/**************************************************************************************
* Copyright (C) 2008 EsperTech, Inc. All rights reserved. *
* http://esper.codehaus.org *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
**************************************************************************************/
package com.espertech.esper.util;
import java.io.Serializable;
import java.text.Collator;
import java.util.Comparator;
/**
* A comparator on objects that takes a boolean array for ascending/descending.
*/
public final class ObjectCollatingComparator implements Comparator<Object>, MetaDefItem, Serializable
{
private static final long serialVersionUID = 2147404623473097358L;
private final boolean isDescendingValue;
private transient Collator collator = null;
/**
* Ctor.
* @param isDescendingValue ascending or descending
*/
public ObjectCollatingComparator(boolean isDescendingValue)
{
this.isDescendingValue = isDescendingValue;
collator = Collator.getInstance();
}
public final int compare(Object firstValue, Object secondValue)
{
return MultiKeyComparator.compareValuesCollated(firstValue, secondValue, isDescendingValue, collator);
}
}