- /*
- * Copyright 2003-2004 The Apache Software Foundation
- *
- * Licensed 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;
- } else {
- return 0;
- }
- } else {
- return (o1.equals(o2)) ? 0 : 1;
- }
- }
-
- /**
- * Override Object.toString().
- * @return information about this comparator
- */
- public String toString() {
- return "EqualComparator";
- }
- }