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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  }