastMilliOfMonth(int year, int month, TimeZone tz)
{
GregorianCalendar cal = new GregorianCalendar(year, (month - 1), 1);
cal.setTimeZone(tz);
// set the maximum last day
int lastday = cal.getActualMaximum(GregorianCalendar.DAY_OF_MONTH);
cal.set(GregorianCalendar.DAY_OF_MONTH, lastday);
// set other calendar maximums. - we should do this programatically
// too but i"m too lazy, and i dont think they"re gonna change the gregorian
// calendar anytime soon.. eh?
cal.set(GregorianCalendar.HOUR_OF_DAY, 23);
cal.set(GregorianCalendar.MINUTE, 59);
cal.set(GregorianCalendar.SECOND, 59);
cal.set(GregorianCalendar.MILLISECOND, 999);
long time = cal.getTime().getTime();
return time;
}
}
</source>
Date Utils
<source lang="java">
/*
- Caramel - Non-GUI Java Addons
- Copyright (c) 2001, 2002, 2003 by Gerald Bauer
- This program is free software.
- You may redistribute it and/or modify it under the terms of the GNU
- Lesser General Public License as published by the Free Software Foundation.
- Version 2.1 of the license should be included with this distribution in
- the file LICENSE, as well as License.html. If the license is not
- included with this distribution, you may find a copy at the FSF web
- site at "www.gnu.org" or "www.fsf.org", or you may write to the
- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139 USA.
- THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
- NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
- OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
- CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
- REDISTRIBUTION OF THIS SOFTWARE.
- /
import java.text.*; import java.util.*; public class DateUtils {
/**
* RFC 1123 date format example: Mon, 06 May 1996 04:57:00 GMT - days: Mon,
* Tue, Wed, Thu, Fri, Sat, Sun - months: Jan, Feb, Mar, Apr, May, Jun, Jul,
* Aug, Sep, Oct, Nov, Dec
*/
private static SimpleDateFormat _df;
public static String getDate()
{
Calendar cal = Calendar.getInstance();
cal.setTime( new Date() );
int year = cal.get( Calendar.YEAR );
int month = cal.get( Calendar.MONTH ) + 1;
int day = cal.get( Calendar.DAY_OF_MONTH );
return "" + year
+ "-" + month
+ "-" + day;
}
/**
* convienence method returns current timestamp
*/
public static String getHttpDate()
{
return getHttpDate( new Date() );
}
public static String getHttpDate( long timestamp )
{
return getHttpDate( new Date( timestamp ) );
}
public static String getHttpDate( Date date )
{
return _df.format( date );
}
public static String getTime()
{
Calendar cal = Calendar.getInstance();
cal.setTime( new Date() );
int hours = cal.get( Calendar.HOUR_OF_DAY );
// use 24 hour clock
int minutes = cal.get( Calendar.MINUTE );
int seconds = cal.get( Calendar.SECOND );
int milli = cal.get( Calendar.MILLISECOND );
return formatTime( hours, minutes, seconds, milli );
}
public static String getTimestamp()
{
Calendar cal = Calendar.getInstance();
cal.setTime( new Date() );
int year = cal.get( Calendar.YEAR );
int month = cal.get( Calendar.MONTH ) + 1;
int day = cal.get( Calendar.DAY_OF_MONTH );
int hours = cal.get( Calendar.HOUR_OF_DAY );
// use 24 hour clock
int minutes = cal.get( Calendar.MINUTE );
int seconds = cal.get( Calendar.SECOND );
int milli = cal.get( Calendar.MILLISECOND );
return "" + year
+ "-" + month
+ "-" + day
+ "_" + formatTime( hours, minutes, seconds, milli );
}
private static String formatTime( int hours, int minutes, int seconds, int milli )
{
StringBuffer buf = new StringBuffer();
buf.append( "" + hours );
buf.append( "." );
if( minutes < 10 )
buf.append( "0" + minutes );
else
buf.append( "" + minutes );
buf.append( "." );
if( seconds < 10 )
buf.append( "0" + seconds );
else
buf.append( "" + seconds );
buf.append( "-" );
if( milli < 10 )
buf.append( "00" + milli );
else if( milli < 100 )
buf.append( "0" + milli );
else
buf.append( "" + milli );
return buf.toString();
}
static
{
_df = new SimpleDateFormat( "EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US );
_df.setTimeZone( TimeZone.getTimeZone( "GMT" ) );
}
}
</source>
Encapsulates a truck-load of commonly used date functions
<source lang="java">
/*
* Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); you may not * use this file except in compliance with the License. You may obtain a copy of * the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations under * the License. */
import java.util.Calendar; /**
* Encapsulates a truck-load of commonly used date functions. * * @author barclay */
public final class DateUtil {
private Calendar mCal;
private DateUtil.Period mSpan;
private int mSpanOffset = 0;
private boolean mUnitChange = false;
/** Number of milliseconds in a second */
public static final long SECOND_MS = 1000;
/** Number of milliseconds in a minute */
public static final long MINUTE_MS = SECOND_MS * 60;
/** Number of milliseconds in an hour */
public static final long HOUR_MS = MINUTE_MS * 60;
/** Number of milliseconds in a morning or evening (1/2 day) */
public static final long AMPM_MS = HOUR_MS * 12;
/** Number of milliseconds in a day */
public static final long DAY_MS = HOUR_MS * 24;
/** Number of milliseconds in a week */
public static final long WEEK_MS = DAY_MS * 7;
/** Number of milliseconds in a year */
public static final long YEAR_MS = WEEK_MS * 52;
/** Number of milliseconds in a quarter (as defined by 1/4 of a year) */
public static final long QUARTER_MS = WEEK_MS * 13;
/** Number of milliseconds in a month (as defined by 1/12 of a year) */
public static final long MONTH_MS = YEAR_MS / 12;
/**
* Encapsulation of a date broken down by both milliseconds since epoch (as
* defined by the system), and year, month, day, hour, minute, and second. The
* reason for storing both is essentially to cache information and glue the
* variable together into a single item. Purely convenience.
*
* @author barclay
*/
public static class DateItem {
public int mYear = 0;
public int mMonth = 0;
public int mDay = 0;
public int mHour = 0;
public int mMinute = 0;
public int mSecond = 0;
public long mMillis = 0;
/**
* Set all the fields of the DateItem to the date/time represented by the
* current value of the Calendar passed in.
*
* @param c
* The Calendar that"s the source data.
*/
public void setTo(Calendar c) {
mYear = c.get(Calendar.YEAR);
mMonth = c.get(Calendar.MONTH);
mDay = c.get(Calendar.DAY_OF_MONTH);
mHour = c.get(Calendar.HOUR_OF_DAY);
mMinute = c.get(Calendar.MINUTE);
mSecond = c.get(Calendar.SECOND);
mMillis = c.getTimeInMillis();
}
/**
* Compares all the fields of the DateItem to another DateItem. All fields
* are compared, instead of just the millisecond field, in the event that
* all the fields are not in sync for some reason.
*
* @param other
* @return true if the two DateItems are equal in all fields, else false.
*/
public boolean isEqual(DateItem other) {
if (this.mYear == other.mYear && this.mMonth == other.mMonth
&& this.mDay == other.mDay && this.mHour == other.mHour
&& this.mMinute == other.mMinute && this.mSecond == other.mSecond
&& this.mMillis == other.mMillis)
return true;
return false;
}
}
private DateItem mBase;
private DateItem mCursor;
/**
* Code shoulder reference these Periods when refering to spans of time
* instead of Calendar.*, as Calendar doesn"t support the notion of a strict
* QUARTER, and we use WEEK slightly differently.
*
* @author barclay
*/
public enum Period {
MINUTE, HOUR, AMPM, DAY, WEEK, MONTH, QUARTER, YEAR
}
public Period[] PERIODS = { Period.MINUTE, Period.HOUR, Period.AMPM,
Period.DAY, Period.WEEK, Period.MONTH, Period.QUARTER, Period.YEAR };
public static final String[] MONTHS = { "Jan", "Feb", "Mar", "Apr", "May",
"Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
public static final String[] DAYS = { "Sun", "M", "Tu", "W", "Th", "F",
"Sat", };
public static final String[] QUARTERS = { "Q1", "Q2", "Q3", "Q4", };
/**
* Constructor. Instantiates a Calendar member variable to prevent having to
* continually fetch an instance, which is moderately expensive, and create
* cursor used to walk a timeline.
*/
public DateUtil() {
mCal = Calendar.getInstance();
mBase = new DateItem();
mCursor = new DateItem();
}
/**
* Returns the internal Calendar object in it"s current state.
