/*
* @(#)$Id: Comparator.java,v 1.11 2001/07/31 22:40:01 Bear Exp $
*
* Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the proprietary information of Sun Microsystems, Inc.
* Use is subject to license terms.
*
*/
package com.sun.msv.datatype.xsd;
/**
* Comparable datatype.
*
* Those datatypes which has order relation must implement this interface.
* RangeFacet uses this interface to do its job.
* It differs from {@link java.util.Comparator} in return value.
*
* @author <a href="mailto:kohsuke.kawaguchi@eng.sun.com">Kohsuke KAWAGUCHI</a>
*/
public interface Comparator {
static final int LESS = -1; // lhs < rhs
static final int EQUAL = 0; // lhs = rhs
static final int GREATER = 1; // lhs > rhs
static final int UNDECIDABLE = 999; // lhs ? rhs
/**
* compare to value types and decides its order relation
*/
int compare( Object o1, Object o2 );
}