/*
* $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/cookie/CookiePathComparator.java $
* $Revision: 653041 $
* $Date: 2008-05-03 03:39:28 -0700 (Sat, 03 May 2008) $
*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.http.cookie;
import java.io.Serializable;
import java.util.Comparator;
/**
* This cookie comparator ensures that multiple cookies satisfying
* a common criteria are ordered in the <tt>Cookie</tt> header such
* that those with more specific Path attributes precede those with
* less specific.
*
* <p>
* This comparator assumes that Path attributes of two cookies
* path-match a commmon request-URI. Otherwise, the result of the
* comparison is undefined.
* </p>
*
* @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
*/
public class CookiePathComparator implements Serializable, Comparator<Cookie> {
private static final long serialVersionUID = 7523645369616405818L;
private String normalizePath(final Cookie cookie) {
String path = cookie.getPath();
if (path == null) {
path = "/";
}
if (!path.endsWith("/")) {
path = path + '/';
}
return path;
}
public int compare(final Cookie c1, final Cookie c2) {
String path1 = normalizePath(c1);
String path2 = normalizePath(c2);
if (path1.equals(path2)) {
return 0;
} else if (path1.startsWith(path2)) {
return -1;
} else if (path2.startsWith(path1)) {
return 1;
} else {
// Does not really matter
return 0;
}
}
}