001/*
002 * CDDL HEADER START
003 *
004 * The contents of this file are subject to the terms of the
005 * Common Development and Distribution License, Version 1.0 only
006 * (the "License").  You may not use this file except in compliance
007 * with the License.
008 *
009 * You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
010 * or http://forgerock.org/license/CDDLv1.0.html.
011 * See the License for the specific language governing permissions
012 * and limitations under the License.
013 *
014 * When distributing Covered Code, include this CDDL HEADER in each
015 * file and include the License file at legal-notices/CDDLv1_0.txt.
016 * If applicable, add the following below this CDDL HEADER, with the
017 * fields enclosed by brackets "[]" replaced with your own identifying
018 * information:
019 *      Portions Copyright [yyyy] [name of copyright owner]
020 *
021 * CDDL HEADER END
022 *
023 *
024 *      Copyright 2008 Sun Microsystems, Inc.
025 *      Portions Copyright 2015 ForgeRock AS.
026 */
027
028package org.opends.guitools.controlpanel.util;
029
030import java.util.Comparator;
031
032/**
033 * Class used to compare Strings without taking into account the case.
034 * It can be used to sort Strings in TreeSets for instance.
035 */
036public class LowerCaseComparator implements Comparator<String>
037{
038  /** {@inheritDoc} */
039  public int compare(String s1, String s2)
040  {
041    if (s1 != null && s2 != null)
042    {
043      return s1.toLowerCase().compareTo(s2.toLowerCase());
044    }
045    else if (s2 != null)
046    {
047      return -1;
048    }
049    else if (s1 != null)
050    {
051      return 1;
052    }
053    else
054    {
055      return 0;
056    }
057  }
058}