Java/Database SQL JDBC/Data Type
Версия от 18:01, 31 мая 2010; (обсуждение)
Create new data type
/*
Copyright 2003 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
Use of this software is authorized pursuant to the terms of the license found at
http://developer.java.sun.ru/berkeley_license.html.
Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
- Redistribution of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
- Redistribution 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.
Neither the name of Sun Microsystems, Inc. or the names of contributors may
be used to endorse or promote products derived from this software without
specific prior written permission.
This software is provided "AS IS," without a warranty of any kind.
ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICORSYSTEMS, INC. ("SUN")
AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF
LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN
IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
You acknowledge that this software is not designed, licensed or intended for
use in the design, construction, operation or maintenance of any nuclear
facility.
*/
/*
* Copyright 2003 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
* Use of this software is authorized pursuant to the terms of the license found at
* http://developer.java.sun.ru/berkeley_license.html.
*/
import java.sql.*;
import java.util.*;
public class CreateNewType {
public static void main(String [] args) {
String url = "jdbc:mySubprotocol:myDataSource";
Connection con;
Statement stmt;
try {
Class.forName("myDriver.ClassName");
} catch(java.lang.ClassNotFoundException e) {
System.err.print("ClassNotFoundException: ");
System.err.println(e.getMessage());
}
try {
con = DriverManager.getConnection(url,
"myLogin", "myPassword");
stmt = con.createStatement();
String typeToCreate = null;
String prompt = "Enter "s" to create a structured type " +
"or "d" to create a distinct type\n" +
"and hit Return: ";
do {
typeToCreate = getInput(prompt) + " ";
typeToCreate = typeToCreate.toLowerCase().substring(0, 1);
} while ( !(typeToCreate.equals("s") || typeToCreate.equals("d")) );
Vector dataTypes = getDataTypes(con, typeToCreate);
String typeName;
String attributeName;
String sqlType;
prompt = "Enter the new type name and hit Return: ";
typeName = getInput(prompt);
String createTypeString = "create type " + typeName;
if ( typeToCreate.equals("d") )
createTypeString += " as ";
else
createTypeString += " (";
String commaAndSpace = ", ";
boolean firstTime = true;
while (true){
System.out.println("");
prompt = "Enter an attribute name " +
"(or nothing when finished) \nand hit Return: ";
attributeName = getInput(prompt);
if (firstTime) {
if (attributeName.length() == 0) {
System.out.print("Need at least one attribute;");
System.out.println(" please try again");
continue;
} else {
createTypeString += attributeName + " ";
firstTime = false;
}
} else if (attributeName.length() == 0) {
break;
} else {
createTypeString += commaAndSpace
+ attributeName + " ";
}
String localTypeName = null;
String paramString = "";
while (true) {
System.out.println("");
System.out.println("LIST OF TYPES YOU MAY USE: ");
boolean firstPrinted = true;
int length = 0;
for (int i = 0; i < dataTypes.size(); i++) {
DataType dataType = (DataType)dataTypes.get(i);
if (!dataType.needsToBeSet()) {
if (!firstPrinted)
System.out.print(commaAndSpace);
else
firstPrinted = false;
System.out.print(dataType.getSQLType());
length += dataType.getSQLType().length();
if ( length > 50 ) {
System.out.println("");
length = 0;
firstPrinted = true;
}
}
}
System.out.println("");
int index;
prompt = "Enter an attribute type " +
"from the list and hit Return: ";
sqlType = getInput(prompt);
for (index = 0; index < dataTypes.size(); index++) {
DataType dataType = (DataType)dataTypes.get(index);
if (dataType.getSQLType().equalsIgnoreCase(
sqlType) &&
!dataType.needsToBeSet()) {
break;
}
}
localTypeName = null;
paramString = "";
if (index < dataTypes.size()) { // there was a match
String params;
DataType dataType = (DataType)dataTypes.get(index);
params = dataType.getParams();
localTypeName = dataType.getLocalType();
if (params != null) {
prompt = "Enter " + params + ": ";
paramString = "(" + getInput(prompt) + ")";
}
break;
}
else { // use the name as given
prompt = "Are you sure? " +
"Enter "y" or "n" and hit Return: ";
String check = getInput(prompt) + " ";
check = check.toLowerCase().substring(0,1);
if (check.equals("n"))
continue;
else {
localTypeName = sqlType;
break;
}
}
}
createTypeString += localTypeName + paramString;