*
* @return The Calendar.
*/
public Calendar getCalendar() {
return mCal;
}
/**
* Used when going to stride along a timeline. This sets the start time of the
* walk.
*
* @param ms
* The start time in milliseconds since epoch.
*/
public void setBaseTime(long ms) {
mBase.mMillis = ms;
millisToComponent(mBase);
copyDate(mBase, mCursor);
}
/**
* Returns the milliseconds until the next Period, as based on the difference
* between the current cursor and the Period. If the current cursor is at the
* start of a Period, ignoring milliseconds, 0 is returned.
*
* @param u
* @return milliseconds until next period.
*/
public long msToNextPeriod(Period u) {
long ms = 0;
switch (u) {
case YEAR:
mCal.set(mCursor.mYear + 1, 0, 0, 0, 0, 0);
ms = mCal.getTimeInMillis() - mCursor.mMillis;
if (ms == YEAR_MS)
ms = 0;
break;
case QUARTER:
if (mCursor.mMonth >= 9)
mCal.set(mCursor.mYear + 1, 0, 0, 0, 0, 0);
else if (mCursor.mMonth >= 6)
mCal.set(mCursor.mYear, 9, 0, 0, 0, 0);
else if (mCursor.mMonth >= 3)
mCal.set(mCursor.mYear, 6, 0, 0, 0, 0);
else
mCal.set(mCursor.mYear, 3, 0, 0, 0, 0);
ms = mCal.getTimeInMillis() - mCursor.mMillis;
if (ms == QUARTER_MS)
ms = 0;
break;
case MONTH:
if (mCursor.mMonth == 11)
mCal.set(mCursor.mYear + 1, 0, 0, 0, 0, 0);
else
mCal.set(mCursor.mYear, mCursor.mMonth + 1, 0, 0, 0, 0);
ms = mCal.getTimeInMillis() - mCursor.mMillis;
if (ms == MONTH_MS)
ms = 0;
break;
case WEEK:
mCal.setTimeInMillis(mCursor.mMillis);
int first = mCal.getFirstDayOfWeek();
mCal.add(Calendar.WEEK_OF_YEAR, 1);
mCal.set(Calendar.DAY_OF_WEEK, first);
mCal.set(Calendar.HOUR_OF_DAY, 0);
mCal.set(Calendar.MINUTE, 0);
mCal.set(Calendar.SECOND, 0);
mCal.set(Calendar.MILLISECOND, 0);
ms = mCal.getTimeInMillis() - mCursor.mMillis;
if (ms == WEEK_MS)
ms = 0;
break;
case DAY:
if (mCursor.mMinute == 0 && mCursor.mHour == 0)
return 0;
ms = ((60 - mCursor.mMinute) + (60 * (24 - mCursor.mHour))) * MINUTE_MS;
break;
case AMPM:
if (mCursor.mMinute == 0 && (mCursor.mHour == 0 || mCursor.mHour == 12))
return 0;
ms = ((60 - mCursor.mMinute) + (60 * (24 - (mCursor.mHour % 12))))
* MINUTE_MS;
break;
case HOUR:
if (mCursor.mMinute == 0)
return 0;
ms = (60 - mCursor.mMinute) * MINUTE_MS;
break;
case MINUTE:
default:
if (mCursor.mSecond == 0)
return 0;
ms = (60 - mCursor.mSecond) * SECOND_MS;
break;
}
return ms;
}
/**
* Sets an offset of the internal marker recording the class of time spanned
* (as a Period). This offset is indexes into the Period enum, e.g., if the
* span is calculated to be Period.YEAR with an offset of 0, then it will be
* calculated to be Period.MONTH with an offset of -2.
*
* @param milliStart
* The milliseconds since epoch in start time, inclusive.
* @param milliEnd
* The milliseconds since epoch in end time, inclusive.
*/
public void setSpanOffset(int offset) {
mSpanOffset = offset;
}
/**
* Sets the internal marker recording the class of time spanned (as a Period)
* for the range of time specified. This is used to determine how to generate
* labels while striding through time. If milliStart == milliEnd, the span
* will be set to the smallest known span.
*
* @param milliStart
* The milliseconds since epoch in start time, inclusive.
* @param milliEnd
* The milliseconds since epoch in end time, inclusive.
*/
public void setSpan(long milliStart, long milliEnd) {
int index = 0;
long range = milliEnd - milliStart;
if (range == 0)
range = 1;
if (range < 0)
range = -range;
if (range > (long) (DateUtil.YEAR_MS * 3)) {
index = DateUtil.Period.YEAR.ordinal();
} else if (range > (long) (DateUtil.QUARTER_MS * 6)) {
index = DateUtil.Period.QUARTER.ordinal();
} else if (range > (long) (DateUtil.MONTH_MS * 6)) {
index = DateUtil.Period.MONTH.ordinal();
} else if (range > (long) (DateUtil.WEEK_MS * 4)) {
index = DateUtil.Period.WEEK.ordinal();
} else if (range > (long) (DateUtil.DAY_MS * 5)) {
index = DateUtil.Period.DAY.ordinal();
} else if (range > (long) (DateUtil.HOUR_MS * 24)) {
index = DateUtil.Period.AMPM.ordinal();
} else if (range > (long) (DateUtil.HOUR_MS * 5)) {
index = DateUtil.Period.HOUR.ordinal();
} else {
index = DateUtil.Period.MINUTE.ordinal();
}
index += mSpanOffset;
if (index < 0)
index = 0;
else if (index >= PERIODS.length)
index = PERIODS.length - 1;
mSpan = PERIODS[index];
return;
}
/**
* Returns the span calculated by {@link #setSpan(long, long)}
*
* @return The span as a DateUtil.Period
* @see DateUtil#Period
*/
public DateUtil.Period getSpan() {
return mSpan;
}
/**
* Returns the selected Calendar.* field of the time under the current cursor
* when striding.
*
* @param p
* The Period in which to format the output.
* @return The field datum.
*/
public int get(int field) {
return mCal.get(field);
}
/**
* Returns an array of two strings yielding a textual representation of the
* time under the current cursor when striding. Neither string will be null,
* but either may be the empty ("") string. Typically, the second string will
* be empty rather than the first, and will contain additional information
* about the label, such as the the month when the days roll over into the
* next month, or the day of the week. This method sets an internal marker
* recording if current label has rolled past a period boundary, such as from
* one week to the next or one year to the next, which is queryable via
* {@link #isUnitChanged()}
*
* @param p
* The Period in which to format the output.
* @return String[2], containing two description strings of the date/time. The
* first string will be withing the Period p, and the
* second is typically auxiliary information.
*/
public String[] getLabel(Period p) {
String[] strings = new String[2];
int minute;
int hour;
int day;
int month;
int year;
int dow;
mUnitChange = false;
switch (p) {
case YEAR:
strings[0] = "" + mCal.get(Calendar.YEAR);
strings[1] = "";
break;
case QUARTER:
year = mCal.get(Calendar.YEAR);
month = mCal.get(Calendar.MONTH);
if (month >= 9)
strings[0] = QUARTERS[3];
else if (month >= 6)
strings[0] = QUARTERS[2];
else if (month >= 3)
strings[0] = QUARTERS[1];
else
strings[0] = QUARTERS[0];
strings[1] = "";
if (year != mBase.mYear) {
strings[1] = "" + mCal.get(Calendar.YEAR);
mUnitChange = true;
}
break;
case MONTH:
year = mCal.get(Calendar.YEAR);
month = mCal.get(Calendar.MONTH);
strings[0] = MONTHS[month];
if (year != mBase.mYear) {
strings[1] = "" + mCal.get(Calendar.YEAR);
mUnitChange = true;
} else {
strings[1] = "";
}
break;
case WEEK:
case DAY:
month = mCal.get(Calendar.MONTH);
day = mCal.get(Calendar.DAY_OF_MONTH);
strings[0] = "" + day;
if (month != mBase.mMonth) {
strings[1] = MONTHS[month];
mUnitChange = true;
} else {
dow = mCal.get(Calendar.DAY_OF_WEEK);
strings[1] = DAYS[dow - 1];
if (dow == 1)
mUnitChange = true;
}
break;
case AMPM:
case HOUR:
day = mCal.get(Calendar.DAY_OF_MONTH);
hour = mCal.get(Calendar.HOUR_OF_DAY);
if (hour == 0) {
strings[0] = "12a";
strings[1] = "midnight";
} else if (hour == 12) {
strings[0] = "12p";
strings[1] = "noon";
} else if (hour > 11) {
strings[0] = (hour - 12) + "p";
strings[1] = "";
} else {
strings[0] = hour + "a";
strings[1] = "";
}
if (day != mBase.mDay) {
dow = mCal.get(Calendar.DAY_OF_WEEK);
strings[0] = mCal.get(Calendar.MONTH) + 1 + "/" + day;
strings[1] = DAYS[dow - 1];
mUnitChange = true;
}
break;
case MINUTE:
default:
minute = mCal.get(Calendar.MINUTE);
hour = mCal.get(Calendar.HOUR_OF_DAY);
strings[0] = l2pad(minute);
strings[1] = "";
if (hour != mBase.mHour) {
if (hour == 0) {
day = mCal.get(Calendar.DAY_OF_MONTH);
dow = mCal.get(Calendar.DAY_OF_WEEK);
strings[0] = mCal.get(Calendar.MONTH) + 1 + "/" + day;
strings[1] = DAYS[dow - 1];
} else if (hour == 12) {
strings[0] = "12";
strings[1] = "noon";
} else if (hour > 11) {
strings[0] = (hour - 12) + "p";
} else {
strings[0] = hour + "a";
}
mUnitChange = true;
} else
break;
}
return strings;
}
/**
* Advances the internal cursor milliseconds in time.
