/*
* #!
* 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.utils;
import java.util.Comparator;
import java.text.Collator;
/**
* INTERNAL: Comparator that performs a lexical comparison. It calls the
* toString method on the objects and compares the result. It can be
* configured to be case insensitive. It is case sensitive by default.</p>
*/
public class LexicalComparator implements Comparator<Object> {
public final static LexicalComparator CASE_SENSITIVE = new LexicalComparator(true);
public final static LexicalComparator CASE_INSENSITIVE = new LexicalComparator(false);
protected Collator collator;
private LexicalComparator(boolean casesensitive) {
collator = Collator.getInstance();
if (!casesensitive)
collator.setStrength(Collator.SECONDARY);
}
private LexicalComparator(Collator collator) {
this.collator = collator;
}
public int compare(Object obj1, Object obj2) {
return collator.compare(obj1.toString(), obj2.toString());
}
}