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1   /*
2    * Copyright 2012 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the 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.util.internal;
17  
18  import java.io.Serializable;
19  import java.util.Comparator;
20  
21  public final class CaseIgnoringComparator implements Comparator<String>, Serializable {
22  
23      private static final long serialVersionUID = 4582133183775373862L;
24  
25      public static final CaseIgnoringComparator INSTANCE = new CaseIgnoringComparator();
26  
27      private CaseIgnoringComparator() {
28      }
29  
30      public int compare(String o1, String o2) {
31          return o1.compareToIgnoreCase(o2);
32      }
33  
34      @SuppressWarnings("MethodMayBeStatic")
35      private Object readResolve() {
36          return INSTANCE;
37      }
38  }