*
* @param milliseconds
* The number of milliseconds to advance.
*/
public void advanceInMs(long milliseconds) {
copyDate(mCursor, mBase);
mCal.setTimeInMillis(mCursor.mMillis);
mCal.add(Calendar.MILLISECOND, (int) milliseconds);
mCursor.mMillis = mCal.getTimeInMillis();
}
/**
* Advances the internal cursor step units of Period
* p in time. Note that for MONTH and QUARTER, this works out to
* 1 and 3 months respectively, as defined by the Calendar class and based on
* the current cursor, not precisely MONTH_MS or QUARTER_MS milliseconds.
*
* @param p
* The DateUtil.Period unit.
* @param step
* The number of Period units to advance.
*/
public void advance(Period p, int step) {
copyDate(mCursor, mBase);
switch (p) {
case YEAR:
mCal.setTimeInMillis(mCursor.mMillis);
mCal.add(Calendar.YEAR, step);
break;
case QUARTER:
mCal.setTimeInMillis(mCursor.mMillis);
mCal.add(Calendar.MONTH, step * 3);
break;
case MONTH:
mCal.setTimeInMillis(mCursor.mMillis);
mCal.add(Calendar.MONTH, step);
break;
case WEEK:
mCal.setTimeInMillis(mCursor.mMillis);
mCal.add(Calendar.WEEK_OF_YEAR, step);
break;
case DAY:
mCal.setTimeInMillis(mCursor.mMillis);
mCal.add(Calendar.DAY_OF_MONTH, step);
break;
case HOUR:
mCal.setTimeInMillis(mCursor.mMillis);
mCal.add(Calendar.HOUR_OF_DAY, step);
break;
case MINUTE:
default:
mCal.setTimeInMillis(mCursor.mMillis);
mCal.add(Calendar.MINUTE, step);
break;
}
mCursor.mMillis = mCal.getTimeInMillis();
millisToComponent(mCursor);
return;
}
/**
* Return whether or not the last getLabel() noted a rollover from one period
* to another, as determine by the Period passed to getLabel().
*
* @return boolean
* @see #getLabel(Period)
*/
public boolean isUnitChanged() {
return mUnitChange;
}
/**
* Returns the average number of milliseconds in a Period. These are constant.
*
* @param u
* @return the number of millseconds
* @see #YEAR_MS
* @see #QUARTER_MS
* @see #MONTH_MS
* @see #DAY_MS
* @see #HOUR_MS
* @see #MINUTE_MS
*/
public long msInPeriod(Period u) {
long ms = 0;
switch (u) {
case YEAR:
ms = YEAR_MS;
break;
case QUARTER:
ms = QUARTER_MS;
break;
case MONTH:
ms = MONTH_MS;
break;
case WEEK:
ms = WEEK_MS;
break;
case DAY:
ms = DAY_MS;
break;
case AMPM:
ms = AMPM_MS;
break;
case HOUR:
ms = HOUR_MS;
break;
case MINUTE:
default:
ms = MINUTE_MS;
break;
}
return ms;
}
/**
* Some external entities still use Calendar.* fields to do some of their own
* date calculations, so this provides a mapping from DateUtil.*_MS to the
* closest Calendar.* field. Note that if the milliseconds is not one of the
* DateUtil constants, the smallest known field will be returned.
*
* @param millis
* The DateUtil.*_MS field to map from.
* @return The int representing the closest Calendar.* field.
*/
public static int mapLongToCal(long millis) {
if (millis == YEAR_MS)
return Calendar.YEAR;
else if (millis == QUARTER_MS)
return Calendar.MONTH; // There is no Calendar.QUARTER, return MONTH
else if (millis == MONTH_MS)
return Calendar.MONTH;
else if (millis == WEEK_MS)
return Calendar.WEEK_OF_YEAR;
else if (millis == DAY_MS)
return Calendar.DAY_OF_MONTH;
else if (millis == AMPM_MS)
return Calendar.AM_PM;
else if (millis == HOUR_MS)
return Calendar.HOUR_OF_DAY;
return Calendar.MINUTE;
}
/**
* Provide a mapping from number of millisecond (DateUtil.*_MS) to a
* DateUtil.Period. Note that if the milliseconds is not one of the DateUtil
* constants, the smallest known field will be returned.
*
* @param millis
* The DateUtil.*_MS field to map from.
* @return The Period enum representing the associated DateUtil.Period.
*/
public static Period mapLongToPeriod(long millis) {
if (millis == YEAR_MS)
return Period.YEAR;
else if (millis == QUARTER_MS)
return Period.QUARTER;
else if (millis == MONTH_MS)
return Period.MONTH;
else if (millis == WEEK_MS)
return Period.WEEK;
else if (millis == DAY_MS)
return Period.DAY;
else if (millis == AMPM_MS)
return Period.AMPM;
else if (millis == HOUR_MS)
return Period.HOUR;
return Period.MINUTE;
}
/**
* Provide a mapping from a Period to the number of millisecond
* (DateUtil.*_MS)
*
* @param The
* Period enum representing the associated DateUtil.Period.
* @return A String describing the period..
*/
public static String mapPeriodToString(Period p) {
if (p == Period.YEAR)
return "year";
if (p == Period.QUARTER)
return "quarter";
if (p == Period.MONTH)
return "month";
if (p == Period.WEEK)
return "week";
if (p == Period.DAY)
return "day";
if (p == Period.AMPM)
return "am/pm";
if (p == Period.HOUR)
return "hour";
return "minute";
}
/**
* Provide a mapping from string to a Period.
*
* @param s
* The string to map from. Case insensitive.
* @return The associated DateUtil.Period
*/
public static Period mapStringToPeriod(String s) {
if (s.toLowerCase().equals("year"))
return Period.YEAR;
if (s.toLowerCase().equals("quarter"))
return Period.QUARTER;
if (s.toLowerCase().equals("month"))
return Period.MONTH;
if (s.toLowerCase().equals("week"))
return Period.WEEK;
if (s.toLowerCase().equals("day"))
return Period.DAY;
if (s.toLowerCase().equals("am/pm"))
return Period.AMPM;
if (s.toLowerCase().equals("hour"))
return Period.HOUR;
return Period.MINUTE;
}
/**
* Provide a mapping from a Period to the number of millisecond
* (DateUtil.*_MS)
*
* @param millis
* The DateUtil.*_MS field to map from.
* @param The
* Period enum representing the associated DateUtil.Period.
* @return the DateUtil.*_MS constant representing the number of milliseconds
* in the period.
*/
public static long mapPeriodToLong(Period p) {
if (p == Period.YEAR)
return YEAR_MS;
if (p == Period.QUARTER)
return QUARTER_MS;
if (p == Period.MONTH)
return MONTH_MS;
if (p == Period.WEEK)
return WEEK_MS;
if (p == Period.DAY)
return DAY_MS;
if (p == Period.AMPM)
return AMPM_MS;
if (p == Period.HOUR)
return HOUR_MS;
return MINUTE_MS;
}
/**
* Returns a description of the milliseconds, scaled to the largest unit and
* rounded to the default number of decimal places, with the associated label
* (e.g., "years", "weeks", etc.)
*
* @param millis
* The milliseconds since epoch to format.
* @return The descriptive string.