if ( typeToCreate.equals("d") ) break;
}
if ( typeToCreate.equals("s") ) createTypeString += ")";
System.out.println("");
System.out.print("Your CREATE TYPE statement as ");
System.out.println("sent to your DBMS: ");
System.out.println(createTypeString);
System.out.println("");
stmt.executeUpdate(createTypeString);
stmt.close();
con.close();
} catch(SQLException ex) {
System.err.println("SQLException: " + ex.getMessage());
}
}
private static Vector getDataTypes(Connection con, String typeToCreate )
throws SQLException {
String structName = null,
distinctName = null,
javaName = null;
// create a vector of class DataType initialized with
// the SQL code, the SQL type name, and two null entries
// for the local type name and the creation parameter(s)
Vector dataTypes = new Vector();
dataTypes.add(new DataType(java.sql.Types.BIT, "BIT"));
dataTypes.add(new DataType(java.sql.Types.TINYINT, "TINYINT"));
dataTypes.add(new DataType(java.sql.Types.SMALLINT, "SMALLINT"));
dataTypes.add(new DataType(java.sql.Types.INTEGER, "INTEGER"));
dataTypes.add(new DataType(java.sql.Types.BIGINT, "BIGINT"));
dataTypes.add(new DataType(java.sql.Types.FLOAT, "FLOAT"));
dataTypes.add(new DataType(java.sql.Types.REAL, "REAL"));
dataTypes.add(new DataType(java.sql.Types.DOUBLE, "DOUBLE"));
dataTypes.add(new DataType(java.sql.Types.NUMERIC, "NUMERIC"));
dataTypes.add(new DataType(java.sql.Types.DECIMAL, "DECIMAL"));
dataTypes.add(new DataType(java.sql.Types.CHAR, "CHAR"));
dataTypes.add(new DataType(java.sql.Types.VARCHAR, "VARCHAR"));
dataTypes.add(new DataType(java.sql.Types.LONGVARCHAR, "LONGVARCHAR"));
dataTypes.add(new DataType(java.sql.Types.DATE, "DATE"));
dataTypes.add(new DataType(java.sql.Types.TIME,"TIME"));
dataTypes.add(new DataType(java.sql.Types.TIMESTAMP, "TIMESTAMP"));
dataTypes.add(new DataType(java.sql.Types.BINARY, "BINARY"));
dataTypes.add(new DataType(java.sql.Types.VARBINARY, "VARBINARY"));
dataTypes.add(new DataType(java.sql.Types.LONGVARBINARY,
"LONGVARBINARY"));
dataTypes.add(new DataType(java.sql.Types.NULL, "NULL"));
dataTypes.add(new DataType(java.sql.Types.OTHER, "OTHER"));
dataTypes.add(new DataType(java.sql.Types.BLOB, "BLOB"));
dataTypes.add(new DataType(java.sql.Types.CLOB, "CLOB"));
DatabaseMetaData dbmd = con.getMetaData();
ResultSet rs = dbmd.getTypeInfo();
while (rs.next()) {
int codeNumber = rs.getInt("DATA_TYPE");
String dbmsName = rs.getString("TYPE_NAME");
String createParams = rs.getString("CREATE_PARAMS");
if ( codeNumber == Types.STRUCT && structName == null )
structName = dbmsName;
else if ( codeNumber == Types.DISTINCT && distinctName == null )
distinctName = dbmsName;
else if ( codeNumber == Types.JAVA_OBJECT && javaName == null )
javaName = dbmsName;
else {
for (int i = 0; i < dataTypes.size(); i++) {
// find entry that matches the SQL code,
// and if local type and params are not already set,
// set them
DataType type = (DataType)dataTypes.get(i);
if (type.getCode() == codeNumber) {
type.setLocalTypeAndParams(dbmsName, createParams);
}
}
}
}
if (typeToCreate.equals("s")) {
int[] types = {Types.STRUCT, Types.DISTINCT, Types.JAVA_OBJECT};
rs = dbmd.getUDTs(null, "%", "%", types);
while (rs.next()) {
String typeName = null;
DataType dataType = null;
if ( dbmd.isCatalogAtStart() )
typeName = rs.getString(1) + dbmd.getCatalogSeparator() +
rs.getString(2) + "." + rs.getString(3);
else
typeName = rs.getString(2) + "." + rs.getString(3) +
dbmd.getCatalogSeparator() + rs.getString(1);
switch (rs.getInt(5)) {
case Types.STRUCT:
dataType = new DataType(Types.STRUCT, typeName);
dataType.setLocalTypeAndParams(structName, null);
break;
case Types.DISTINCT:
dataType = new DataType(Types.DISTINCT, typeName);
dataType.setLocalTypeAndParams(distinctName, null);
break;
case Types.JAVA_OBJECT:
dataType = new DataType(Types.JAVA_OBJECT, typeName);
dataType.setLocalTypeAndParams(javaName, null);
break;
}
dataTypes.add(dataType);
}
}
return dataTypes;
}
private static String getInput(String prompt) throws SQLException {
System.out.print(prompt);
System.out.flush();
try {
java.io.BufferedReader bin;
bin = new java.io.BufferedReader(
new java.io.InputStreamReader(System.in));
String result = bin.readLine();
return result;
} catch(java.io.IOException ex) {
System.out.println("Caught java.io.IOException:");
System.out.println(ex.getMessage());
return "";
}
}
}
Create table: data type
/*
Copyright 2003 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
Use of this software is authorized pursuant to the terms of the license found at
http://developer.java.sun.ru/berkeley_license.html.
Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
- Redistribution of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
- Redistribution 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.
Neither the name of Sun Microsystems, Inc. or the names of contributors may
be used to endorse or promote products derived from this software without
specific prior written permission.
This software is provided "AS IS," without a warranty of any kind.
ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICORSYSTEMS, INC. ("SUN")
AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF
LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN
IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
You acknowledge that this software is not designed, licensed or intended for
use in the design, construction, operation or maintenance of any nuclear
facility.
*/
/*
* Copyright 2003 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
* Use of this software is authorized pursuant to the terms of the license found at
* http://developer.java.sun.ru/berkeley_license.html.
*/
import java.sql.*;
import java.util.*;
public class CreateNewTable {
public static void main(String [] args) {
String url = "jdbc:mySubprotocol:myDataSource";
Connection con;
Statement stmt;
try {
Class.forName("myDriver.ClassName");
} catch(java.lang.ClassNotFoundException e) {
System.err.print("ClassNotFoundException: ");
System.err.println(e.getMessage());
}
try {
con = DriverManager.getConnection(url,
"myLogin", "myPassword");
stmt = con.createStatement();
Vector dataTypes = getDataTypes(con);
String tableName;
String columnName;
String sqlType;
String prompt = "Enter the new table name and hit Return: ";
tableName = getInput(prompt);
String createTableString = "create table " + tableName + " (";
String commaAndSpace = ", ";
boolean firstTime = true;
while (true){
System.out.println("");
prompt = "Enter a column name " +
"(or nothing when finished) \nand hit Return: ";
columnName = getInput(prompt);
if (firstTime) {
if (columnName.length() == 0) {
System.out.print("Need at least one column;");
System.out.println(" please try again");
continue;
} else {
createTableString += columnName + " ";
firstTime = false;
}
} else if (columnName.length() == 0) {
break;
} else {
createTableString += commaAndSpace
+ columnName + " ";
}
String localTypeName = null;
String paramString = "";
while (true) {
System.out.println("");
System.out.println("LIST OF TYPES YOU MAY USE: ");
boolean firstPrinted = true;
int length = 0;
for (int i = 0; i < dataTypes.size(); i++) {
DataType dataType = (DataType)dataTypes.get(i);
if (!dataType.needsToBeSet()) {
if (!firstPrinted)
System.out.print(commaAndSpace);
else
firstPrinted = false;
System.out.print(dataType.getSQLType());
length += dataType.getSQLType().length();
if ( length > 50 ) {
System.out.println("");
length = 0;
firstPrinted = true;
}
}
}
System.out.println("");
int index;
prompt = "Enter a column type " +
"from the list and hit Return: ";
sqlType = getInput(prompt);
for (index = 0; index < dataTypes.size(); index++) {
DataType dataType = (DataType)dataTypes.get(index);
if (dataType.getSQLType().equalsIgnoreCase(
sqlType) &&
!dataType.needsToBeSet()) {
break;
}
}
localTypeName = null;
paramString = "";
if (index < dataTypes.size()) { // there was a match
String params;
DataType dataType = (DataType)dataTypes.get(index);
params = dataType.getParams();
localTypeName = dataType.getLocalType();
if (params != null) {
prompt = "Enter " + params + ": ";
paramString = "(" + getInput(prompt) + ")";
}
break;
}
else { // use the name as given
prompt = "Are you sure? " +
"Enter "y" or "n" and hit Return: ";
String check = getInput(prompt) + " ";
check = check.toLowerCase().substring(0,1);
if (check.equals("n"))
continue;
else {
localTypeName = sqlType;
break;
}
}
}
createTableString += localTypeName + paramString;
}
createTableString += ")";
System.out.println("");
System.out.print("Your CREATE TABLE statement as ");
System.out.println("sent to your DBMS: ");
System.out.println(createTableString);
System.out.println("");
stmt.executeUpdate(createTableString);
stmt.close();
con.close();
} catch(SQLException ex) {
System.err.println("SQLException: " + ex.getMessage());
}
}
private static Vector getDataTypes(Connection con) throws SQLException {
String structName = null,
distinctName = null,
javaName = null;
// create a vector of class DataType initialized with
// the SQL code, the SQL type name, and two null entries
// for the local type name and the creation parameter(s)
Vector dataTypes = new Vector();
