CookieIdentityComparator.java revision 069490a5ca2fd1988d29daf45d892f47ad665115 
1/*
2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/cookie/CookieIdentityComparator.java $
3 * $Revision: 618308 $
4 * $Date: 2008-02-04 07:51:19 -0800 (Mon, 04 Feb 2008) $
5 *
6 * ====================================================================
7 * Licensed to the Apache Software Foundation (ASF) under one
8 * or more contributor license agreements.  See the NOTICE file
9 * distributed with this work for additional information
10 * regarding copyright ownership.  The ASF licenses this file
11 * to you under the Apache License, Version 2.0 (the
12 * "License"); you may not use this file except in compliance
13 * with the License.  You may obtain a copy of the License at
14 *
15 *   http://www.apache.org/licenses/LICENSE-2.0
16 *
17 * Unless required by applicable law or agreed to in writing,
18 * software distributed under the License is distributed on an
19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 * KIND, either express or implied.  See the License for the
21 * specific language governing permissions and limitations
22 * under the License.
23 * ====================================================================
24 *
25 * This software consists of voluntary contributions made by many
26 * individuals on behalf of the Apache Software Foundation.  For more
27 * information on the Apache Software Foundation, please see
28 * <http://www.apache.org/>.
29 *
30 */
31
32package org.apache.http.cookie;
33
34import java.io.Serializable;
35import java.util.Comparator;
36
37/**
38 * This cookie comparator can be used to compare identity of cookies.
39 *
40 * <p>
41 *  Cookies are considered identical if their names are equal and
42 *  their domain attributes match ignoring case.
43 * </p>
44 *
45 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
46 */
47public class CookieIdentityComparator implements Serializable, Comparator<Cookie> {
48
49    private static final long serialVersionUID = 4466565437490631532L;
50
51    public int compare(final Cookie c1, final Cookie c2) {
52        int res = c1.getName().compareTo(c2.getName());
53        if (res == 0) {
54            // do not differentiate empty and null domains
55            String d1 = c1.getDomain();
56            if (d1 == null) {
57                d1 = "";
58            }
59            String d2 = c2.getDomain();
60            if (d2 == null) {
61                d2 = "";
62            }
63            res = d1.compareToIgnoreCase(d2);
64        }
65        return res;
66    }
67
68}
69