*/
public static String toString(float millis) {
if (millis > YEAR_MS) {
return Round(millis / YEAR_MS) + " years";
} else if (millis > QUARTER_MS) {
return Round(millis / QUARTER_MS) + " quarters";
} else if (millis > MONTH_MS) {
return Round(millis / MONTH_MS) + " months";
} else if (millis > WEEK_MS) {
return Round(millis / WEEK_MS) + " weeks";
} else if (millis > DAY_MS) {
return Round(millis / DAY_MS) + " days";
} else if (millis > HOUR_MS) {
return Round(millis / HOUR_MS) + " hours";
} else { // if (millis > MINUTE_MS) {
return Round(millis / MINUTE_MS) + " minutes";
}
}
/**
* Returns a description of the square root of the milliseconds, scaled to the
* largest unit and rounded to the default number of decimal places, with the
* associated label (e.g., "years", "weeks", etc.). Note this is only used for
* displaying the variance, as the variance the a squared value, so this tests
* (millis > (unit^2)) ? and displays the value (millis/(unit^2)). Otherwise
* it is identical to {@link #toString(float)}.
*
* @param millis
* The (squared) milliseconds since epoch to format.
* @return The descriptive string.
*/
public static String toStringSquared(float millis) {
if (millis > (float) YEAR_MS * (float) YEAR_MS) {
return Round(millis / ((float) YEAR_MS * (float) YEAR_MS))
+ " years";
} else if (millis > (float) QUARTER_MS * (float) QUARTER_MS) {
return Round(millis / ((float) QUARTER_MS * (float) QUARTER_MS))
+ " quarters";
} else if (millis > (float) MONTH_MS * (float) MONTH_MS) {
return Round(millis / ((float) MONTH_MS * (float) MONTH_MS))
+ " months";
} else if (millis > (float) WEEK_MS * (float) WEEK_MS) {
return Round(millis / ((float) WEEK_MS * (float) WEEK_MS))
+ " weeks";
} else if (millis > (float) DAY_MS * (float) DAY_MS) {
return Round(millis / ((float) DAY_MS * (float) DAY_MS)) + " days";
} else if (millis > (float) HOUR_MS * (float) HOUR_MS) {
return Round(millis / ((float) HOUR_MS * (float) HOUR_MS))
+ " hours";
} else { // if (millis > MINUTE_MS) {
return Round(millis / ((float) MINUTE_MS * (float) MINUTE_MS))
+ " minutes";
}
}
/**
* Default number of decimal places to round to:
*/
public static final int DECIMAL_PLACES = 2;
/**
* Round a float to the default number of decimal places.
*
* @param value
* The value to round.
* @return The rounded value as a float.
* @see #DECIMAL_PLACES
*/
public static float Round(float value) {
return Round(value, DECIMAL_PLACES);
}
/**
* Round a float to the specified number of decimal places.
*
* @param value
* The value to round.
* @param places
* The number of decimal points.
* @return The rounded value as a float.
*/
public static float Round(float value, int places) {
float p = (float) Math.pow(10, places);
value = value * p;
float tmp = Math.round(value);
return (float) tmp / p;
}
/**
* Returns the "timestamp" string representation of the time in milliseconds:
* yyyy/mm/dd HH:MM:SS
*
* @param millis
* The milliseconds since epoch to format.
* @return The timestamp string.
*/
public static String toTimestamp(long millis) {
Calendar c = Calendar.getInstance();
c.setTimeInMillis(millis);
return DateUtil.toTimestamp(c);
}
/**
* Returns the "short timestamp" string representation of the time in
* milliseconds: HH:MM:SS
*
* @param millis
* The milliseconds since epoch to format.
* @return The short timestamp string.
*/
public static String toShortTimestamp(long millis) {
Calendar c = Calendar.getInstance();
c.setTimeInMillis(millis);
return DateUtil.toShortTimestamp(c);
}
/**
* Utility routine for padding zeros on the left side of an integer out to two
* digits, since string concatenations this small are much more efficient that
* using String.format("%02d",foo).
*
* @param i
* The integer to format.
* @return A zero-padded string representation of the integer.
*/
private static String l2pad(int i) {
if (i < 10)
return "0" + i;
return "" + i;
}
/**
* Returns a "timestamp" formated string representing the time:
* "yyyy/mm/dd HH:MM:SS"
*
* @param d
* The DateItem to format.
* @return The timestamp string.
*/
public static String toTimestamp(DateItem d) {
return d.mYear + "/" + l2pad(d.mMonth + 1) + "/" + l2pad(d.mDay) + " "
+ l2pad(d.mHour) + ":" + l2pad(d.mMinute) + ":" + l2pad(d.mSecond);
}
/**
* Returns a "timestamp" formated string representing the time:
* "yyyy/mm/dd HH:MM:SS"
*
* @param d
* The Calendar to format.
* @return The timestamp string.
*/
public static String toTimestamp(Calendar cal) {
return cal.get(Calendar.YEAR) + "/" + l2pad(cal.get(Calendar.MONTH) + 1)
+ "/" + l2pad(cal.get(Calendar.DAY_OF_MONTH)) + " "
+ l2pad(cal.get(Calendar.HOUR_OF_DAY)) + ":"
+ l2pad(cal.get(Calendar.MINUTE)) + ":"
+ l2pad(cal.get(Calendar.SECOND));
}
/**
* Returns a "short timestamp" formated string representing the time:
* "HH:MM:SS"
*
* @param d
* The Calendar to format.
* @return The timestamp string.
*/
public static String toShortTimestamp(Calendar cal) {
return l2pad(cal.get(Calendar.HOUR_OF_DAY)) + ":"
+ l2pad(cal.get(Calendar.MINUTE)) + ":"
+ l2pad(cal.get(Calendar.SECOND));
}
/**
* Returns a (generally) filesystem-safe formated string representing the
* time: "yyyy-mm-dd_HH.MM.SS"
*
* @param d
* The Calendar to format.
* @return The timestamp string.
*/
public static String toFSTimestamp(Calendar cal) {
return cal.get(Calendar.YEAR) + "-" + l2pad(cal.get(Calendar.MONTH) + 1)
+ "-" + l2pad(cal.get(Calendar.DAY_OF_MONTH)) + "_"
+ l2pad(cal.get(Calendar.HOUR_OF_DAY)) + "."
+ l2pad(cal.get(Calendar.MINUTE)) + "."
+ l2pad(cal.get(Calendar.SECOND));
}
/**
* Returns true if the two calendars represent dates that fall in the same
* year, else false.
*
* @param c1
* Calendar one.
* @param c2
* Calendar two.
* @return boolean.
*/
public static boolean inSameYear(Calendar c1, Calendar c2) {
if (c1.get(Calendar.YEAR) == c2.get(Calendar.YEAR))
return true;
return false;
}
/**
* Returns true if the two calendars represent dates that fall in the same
* quarter, else false. A quarter here is defined as the each group of three
* consecutive months, starting with the month designated as the first month
* by the Calendar package. Thus, it is not defined as the average number of
* milliseconds in a quarter, which would be {@link #YEAR_MS}/4.
*
* @param c1
* Calendar one.
* @param c2
* Calendar two.
* @return boolean.
*/
public static boolean inSameQuarter(Calendar c1, Calendar c2) {
if (inSameYear(c1, c2)) {
int m1 = c1.get(Calendar.MONTH);
int m2 = c2.get(Calendar.MONTH);
if (m1 >= 9 && m2 >= 9)
return true;
if (m1 >= 6 && m1 < 9 && m2 >= 6 && m2 < 9)
return true;
if (m1 >= 3 && m1 < 6 && m2 >= 3 && m2 < 6)
return true;
if (m1 >= 0 && m1 < 3 && m2 >= 0 && m2 < 3)
return true;
}
return false;
}
/**
* Returns true if the two calendars represent dates that fall in the same
* month, else false.
*
* @param c1
* Calendar one.
* @param c2
* Calendar two.
* @return boolean.
*/
public static boolean inSameMonth(Calendar c1, Calendar c2) {
if (inSameYear(c1, c2)
&& (c1.get(Calendar.MONTH) == c2.get(Calendar.MONTH)))
return true;
return false;
}
/**
* Returns true if the two calendars represent dates that fall in the same
* week, else false. A week here is defined by the Calendar.WEEK_OF_YEAR
* package. Special provisions have been made to test weeks than may span the
* end/beginning of a year, and returning true if the two calendars are
* specifying dates within such a week, despite Calendar.WEEK_OF_YEAR being
* unequal for the two Calendars.
*
* @param c1
* Calendar one.
* @param c2
* Calendar two.
* @return boolean.
