/*
* #!
* Ontopia Engine
* #-
* Copyright (C) 2001 - 2013 The Ontopia Project
* #-
* 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 net.ontopia.topicmaps.utils;
import java.util.Comparator;
import net.ontopia.topicmaps.core.TMObjectIF;
/**
* INTERNAL: Comparator that compares object ids of TMObjectIF objects.
*/
public class ObjectIdComparator implements Comparator<TMObjectIF> {
public static final ObjectIdComparator INSTANCE = new ObjectIdComparator();
/**
* INTERNAL: compares the object ids of the given objects
*
* @param obj1 TMObjectIF
* @param obj2 TMObjectIF
* @return int; 0 if the two objects have the same object id; otherwise positive/negative
* according to compareTo on the (string) values of the object ids
*/
public int compare(TMObjectIF obj1, TMObjectIF obj2) {
return obj1.getObjectId().compareTo(obj2.getObjectId());
}
}