dataTypes.add(new DataType(java.sql.Types.BIT, "BIT"));
dataTypes.add(new DataType(java.sql.Types.TINYINT, "TINYINT"));
dataTypes.add(new DataType(java.sql.Types.SMALLINT, "SMALLINT"));
dataTypes.add(new DataType(java.sql.Types.INTEGER, "INTEGER"));
dataTypes.add(new DataType(java.sql.Types.BIGINT, "BIGINT"));
dataTypes.add(new DataType(java.sql.Types.FLOAT, "FLOAT"));
dataTypes.add(new DataType(java.sql.Types.REAL, "REAL"));
dataTypes.add(new DataType(java.sql.Types.DOUBLE, "DOUBLE"));
dataTypes.add(new DataType(java.sql.Types.NUMERIC, "NUMERIC"));
dataTypes.add(new DataType(java.sql.Types.DECIMAL, "DECIMAL"));
dataTypes.add(new DataType(java.sql.Types.CHAR, "CHAR"));
dataTypes.add(new DataType(java.sql.Types.VARCHAR, "VARCHAR"));
dataTypes.add(new DataType(java.sql.Types.LONGVARCHAR, "LONGVARCHAR"));
dataTypes.add(new DataType(java.sql.Types.DATE, "DATE"));
dataTypes.add(new DataType(java.sql.Types.TIME,"TIME"));
dataTypes.add(new DataType(java.sql.Types.TIMESTAMP, "TIMESTAMP"));
dataTypes.add(new DataType(java.sql.Types.BINARY, "BINARY"));
dataTypes.add(new DataType(java.sql.Types.VARBINARY, "VARBINARY"));
dataTypes.add(new DataType(java.sql.Types.LONGVARBINARY,
"LONGVARBINARY"));
dataTypes.add(new DataType(java.sql.Types.NULL, "NULL"));
dataTypes.add(new DataType(java.sql.Types.OTHER, "OTHER"));
dataTypes.add(new DataType(java.sql.Types.BLOB, "BLOB"));
dataTypes.add(new DataType(java.sql.Types.CLOB, "CLOB"));
DatabaseMetaData dbmd = con.getMetaData();
ResultSet rs = dbmd.getTypeInfo();
while (rs.next()) {
int codeNumber = rs.getInt("DATA_TYPE");
String dbmsName = rs.getString("TYPE_NAME");
String createParams = rs.getString("CREATE_PARAMS");
if ( codeNumber == Types.STRUCT && structName == null )
structName = dbmsName;
else if ( codeNumber == Types.DISTINCT && distinctName == null )
distinctName = dbmsName;
else if ( codeNumber == Types.JAVA_OBJECT && javaName == null )
javaName = dbmsName;
else {
for (int i = 0; i < dataTypes.size(); i++) {
// find entry that matches the SQL code,
// and if local type and params are not already set,
// set them
DataType type = (DataType)dataTypes.get(i);
if (type.getCode() == codeNumber) {
type.setLocalTypeAndParams(dbmsName, createParams);
}
}
}
}
int[] types = {Types.STRUCT, Types.DISTINCT, Types.JAVA_OBJECT};
rs = dbmd.getUDTs(null, "%", "%", types);
while (rs.next()) {
String typeName = null;
DataType dataType = null;
if ( dbmd.isCatalogAtStart() )
typeName = rs.getString(1) + dbmd.getCatalogSeparator() +
rs.getString(2) + "." + rs.getString(3);
else
typeName = rs.getString(2) + "." + rs.getString(3) +
dbmd.getCatalogSeparator() + rs.getString(1);
switch (rs.getInt(5)) {
case Types.STRUCT:
dataType = new DataType(Types.STRUCT, typeName);
dataType.setLocalTypeAndParams(structName, null);
break;
case Types.DISTINCT:
dataType = new DataType(Types.DISTINCT, typeName);
dataType.setLocalTypeAndParams(distinctName, null);
break;
case Types.JAVA_OBJECT:
dataType = new DataType(Types.JAVA_OBJECT, typeName);
dataType.setLocalTypeAndParams(javaName, null);
break;
}
dataTypes.add(dataType);
}
return dataTypes;
}
private static String getInput(String prompt) throws SQLException {
System.out.print(prompt);
System.out.flush();
try {
java.io.BufferedReader bin;
bin = new java.io.BufferedReader(
new java.io.InputStreamReader(System.in));
String result = bin.readLine();
return result;
} catch(java.io.IOException ex) {
System.out.println("Caught java.io.IOException:");
System.out.println(ex.getMessage());
return "";
}
}
}
class DataType {
private int code;
private String SQLType;
private String localType = null;
private String params = null;
private boolean needsSetting = true;
public DataType(int code, String SQLType) {
this.code = code;
this.SQLType = SQLType;
}
public boolean needsToBeSet() {
return needsSetting;
}
public int getCode() {
return code;
}
public String getSQLType() {
return SQLType;
}
public String getLocalType() {
return localType;
}
public String getParams() {
return params;
}
public void setLocalTypeAndParams(String local, String p) {
if (needsSetting) {
localType = local;
params = p;
needsSetting = false;
}
}
}
Following up on the javadoc for java.sql.Connection, make a TypeMap
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.ru/, 1996-2002. All rights
* reserved. Software written by Ian F. Darwin and others. $Id: LICENSE,v 1.8
* 2004/02/09 03:33:38 ian Exp $
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS"" AND ANY
* EXPRESS 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 AUTHOR OR 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.
