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2010-05-31T18:01:44Z

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== Immutable object representing a single browser cookie ==



<source lang="java">

/*
* Copyright 2006 Robert Hanson <iamroberthanson AT gmail.ru>
*
* 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.
*/
package org.gwtwidgets.client.util;
import java.util.Date;

/**
* Immutable object representing a single browser cookie.
*
* @author Brian Glick
*/
public class Cookie
{
private String name;
private String value;

Cookie (String name, String value)
{
super();
this.name = name;
this.value = value;
}
/**
* Gets the name of the cookie
* @return
*/
public String getName ()
{
return name;
}
/**
* Get"s the cookie"s value
* @return
*/
public String getValue ()
{
return value;
}
public void write (Date expires)
{
CookieUtils.write(this, expires);
}
}
/////////////////////////////////
/*
* Copyright 2006 Robert Hanson <iamroberthanson AT gmail.ru>
*
* 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.
*/
package org.gwtwidgets.client.util;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* Class that is responsible for reading and writing cookies.
*
* @author Brian Glick
* @author rhanson
*/
public class CookieUtils {
/**
* Creates, sets, and returns the Cookie object
* @param name
* @param value
* @param expires
* @param path
* @return the Cookie created or reset
*/
public static Cookie write (String name, String value, Date expires, String path)
{
boolean useExp = false;
int year = -1, month = -1, day = -1;
if (expires != null) {
useExp = true;
year = expires.getYear() + 1900;
month = expires.getMonth();
day = expires.getDate();
}
writeNative(name, value, useExp, year, month, day, path);
return new Cookie(name, value);
}
public static Cookie write (String name, String value, Date expires)
{
return write(name, value, expires, "/");
}

private static void writeNative(String name, String value, boolean useExpires, int year, int month, int day)
{
writeNative(name, value, useExpires, year, month, day, "/");
}
private static native void writeNative(String name, String value, boolean useExpires, int year, int month, int day, String path) /*-{
var expStr = (useExpires) ? "; expires=" + new Date(year, month, day).toGMTString() : "";
$doc.cookie = name + "=" + escape(value) + expStr + "; path=" + path;
}-*/;

/**
* Erases cookie with given name.
* @param name
*/
public static void erase (String name)
{
writeNative(name, "", true, 1970, 1, 1);
}
/**
* Gets the value of the cookie with the given name.
* @param name Name of cookie whose value should be retrieved
* @return Cookie value or null if cookie is not found
*/
public static String readValue (String name)
{
Cookie c = read(name);
return c == null ? null : c.getValue();
}

/**
* Gets the cookie with the given name.
* @param name Name of cookie to get.
* @return Cookie or null if the cookie is not found.
*/
public static Cookie read (String name)
{
String val = getValue(name);
return (val == null) ? null : new Cookie(name, val);
}
/**
* Tries to load the cookie, but only sets fields if they are found
* @param name
* @param c
*/
private static native String getValue (String name) /*-{
var start = $doc.cookie.indexOf(name + "=");
var len = start + name.length + 1;
if ((!start) && (name != $doc.cookie.substring(0,name.length))) {
return null;
}
if (start == -1) {
return null;
}
var end = document.cookie.indexOf(";",len);
if (end == -1) {
end = $doc.cookie.length;
}
return unescape($doc.cookie.substring(len,end));
}-*/;

/**
* Erase the given cookie
* @param c
*/
public static void erase (Cookie c)
{
erase(c.getName());
}

/**
* Write the given cookie
* @param c
*/
public static void write (Cookie c, Date expires)
{
write(c.getName(), c.getValue(), expires);
}
public static Cookie[] getAll ()
{
Map cookies = getCookieMap();
Cookie[] rVal = new Cookie[cookies.size()];
int counter = 0;
for (Iterator i = cookies.keySet().iterator(); i.hasNext(); counter++) {
String name = (String) i.next();
rVal[counter] = new Cookie(name, (String) cookies.get(name));
}
return rVal;
}
private static Map getCookieMap ()
{
Map jar = new HashMap();
fillCookieJar(jar);
return jar;
}

private static native void fillCookieJar (Map jar) /*-{
var cookies = $doc.cookie;
if (cookies && cookies != "") {
var cl = cookies.split("; ");
for (var i = 0; i < cl.length; ++i) {
var parts = cl[i].split("=");
jar.@java.util.Map::put(Ljava/lang/Object;Ljava/lang/Object;)(parts[0], unescape(parts[1]));
}
}
}-*/;
}

</source>

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Admin: 1 версия

в 18:01, 31 мая 2010