*/
public static boolean inSameWeek(Calendar c1, Calendar c2) {
if (inSameYear(c1, c2)
&& (c1.get(Calendar.WEEK_OF_YEAR) == c2.get(Calendar.WEEK_OF_YEAR)))
return true;
Calendar tmp;
if (c1.before(c2)) {
tmp = c2;
c2 = c1;
c1 = tmp;
}
int c1week = c1.get(Calendar.WEEK_OF_YEAR);
int c2week = c1.get(Calendar.WEEK_OF_YEAR);
if (c1.get(Calendar.YEAR) == c2.get(Calendar.YEAR) + 1) {
if (c1week == c1.getActualMinimum(Calendar.WEEK_OF_YEAR)
&& c2week == c2.getActualMaximum(Calendar.WEEK_OF_YEAR)) {
tmp = (Calendar) c2.clone();
tmp.add(Calendar.DAY_OF_YEAR, 7);
if (tmp.get(Calendar.WEEK_OF_YEAR) > c1week)
return true;
}
}
return false;
}
/**
* Returns true if the two calendars represent dates that fall in the same
* day, else false.
*
* @param c1
* Calendar one.
* @param c2
* Calendar two.
* @return boolean.
*/
public static boolean inSameDay(Calendar c1, Calendar c2) {
if (inSameYear(c1, c2)
&& (c1.get(Calendar.DAY_OF_YEAR) == c2.get(Calendar.DAY_OF_YEAR)))
return true;
return false;
}
/**
* Returns true if the two calendars represent dates that fall in the same
* morning or evening, as defined by [midnight,noon) and [noon,midnight), else
* false.
*
* @param c1
* Calendar one.
* @param c2
* Calendar two.
* @return boolean.
*/
public static boolean inSameAMPM(Calendar c1, Calendar c2) {
if (inSameDay(c1, c2) && (c1.get(Calendar.AM_PM) == c2.get(Calendar.AM_PM)))
return true;
return false;
}
/**
* Returns true if the two calendars represent dates that fall in the same
* hour, else false.
*
* @param c1
* Calendar one.
* @param c2
* Calendar two.
* @return boolean.
*/
public static boolean inSameHour(Calendar c1, Calendar c2) {
if (inSameDay(c1, c2)
&& (c1.get(Calendar.HOUR_OF_DAY) == c2.get(Calendar.HOUR_OF_DAY)))
return true;
return false;
}
/**
* Returns true if the two calendars represent dates that fall in the same
* period, else false.
*
* @param aggregationMillis
* The period as specified in milliseconds, e.g., DateUtil.YEAR_MS
* @param c1
* Calendar one.
* @param c2
* Calendar two.
* @return boolean.
*/
public static boolean inSamePeriod(Calendar c1, Calendar c2,
long aggregationMillis) {
if (aggregationMillis == 0)
return false;
if ((aggregationMillis == YEAR_MS && inSameYear(c1, c2))
|| (aggregationMillis == QUARTER_MS && inSameQuarter(c1, c2))
|| (aggregationMillis == MONTH_MS && inSameMonth(c1, c2))
|| (aggregationMillis == WEEK_MS && inSameWeek(c1, c2))
|| (aggregationMillis == DAY_MS && inSameDay(c1, c2))
|| (aggregationMillis == AMPM_MS && inSameAMPM(c1, c2))
|| (aggregationMillis == HOUR_MS && inSameHour(c1, c2))) {
return true;
}
return false;
}
/**
* Sets the date/time of the Calendar object to the beginning of the Period by
* setting all fields smaller than the specified period to the minimum value.
*
* @param c
* The calendar to set.
* @param p
* The DateUtil.Period to set.
*/
public static void setToPeriodStart(Calendar c, Period p) {
switch (p) {
case YEAR:
c.set(Calendar.MONTH, 0);
case MONTH:
c.set(Calendar.DAY_OF_MONTH, 1);
case DAY:
c.set(Calendar.HOUR_OF_DAY, 0);
case HOUR:
c.set(Calendar.MINUTE, 0);
case MINUTE:
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
break;
case WEEK:
c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek());
c.set(Calendar.HOUR_OF_DAY, 0);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
break;
case AMPM:
if (c.get(Calendar.AM_PM) == Calendar.AM)
c.set(Calendar.HOUR_OF_DAY, 0);
else
c.set(Calendar.HOUR_OF_DAY, 12);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
break;
case QUARTER:
int month = c.get(Calendar.MONTH);
if (month >= 9)
c.set(Calendar.MONTH, 9);
else if (month >= 9)
c.set(Calendar.MONTH, 6);
else if (month >= 9)
c.set(Calendar.MONTH, 3);
else
c.set(Calendar.MONTH, 0);
c.set(Calendar.DAY_OF_MONTH, 0);
c.set(Calendar.HOUR_OF_DAY, 0);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
break;
}
return;
}
/**
* Utility routine to set each DateTime component field to that specified by
* the DateItem"s millisecond field.
*
* @param d
* The DateItem to modify.
*/
private void millisToComponent(DateItem d) {
mCal.setTimeInMillis(d.mMillis);
d.mYear = mCal.get(Calendar.YEAR);
d.mMonth = mCal.get(Calendar.MONTH);
d.mDay = mCal.get(Calendar.DAY_OF_MONTH);
d.mHour = mCal.get(Calendar.HOUR_OF_DAY);
d.mMinute = mCal.get(Calendar.MINUTE);
}
/**
* Copy all member variable of one DateItem to that of another DateItem.
*
* @param src
* The DateItem to copy from.
* @param dst
* The DateItem to copy to.
*/
private void copyDate(DateItem src, DateItem dst) {
dst.mYear = src.mYear;
dst.mMonth = src.mMonth;
dst.mDay = src.mDay;
dst.mHour = src.mHour;
dst.mMinute = src.mMinute;
dst.mMillis = src.mMillis;
}
}
</source>
Return now as a string
<source lang="java">
/*
* This file is part of JGAP. * * JGAP offers a dual license model containing the LGPL as well as the MPL. * * For licensing information please see the file license.txt included with JGAP * or have a look at the top of class org.jgap.Chromosome which representatively * includes the JGAP license policy applicable for any file delivered with JGAP. */
import java.text.*; import java.util.*; /**
* Utility functions related to date and time. * * @author Klaus Meffert * @since 3.3.3 */
public class DateKit {
/** String containing the CVS revision. Read out via reflection!*/ private final static String CVS_REVISION = "$Revision: 1.4 $"; private static Calendar m_cal = Calendar.getInstance(); public final static String DATEFORMAT_FULL_0 = "yyyyMMddHHmmssSSS"; public final static String DATEFORMAT_FULL_1 = "yyyy/MM/dd HH:mm:ss:SSS"; public final static String DATEFORMAT_NORMAL = "yyyy/MM/dd"; private static SimpleDateFormat m_sdfNow = new SimpleDateFormat(DATEFORMAT_FULL_0);
private static SimpleDateFormat m_sdfToday = new SimpleDateFormat("yyyyMMdd");
/**
* @return now as a string, including milliseconds
*
* @author Klaus Meffert
* @since 3.3.3
*/
public static String getNowAsString() {
return m_sdfNow.format(m_cal.getTime());
}
/**
* @return today as a string
*
* @author Klaus Meffert
* @since 3.3.3
*/
public static String getTodayAsString() {
return m_sdfToday.format(m_cal.getTime());
}
/**
* @param a_date the date to be returned in a specific format
* @param a_dateFormat the desired format of the date
*
* @return date in given format
*
* @author Klaus Meffert
* @since 3.3.4
*/
public static String dateToString(Date a_date, String a_dateFormat) {
SimpleDateFormat sdf = new SimpleDateFormat(a_dateFormat);
return sdf.format(a_date);
}
/**
* @return now
*
* @author Klaus Meffert
* @since 3.3.3
*/
public static Date now() {
return new Date();
}
}
</source>
Return today as a string
<source lang="java">
/*
* This file is part of JGAP. * * JGAP offers a dual license model containing the LGPL as well as the MPL. * * For licensing information please see the file license.txt included with JGAP * or have a look at the top of class org.jgap.Chromosome which representatively * includes the JGAP license policy applicable for any file delivered with JGAP. */
import java.text.*; import java.util.*; /**
* Utility functions related to date and time. * * @author Klaus Meffert * @since 3.3.3 */
public class DateKit {
/** String containing the CVS revision. Read out via reflection!*/ private final static String CVS_REVISION = "$Revision: 1.4 $"; private static Calendar m_cal = Calendar.getInstance(); public final static String DATEFORMAT_FULL_0 = "yyyyMMddHHmmssSSS"; public final static String DATEFORMAT_FULL_1 = "yyyy/MM/dd HH:mm:ss:SSS"; public final static String DATEFORMAT_NORMAL = "yyyy/MM/dd"; private static SimpleDateFormat m_sdfNow = new SimpleDateFormat(DATEFORMAT_FULL_0);
private static SimpleDateFormat m_sdfToday = new SimpleDateFormat("yyyyMMdd");
/**
* @return now as a string, including milliseconds
*
* @author Klaus Meffert
* @since 3.3.3
*/
public static String getNowAsString() {
return m_sdfNow.format(m_cal.getTime());
}
/**
* @return today as a string
*
* @author Klaus Meffert
* @since 3.3.3
*/
public static String getTodayAsString() {
return m_sdfToday.format(m_cal.getTime());
}
/**
* @param a_date the date to be returned in a specific format
* @param a_dateFormat the desired format of the date
*
* @return date in given format
*
* @author Klaus Meffert
* @since 3.3.4
*/
public static String dateToString(Date a_date, String a_dateFormat) {
SimpleDateFormat sdf = new SimpleDateFormat(a_dateFormat);
return sdf.format(a_date);
}
/**
* @return now
*
* @author Klaus Meffert
* @since 3.3.3
*/
public static Date now() {
return new Date();
}
}
</source>
Sets the day of month field to a date returning a new object.
