001/*
002 * Licensed under the Apache License, Version 2.0 (the "License");
003 * you may not use this file except in compliance with the License.
004 * You may obtain a copy of the License at
005 *
006 *     http://www.apache.org/licenses/LICENSE-2.0
007 *
008 * Unless required by applicable law or agreed to in writing, software
009 * distributed under the License is distributed on an "AS IS" BASIS,
010 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
011 * See the License for the specific language governing permissions and
012 * limitations under the License.
013 */
014package org.gbif.utils.text;
015
016import java.util.Comparator;
017
018/**
019 * A comparator based around Javas String.compareTo().
020 */
021public class StringComparator implements Comparator<String> {
022
023  @Override
024  public int compare(String arg0, String arg1) {
025    if (arg0 == null && arg1 == null) {
026      return 0;
027    } else if (arg0 == null) {
028      return 1;
029    } else if (arg1 == null) {
030      return -1;
031    }
032    return arg0.compareTo(arg1);
033  }
034}