1 /* 2 * ==================================================================== 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * ==================================================================== 20 * 21 * This software consists of voluntary contributions made by many 22 * individuals on behalf of the Apache Software Foundation. For more 23 * information on the Apache Software Foundation, please see 24 * <http://www.apache.org/>. 25 * 26 */ 27 28 package org.apache.hc.client5.http.cookie; 29 30 import java.io.Serializable; 31 import java.util.Comparator; 32 33 import org.apache.hc.core5.annotation.Contract; 34 import org.apache.hc.core5.annotation.ThreadingBehavior; 35 36 /** 37 * This cookie comparator can be used to compare identity of cookies. 38 * <p> 39 * Cookies are considered identical if their names are equal and 40 * their domain attributes match ignoring case. 41 * </p> 42 * 43 * @since 4.0 44 */ 45 @Contract(threading = ThreadingBehavior.STATELESS) 46 public class CookieIdentityComparator implements Serializable, Comparator<Cookie> { 47 48 /** 49 * Singleton instance. 50 * 51 * @since 5.2 52 */ 53 public static final CookieIdentityComparator INSTANCE = new CookieIdentityComparator(); 54 55 private static final long serialVersionUID = 4466565437490631532L; 56 57 @Override 58 public int compare(final Cookie c1, final Cookie c2) { 59 int res = c1.getName().compareTo(c2.getName()); 60 if (res == 0) { 61 // do not differentiate empty and null domains 62 String d1 = c1.getDomain(); 63 if (d1 == null) { 64 d1 = ""; 65 } 66 String d2 = c2.getDomain(); 67 if (d2 == null) { 68 d2 = ""; 69 } 70 res = d1.compareToIgnoreCase(d2); 71 } 72 if (res == 0) { 73 String p1 = c1.getPath(); 74 if (p1 == null) { 75 p1 = "/"; 76 } 77 String p2 = c2.getPath(); 78 if (p2 == null) { 79 p2 = "/"; 80 } 81 res = p1.compareTo(p2); 82 } 83 return res; 84 } 85 86 }