<source lang="java">
import java.util.Calendar; import java.util.Date; /**
* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
/**
A suite of utilities surrounding the use of the * {@link java.util.Calendar} and {@link java.util.Date} object.
**
DateUtils contains a lot of common methods considering manipulations * of Dates or Calendars. Some methods require some extra explanation. * The truncate and round methods could be considered the Math.floor(), * Math.ceil() or Math.round versions for dates * This way date-fields will be ignored in bottom-up order. * As a complement to these methods we"ve introduced some fragment-methods. * With these methods the Date-fields will be ignored in top-down order. * Since a date without a year is not a valid date, you have to decide in what * kind of date-field you want your result, for instance milliseconds or days. *
* * * * @author * @author Phil Steitz * @author Robert Scholte * @since 2.0 * @version $Id: DateUtils.java 634096 2008-03-06 00:58:11Z niallp $ */
public class Main {
//-----------------------------------------------------------------------
/**
* Sets the day of month field to a date returning a new object.
* The original date object is unchanged.
*
* @param date the date, not null
* @param amount the amount to set
* @return a new Date object set with the specified value
* @throws IllegalArgumentException if the date is null
* @since 2.4
*/
public static Date setDays(Date date, int amount) {
return set(date, Calendar.DAY_OF_MONTH, amount);
}
//-----------------------------------------------------------------------
/**
* Sets the specified field to a date returning a new object.
* This does not use a lenient calendar.
* The original date object is unchanged.
*
* @param date the date, not null
* @param calendarField the calendar field to set the amount to
* @param amount the amount to set
* @return a new Date object set with the specified value
* @throws IllegalArgumentException if the date is null
* @since 2.4
*/
private static Date set(Date date, int calendarField, int amount) {
if (date == null) {
throw new IllegalArgumentException("The date must not be null");
}
// getInstance() returns a new object, so this method is thread safe.
Calendar c = Calendar.getInstance();
c.setLenient(false);
c.setTime(date);
c.set(calendarField, amount);
return c.getTime();
}
}
</source>
Sets the hours field to a date returning a new object. Hours range from 0-23.
<source lang="java">
import java.util.Calendar; import java.util.Date; /**
* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
/**
A suite of utilities surrounding the use of the * {@link java.util.Calendar} and {@link java.util.Date} object.
**
DateUtils contains a lot of common methods considering manipulations * of Dates or Calendars. Some methods require some extra explanation. * The truncate and round methods could be considered the Math.floor(), * Math.ceil() or Math.round versions for dates * This way date-fields will be ignored in bottom-up order. * As a complement to these methods we"ve introduced some fragment-methods. * With these methods the Date-fields will be ignored in top-down order. * Since a date without a year is not a valid date, you have to decide in what * kind of date-field you want your result, for instance milliseconds or days. *
* * * * @author * @author Phil Steitz * @author Robert Scholte * @since 2.0 * @version $Id: DateUtils.java 634096 2008-03-06 00:58:11Z niallp $ */
public class Main {
//-----------------------------------------------------------------------
/**
* Sets the hours field to a date returning a new object. Hours range
* from 0-23.
* The original date object is unchanged.
*
* @param date the date, not null
* @param amount the amount to set
* @return a new Date object set with the specified value
* @throws IllegalArgumentException if the date is null
* @since 2.4
*/
public static Date setHours(Date date, int amount) {
return set(date, Calendar.HOUR_OF_DAY, amount);
}
//-----------------------------------------------------------------------
/**
* Sets the specified field to a date returning a new object.
* This does not use a lenient calendar.
* The original date object is unchanged.
*
* @param date the date, not null
* @param calendarField the calendar field to set the amount to
* @param amount the amount to set
* @return a new Date object set with the specified value
* @throws IllegalArgumentException if the date is null
* @since 2.4
*/
private static Date set(Date date, int calendarField, int amount) {
if (date == null) {
throw new IllegalArgumentException("The date must not be null");
}
// getInstance() returns a new object, so this method is thread safe.
Calendar c = Calendar.getInstance();
c.setLenient(false);
c.setTime(date);
c.set(calendarField, amount);
return c.getTime();
}
}
</source>
Sets the miliseconds field to a date returning a new object.
<source lang="java">
import java.util.Calendar; import java.util.Date; /**
* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
/**
A suite of utilities surrounding the use of the * {@link java.util.Calendar} and {@link java.util.Date} object.
**
DateUtils contains a lot of common methods considering manipulations * of Dates or Calendars. Some methods require some extra explanation. * The truncate and round methods could be considered the Math.floor(), * Math.ceil() or Math.round versions for dates * This way date-fields will be ignored in bottom-up order. * As a complement to these methods we"ve introduced some fragment-methods. * With these methods the Date-fields will be ignored in top-down order. * Since a date without a year is not a valid date, you have to decide in what * kind of date-field you want your result, for instance milliseconds or days. *
* * * * @author * @author Phil Steitz * @author Robert Scholte * @since 2.0 * @version $Id: DateUtils.java 634096 2008-03-06 00:58:11Z niallp $ */
public class Main {
//-----------------------------------------------------------------------
/**
* Sets the miliseconds field to a date returning a new object.
* The original date object is unchanged.
*
* @param date the date, not null
* @param amount the amount to set
* @return a new Date object set with the specified value
* @throws IllegalArgumentException if the date is null
* @since 2.4
*/
public static Date setMilliseconds(Date date, int amount) {
return set(date, Calendar.MILLISECOND, amount);
}
//-----------------------------------------------------------------------
/**
* Sets the specified field to a date returning a new object.
* This does not use a lenient calendar.
* The original date object is unchanged.
*
* @param date the date, not null
* @param calendarField the calendar field to set the amount to
* @param amount the amount to set
* @return a new Date object set with the specified value
* @throws IllegalArgumentException if the date is null
* @since 2.4
*/
private static Date set(Date date, int calendarField, int amount) {
if (date == null) {
throw new IllegalArgumentException("The date must not be null");
}
// getInstance() returns a new object, so this method is thread safe.
Calendar c = Calendar.getInstance();
c.setLenient(false);
c.setTime(date);
c.set(calendarField, amount);
return c.getTime();
}
}
</source>
Sets the minute field to a date returning a new object.
<source lang="java">
import java.util.Calendar; import java.util.Date; /**
* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
/**
A suite of utilities surrounding the use of the * {@link java.util.Calendar} and {@link java.util.Date} object.
**
DateUtils contains a lot of common methods considering manipulations * of Dates or Calendars. Some methods require some extra explanation. * The truncate and round methods could be considered the Math.floor(), * Math.ceil() or Math.round versions for dates * This way date-fields will be ignored in bottom-up order. * As a complement to these methods we"ve introduced some fragment-methods. * With these methods the Date-fields will be ignored in top-down order. * Since a date without a year is not a valid date, you have to decide in what * kind of date-field you want your result, for instance milliseconds or days. *
* * * * @author * @author Phil Steitz * @author Robert Scholte * @since 2.0 * @version $Id: DateUtils.java 634096 2008-03-06 00:58:11Z niallp $ */
public class Main {
//-----------------------------------------------------------------------
/**
* Sets the minute field to a date returning a new object.
* The original date object is unchanged.
