package org.orbeon.saxon.sort;



/**
 * A Sortable is an object that can be sorted using the QuickSort method.
 *
 * @author Michael H. Kay
 *
 */

public interface Sortable {

    /**
    * Compare two objects within this Sortable, identified by their position.
    * @return <0 if obj[a]<obj[b], 0 if obj[a]=obj[b], >0 if obj[a]>obj[b]
    */

    public int compare(int a, int b);

    /**
    * Swap two objects within this Sortable, identified by their position.
    */

    public void swap(int a, int b);

}


//
// The contents of this file are subject to the Mozilla Public License Version 1.0 (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.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is Michael H. Kay
//
// Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
//
// Contributor(s): none
//