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1   /*
2    * Copyright 2009 Red Hat, Inc.
3    *
4    * Red Hat licenses this file to you under the Apache License, version 2.0
5    * (the "License"); you may not use this file except in compliance with the
6    * License.  You may obtain a copy of the License at:
7    *
8    *    http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package org.jboss.netty.handler.codec.http;
17  
18  import java.io.Serializable;
19  import java.util.Comparator;
20  
21  /**
22   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
23   * @author Andy Taylor (andy.taylor@jboss.org)
24   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
25   * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
26   */
27  final class CaseIgnoringComparator implements Comparator<String>, Serializable {
28  
29      private static final long serialVersionUID = 4582133183775373862L;
30  
31      static final CaseIgnoringComparator INSTANCE = new CaseIgnoringComparator();
32  
33      private CaseIgnoringComparator() {
34          super();
35      }
36  
37      public int compare(String o1, String o2) {
38          return o1.compareToIgnoreCase(o2);
39      }
40  
41      private Object readResolve() {
42          return INSTANCE;
43      }
44  }