*
* @param date the date, not null
* @param amount the amount to set
* @return a new Date object set with the specified value
* @throws IllegalArgumentException if the date is null
* @since 2.4
*/
public static Date setMinutes(Date date, int amount) {
return set(date, Calendar.MINUTE, amount);
}
//-----------------------------------------------------------------------
/**
* Sets the specified field to a date returning a new object.
* This does not use a lenient calendar.
* The original date object is unchanged.
*
* @param date the date, not null
* @param calendarField the calendar field to set the amount to
* @param amount the amount to set
* @return a new Date object set with the specified value
* @throws IllegalArgumentException if the date is null
* @since 2.4
*/
private static Date set(Date date, int calendarField, int amount) {
if (date == null) {
throw new IllegalArgumentException("The date must not be null");
}
// getInstance() returns a new object, so this method is thread safe.
Calendar c = Calendar.getInstance();
c.setLenient(false);
c.setTime(date);
c.set(calendarField, amount);
return c.getTime();
}
}
</source>
Sets the seconds field to a date returning a new object.
<source lang="java">
import java.util.Calendar; import java.util.Date; /**
* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
/**
A suite of utilities surrounding the use of the * {@link java.util.Calendar} and {@link java.util.Date} object.
**
DateUtils contains a lot of common methods considering manipulations * of Dates or Calendars. Some methods require some extra explanation. * The truncate and round methods could be considered the Math.floor(), * Math.ceil() or Math.round versions for dates * This way date-fields will be ignored in bottom-up order. * As a complement to these methods we"ve introduced some fragment-methods. * With these methods the Date-fields will be ignored in top-down order. * Since a date without a year is not a valid date, you have to decide in what * kind of date-field you want your result, for instance milliseconds or days. *
* * * * @author * @author Phil Steitz * @author Robert Scholte * @since 2.0 * @version $Id: DateUtils.java 634096 2008-03-06 00:58:11Z niallp $ */
public class Main {
//-----------------------------------------------------------------------
/**
* Sets the seconds field to a date returning a new object.
* The original date object is unchanged.
*
* @param date the date, not null
* @param amount the amount to set
* @return a new Date object set with the specified value
* @throws IllegalArgumentException if the date is null
* @since 2.4
*/
public static Date setSeconds(Date date, int amount) {
return set(date, Calendar.SECOND, amount);
}
//-----------------------------------------------------------------------
/**
* Sets the specified field to a date returning a new object.
* This does not use a lenient calendar.
* The original date object is unchanged.
*
* @param date the date, not null
* @param calendarField the calendar field to set the amount to
* @param amount the amount to set
* @return a new Date object set with the specified value
* @throws IllegalArgumentException if the date is null
* @since 2.4
*/
private static Date set(Date date, int calendarField, int amount) {
if (date == null) {
throw new IllegalArgumentException("The date must not be null");
}
// getInstance() returns a new object, so this method is thread safe.
Calendar c = Calendar.getInstance();
c.setLenient(false);
c.setTime(date);
c.set(calendarField, amount);
return c.getTime();
}
}
</source>
Sets the years field to a date returning a new object.
<source lang="java">
import java.util.Calendar; import java.util.Date; /**
* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
/**
A suite of utilities surrounding the use of the * {@link java.util.Calendar} and {@link java.util.Date} object.
**
DateUtils contains a lot of common methods considering manipulations * of Dates or Calendars. Some methods require some extra explanation. * The truncate and round methods could be considered the Math.floor(), * Math.ceil() or Math.round versions for dates * This way date-fields will be ignored in bottom-up order. * As a complement to these methods we"ve introduced some fragment-methods. * With these methods the Date-fields will be ignored in top-down order. * Since a date without a year is not a valid date, you have to decide in what * kind of date-field you want your result, for instance milliseconds or days. *
* * * * @author * @author Phil Steitz * @author Robert Scholte * @since 2.0 * @version $Id: DateUtils.java 634096 2008-03-06 00:58:11Z niallp $ */
public class Main {
//-----------------------------------------------------------------------
/**
* Sets the years field to a date returning a new object.
* The original date object is unchanged.
*
* @param date the date, not null
* @param amount the amount to set
* @return a new Date object set with the specified value
* @throws IllegalArgumentException if the date is null
* @since 2.4
*/
public static Date setYears(Date date, int amount) {
return set(date, Calendar.YEAR, amount);
}
//-----------------------------------------------------------------------
/**
* Sets the specified field to a date returning a new object.
* This does not use a lenient calendar.
* The original date object is unchanged.
*
* @param date the date, not null
* @param calendarField the calendar field to set the amount to
* @param amount the amount to set
* @return a new Date object set with the specified value
* @throws IllegalArgumentException if the date is null
* @since 2.4
*/
private static Date set(Date date, int calendarField, int amount) {
if (date == null) {
throw new IllegalArgumentException("The date must not be null");
}
// getInstance() returns a new object, so this method is thread safe.
Calendar c = Calendar.getInstance();
c.setLenient(false);
c.setTime(date);
c.set(calendarField, amount);
return c.getTime();
}
}
</source>
Truncate this date(Calendar), leaving the field specified as the most significant field.
<source lang="java">
import java.util.Calendar; import java.util.Date; /**
* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
/**
A suite of utilities surrounding the use of the * {@link java.util.Calendar} and {@link java.util.Date} object.
**
DateUtils contains a lot of common methods considering manipulations * of Dates or Calendars. Some methods require some extra explanation. * The truncate and round methods could be considered the Math.floor(), * Math.ceil() or Math.round versions for dates * This way date-fields will be ignored in bottom-up order. * As a complement to these methods we"ve introduced some fragment-methods. * With these methods the Date-fields will be ignored in top-down order. * Since a date without a year is not a valid date, you have to decide in what * kind of date-field you want your result, for instance milliseconds or days. *
* * * * @author * @author Phil Steitz * @author Robert Scholte * @since 2.0 * @version $Id: DateUtils.java 634096 2008-03-06 00:58:11Z niallp $ */
public class Main {
private static final int[][] fields = {
{Calendar.MILLISECOND},
{Calendar.SECOND},
{Calendar.MINUTE},
{Calendar.HOUR_OF_DAY, Calendar.HOUR},
{Calendar.DATE, Calendar.DAY_OF_MONTH, Calendar.AM_PM
/* Calendar.DAY_OF_YEAR, Calendar.DAY_OF_WEEK, Calendar.DAY_OF_WEEK_IN_MONTH */
},
{Calendar.MONTH, DateUtils.SEMI_MONTH},
{Calendar.YEAR},
{Calendar.ERA}};
/***
Truncate this date, leaving the field specified as the most * significant field.
**
For example, if you had the datetime of 28 Mar 2002 * 13:45:01.231, if you passed with HOUR, it would return 28 Mar * 2002 13:00:00.000. If this was passed with MONTH, it would * return 1 Mar 2002 0:00:00.000.
* * @param date the date to work with * @param field the field from*Calendar* orSEMI_MONTH* @return the rounded date (a different object) * @throws IllegalArgumentException if the date isnull* @throws ArithmeticException if the year is over 280 million */ public static Calendar truncate(Calendar date, int field) { if (date == null) { throw new IllegalArgumentException("The date must not be null"); } Calendar truncated = (Calendar) date.clone(); modify(truncated, field, false); return truncated; } //----------------------------------------------------------------------- /**
Internal calculation method.
*
* @param val the calendar
* @param field the field constant
* @param round true to round, false to truncate
* @throws ArithmeticException if the year is over 280 million
*/
private static void modify(Calendar val, int field, boolean round) {
if (val.get(Calendar.YEAR) > 280000000) {
throw new ArithmeticException("Calendar value too large for accurate calculations");
}
if (field == Calendar.MILLISECOND) {
return;
}
// ----------------- Fix for LANG-59 ---------------------- START ---------------
// see http://issues.apache.org/jira/browse/LANG-59
//
// Manually truncate milliseconds, seconds and minutes, rather than using
// Calendar methods.