*
* Java, the Duke mascot, and all variants of Sun"s Java "steaming coffee cup"
* logo are trademarks of Sun Microsystems. Sun"s, and James Gosling"s,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import java.io.FileInputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Map;
import java.util.Properties;
/*
* Following up on the javadoc for java.sql.Connection, make a TypeMap that maps
* a *structured* UDT into a MusicRecording "automatically". @author Ian Darwin
*/
public class TypeMapDemo {
public static void main(String[] args) throws IOException,
ClassNotFoundException, SQLException {
Properties p = new Properties();
p.load(new FileInputStream("db.properties"));
Class c = Class.forName(p.getProperty("db.driver"));
System.out.println("Loaded driverClass " + c.getName());
Connection con = DriverManager.getConnection(p.getProperty("db.url"),
"student", "student");
System.out.println("Got Connection " + con);
Statement s = con.createStatement();
int ret;
try {
s.executeUpdate("drop table MR");
s.executeUpdate("drop type MUSICRECORDING");
} catch (SQLException andDoNothingWithIt) {
// Should use "if defined" but not sure it works for UDTs...
}
ret = s.executeUpdate("create type MUSICRECORDING as object ("
+ " id integer," + " title varchar(20), "
+ " artist varchar(20) " + ")");
System.out.println("Created TYPE! Ret=" + ret);
ret = s.executeUpdate("create table MR of MUSICRECORDING");
System.out.println("Created TABLE! Ret=" + ret);
int nRows = s
.executeUpdate("insert into MR values(123, "Greatest Hits", "Ian")");
System.out.println("inserted " + nRows + " rows");
// Put the data class into the connection"s Type Map
// If the data class were not an inner class,
// this would likely be done with Class.forName(...);
Map map = con.getTypeMap();
map.put("MUSICRECORDING", MusicRecording.class);
con.setTypeMap(map);
ResultSet rs = s.executeQuery("select * from MR where id = 123");
//"select musicrecording(id,artist,title) from mr");
rs.next();
for (int i = 1; i <= rs.getMetaData().getColumnCount(); i++) {
Object o = rs.getObject(i);
System.out.print(o + "(Type " + o.getClass().getName() + ")\t");
}
System.out.println();
}
/**
* Simplified local copy of MusicRecording, so this pgm can stand alone.
* This is an inner class just for illustrative purposes; it would normally
* be an unrelated data class.
*/
public class MusicRecording {
int id;
String title;
String artist;
public String toString() {
return "MusicRecording#" + id + "[" + artist + "--" + title + "]";
}
}
}
//File: db.properties
/*
# JDBC Properties for various connections.
# DEFAULT
default.db.driver=oracle.jdbc.driver.OracleDriver
default.db.url=jdbc:oracle:thin:@server:1521:db570
default.db.user=student
default.db.password=student
# RainForest: Connection information for the Oracle database on the server
rain.oracle.db.driver=oracle.jdbc.driver.OracleDriver
rain.oracle.db.url=jdbc:oracle:thin:@server:1521:db570
rain.oracle.db.user=student
rain.oracle.db.password=student
# RainForest: Connection for the Access database on the local machine
rain.access.db.driver=sun.jdbc.odbc.JdbcOdbcDriver
rain.access.db.url=jdbc:odbc:RainForestDSN
rain.access.db.user=student
rain.access.db.password=student
*/
