| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| package org.apache.tools.ant.types.selectors.modifiedselector; |
| |
| |
| import java.util.Comparator; |
| |
| |
| /** |
| * Simple implementation of Comparator for use in CacheSelector. |
| * compare() returns '0' (should not be selected) if both parameter |
| * are equal otherwise '1' (should be selected). |
| * |
| * @version 2003-09-13 |
| * @since Ant 1.6 |
| */ |
| public class EqualComparator implements Comparator { |
| |
| /** |
| * Implements Comparator.compare(). |
| * @param o1 the first object |
| * @param o2 the second object |
| * @return 0, if both are equal, otherwise 1 |
| */ |
| public int compare(Object o1, Object o2) { |
| if (o1 == null) { |
| if (o2 == null) { |
| return 1; |
| } |
| return 0; |
| } |
| return (o1.equals(o2)) ? 0 : 1; |
| } |
| |
| /** |
| * Override Object.toString(). |
| * @return information about this comparator |
| */ |
| public String toString() { |
| return "EqualComparator"; |
| } |
| } |