Date date = val.getTime();
long time = date.getTime();
boolean done = false;
// truncate milliseconds
int millisecs = val.get(Calendar.MILLISECOND);
if (!round || millisecs < 500) {
time = time - millisecs;
}
if (field == Calendar.SECOND) {
done = true;
}
// truncate seconds
int seconds = val.get(Calendar.SECOND);
if (!done && (!round || seconds < 30)) {
time = time - (seconds * 1000L);
}
if (field == Calendar.MINUTE) {
done = true;
}
// truncate minutes
int minutes = val.get(Calendar.MINUTE);
if (!done && (!round || minutes < 30)) {
time = time - (minutes * 60000L);
}
// reset time
if (date.getTime() != time) {
date.setTime(time);
val.setTime(date);
}
// ----------------- Fix for LANG-59 ----------------------- END ----------------
boolean roundUp = false;
for (int i = 0; i < fields.length; i++) {
for (int j = 0; j < fields[i].length; j++) {
if (fields[i][j] == field) {
//This is our field... we stop looping
if (round && roundUp) {
if (field == DateUtils.SEMI_MONTH) {
//This is a special case that"s hard to generalize
//If the date is 1, we round up to 16, otherwise
// we subtract 15 days and add 1 month
if (val.get(Calendar.DATE) == 1) {
val.add(Calendar.DATE, 15);
} else {
val.add(Calendar.DATE, -15);
val.add(Calendar.MONTH, 1);
}
} else {
//We need at add one to this field since the
// last number causes us to round up
val.add(fields[i][0], 1);
}
}
return;
}
}
//We have various fields that are not easy roundings
int offset = 0;
boolean offsetSet = false;
//These are special types of fields that require different rounding rules
switch (field) {
case DateUtils.SEMI_MONTH:
if (fields[i][0] == Calendar.DATE) {
//If we"re going to drop the DATE field"s value,
// we want to do this our own way.
//We need to subtrace 1 since the date has a minimum of 1
offset = val.get(Calendar.DATE) - 1;
//If we"re above 15 days adjustment, that means we"re in the
// bottom half of the month and should stay accordingly.
if (offset >= 15) {
offset -= 15;
}
//Record whether we"re in the top or bottom half of that range
roundUp = offset > 7;
offsetSet = true;
}
break;
case Calendar.AM_PM:
if (fields[i][0] == Calendar.HOUR_OF_DAY) {
//If we"re going to drop the HOUR field"s value,
// we want to do this our own way.
offset = val.get(Calendar.HOUR_OF_DAY);
if (offset >= 12) {
offset -= 12;
}
roundUp = offset > 6;
offsetSet = true;
}
break;
}
if (!offsetSet) {
int min = val.getActualMinimum(fields[i][0]);
int max = val.getActualMaximum(fields[i][0]);
//Calculate the offset from the minimum allowed value
offset = val.get(fields[i][0]) - min;
//Set roundUp if this is more than half way between the minimum and maximum
roundUp = offset > ((max - min) / 2);
}
//We need to remove this field
if (offset != 0) {
val.set(fields[i][0], val.get(fields[i][0]) - offset);
}
}
throw new IllegalArgumentException("The field " + field + " is not supported");
}
}
</source>
Truncate this date, leaving the field specified as the most significant field.
<source lang="java">
import java.util.Calendar; import java.util.Date; /**
* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */
/**
A suite of utilities surrounding the use of the * {@link java.util.Calendar} and {@link java.util.Date} object.
**
DateUtils contains a lot of common methods considering manipulations * of Dates or Calendars. Some methods require some extra explanation. * The truncate and round methods could be considered the Math.floor(), * Math.ceil() or Math.round versions for dates * This way date-fields will be ignored in bottom-up order. * As a complement to these methods we"ve introduced some fragment-methods. * With these methods the Date-fields will be ignored in top-down order. * Since a date without a year is not a valid date, you have to decide in what * kind of date-field you want your result, for instance milliseconds or days. *
* * * * @author * @author Phil Steitz * @author Robert Scholte * @since 2.0 * @version $Id: DateUtils.java 634096 2008-03-06 00:58:11Z niallp $ */
public class Main {
private static final int[][] fields = {
{Calendar.MILLISECOND},
{Calendar.SECOND},
{Calendar.MINUTE},
{Calendar.HOUR_OF_DAY, Calendar.HOUR},
{Calendar.DATE, Calendar.DAY_OF_MONTH, Calendar.AM_PM
/* Calendar.DAY_OF_YEAR, Calendar.DAY_OF_WEEK, Calendar.DAY_OF_WEEK_IN_MONTH */
},
{Calendar.MONTH, DateUtils.SEMI_MONTH},
{Calendar.YEAR},
{Calendar.ERA}};
//----------------------------------------------------------------------- /***
Truncate this date, leaving the field specified as the most * significant field.
**
For example, if you had the datetime of 28 Mar 2002 * 13:45:01.231, if you passed with HOUR, it would return 28 Mar * 2002 13:00:00.000. If this was passed with MONTH, it would * return 1 Mar 2002 0:00:00.000.
* * @param date the date to work with * @param field the field from*Calendar* orSEMI_MONTH* @return the rounded date * @throws IllegalArgumentException if the date isnull* @throws ArithmeticException if the year is over 280 million */ public static Date truncate(Date date, int field) { if (date == null) { throw new IllegalArgumentException("The date must not be null"); } Calendar gval = Calendar.getInstance(); gval.setTime(date); modify(gval, field, false); return gval.getTime(); } //----------------------------------------------------------------------- /**
Internal calculation method.
*
* @param val the calendar
* @param field the field constant
* @param round true to round, false to truncate
* @throws ArithmeticException if the year is over 280 million
*/
private static void modify(Calendar val, int field, boolean round) {
if (val.get(Calendar.YEAR) > 280000000) {
throw new ArithmeticException("Calendar value too large for accurate calculations");
}
if (field == Calendar.MILLISECOND) {
return;
}
// ----------------- Fix for LANG-59 ---------------------- START ---------------
// see http://issues.apache.org/jira/browse/LANG-59
//
// Manually truncate milliseconds, seconds and minutes, rather than using
// Calendar methods.
Date date = val.getTime();
long time = date.getTime();
boolean done = false;
// truncate milliseconds
int millisecs = val.get(Calendar.MILLISECOND);
if (!round || millisecs < 500) {
time = time - millisecs;
}
if (field == Calendar.SECOND) {
done = true;
}
// truncate seconds
int seconds = val.get(Calendar.SECOND);
if (!done && (!round || seconds < 30)) {
time = time - (seconds * 1000L);
}
if (field == Calendar.MINUTE) {
done = true;
}
// truncate minutes
int minutes = val.get(Calendar.MINUTE);
if (!done && (!round || minutes < 30)) {
time = time - (minutes * 60000L);
}
// reset time
if (date.getTime() != time) {
date.setTime(time);
val.setTime(date);
}
// ----------------- Fix for LANG-59 ----------------------- END ----------------
boolean roundUp = false;
for (int i = 0; i < fields.length; i++) {
for (int j = 0; j < fields[i].length; j++) {
if (fields[i][j] == field) {
//This is our field... we stop looping
if (round && roundUp) {
if (field == DateUtils.SEMI_MONTH) {
//This is a special case that"s hard to generalize
//If the date is 1, we round up to 16, otherwise
// we subtract 15 days and add 1 month
if (val.get(Calendar.DATE) == 1) {
val.add(Calendar.DATE, 15);
} else {
val.add(Calendar.DATE, -15);
val.add(Calendar.MONTH, 1);
}
} else {
//We need at add one to this field since the
// last number causes us to round up
val.add(fields[i][0], 1);
}
}
return;
}
}
//We have various fields that are not easy roundings
int offset = 0;
boolean offsetSet = false;
//These are special types of fields that require different rounding rules
switch (field) {
case DateUtils.SEMI_MONTH:
if (fields[i][0] == Calendar.DATE) {
//If we"re going to drop the DATE field"s value,
// we want to do this our own way.
//We need to subtrace 1 since the date has a minimum of 1
offset = val.get(Calendar.DATE) - 1;
//If we"re above 15 days adjustment, that means we"re in the
// bottom half of the month and should stay accordingly.
if (offset >= 15) {
offset -= 15;
}
//Record whether we"re in the top or bottom half of that range
roundUp = offset > 7;
offsetSet = true;
}
break;
case Calendar.AM_PM:
if (fields[i][0] == Calendar.HOUR_OF_DAY) {
//If we"re going to drop the HOUR field"s value,
// we want to do this our own way.
offset = val.get(Calendar.HOUR_OF_DAY);
if (offset >= 12) {
offset -= 12;
}
roundUp = offset > 6;
offsetSet = true;
}
break;
}
if (!offsetSet) {
int min = val.getActualMinimum(fields[i][0]);
int max = val.getActualMaximum(fields[i][0]);
//Calculate the offset from the minimum allowed value
offset = val.get(fields[i][0]) - min;
//Set roundUp if this is more than half way between the minimum and maximum
roundUp = offset > ((max - min) / 2);
}
//We need to remove this field
if (offset != 0) {
val.set(fields[i][0], val.get(fields[i][0]) - offset);
}
}
throw new IllegalArgumentException("The field " + field + " is not supported");
}
}
</source>
