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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          super();
    29      }
    30
    31      public int compare(String o1, String o2) {
    32          return o1.compareToIgnoreCase(o2);
    33      }
    34
    35      @SuppressWarnings("static-method")
    36      private Object readResolve() {
    37          return INSTANCE;
    38      }
    39  }