/**
* Copyright 1999-2009 The Pegadi Team
*
* 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.pegadi.articlelist;
// pegadi-imports
import java.util.Comparator;
/**
* A generic three-layer @link{Comparator} for comparing/sorting
* articles by various parameters (ArticleType, Publication,
* Journalist, Characters, etc...)
*
* @author <a href="mailto:jb@underdusken.no">Jørgen Binningsbø</a>
* @version $Id$
* @see Comparator
*/
public class GenericComparator implements Comparator {
Comparator comparator1;
Comparator comparator2;
Comparator comparator3;
public GenericComparator(Comparator comparator1, Comparator
comparator2, Comparator comparator3) {
initialize(comparator1, comparator2, comparator3);
}
public GenericComparator(Comparator comparator1, Comparator
comparator2) {
initialize(comparator1, comparator2, null);
}
public GenericComparator(Comparator comparator1) {
initialize(comparator1, null, null);
}
protected void initialize(Comparator comparator1, Comparator
comparator2, Comparator comparator3) {
this.comparator1 = comparator1;
this.comparator2 = comparator2;
this.comparator3 = comparator3;
}
public int compare(Object o1, Object o2) {
int lastCmp = comparator1.compare(o1, o2);
if (lastCmp == 0 & comparator2 != null) {
lastCmp = comparator2.compare(o1, o2);
if (lastCmp == 0 & comparator3 != null) {
lastCmp = comparator3.compare(o1, o2);
}
}
return lastCmp;
}
}