/*
Wotonomy: OpenStep design patterns for pure Java applications.
Copyright (C) 2002 Israfil consulting Services Corporation

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see http://www.gnu.org

$Id: NSComparator.java 913 2006-03-10 00:52:27Z cgruber $

*/

package net.wotonomy.foundation;

import java.util.Comparator;


/**
* An object that compares two other objects.  As a convenience, it 
* also implements java.util.Comparator.
*
* @author cgruber@israfil.net
* @author $Author: cgruber $
* @version $Revision: 913 $
*/

public abstract class NSComparator implements Comparator {
    protected static class _NSSelectorComparator extends NSComparator {

        public int compare(Object obj, Object obj1) throws ComparisonException {
			throw new UnsupportedOperationException("Not Yet Implemented");
        }

        public _NSSelectorComparator(NSSelector nsselector) {
			throw new UnsupportedOperationException("Not Yet Implemented");
        }
    }
    
    private static class StandInComparator extends NSComparator {

    	public StandInComparator() {
			throw new UnsupportedOperationException("Not Yet Implemented");    		
    	}

        public int compare(Object obj, Object obj1) throws ComparisonException {
			throw new UnsupportedOperationException("Not Yet Implemented");
        }    	

    }

    public static class ComparisonException extends ClassCastException {

        public ComparisonException(String s) {
            super(s);
        }
    }


    public static final NSComparator AscendingStringComparator = new StandInComparator();
    public static final NSComparator DescendingStringComparator = new StandInComparator();
    public static final NSComparator AscendingCaseInsensitiveStringComparator = new StandInComparator();
    public static final NSComparator DescendingCaseInsensitiveStringComparator = new StandInComparator();
    public static final NSComparator AscendingNumberComparator = new StandInComparator();
    public static final NSComparator DescendingNumberComparator = new StandInComparator();
    public static final NSComparator AscendingTimestampComparator = new StandInComparator();
    public static final NSComparator DescendingTimestampComparator = new StandInComparator();
    public static final int OrderedAscending = -1;
    public static final int OrderedSame = 0;
    public static final int OrderedDescending = 1;

    public NSComparator() {
    }

    public abstract int compare(Object obj, Object obj1) throws ClassCastException;

    public static int _compareObjects(Comparable comparable, Comparable comparable1) {
		throw new UnsupportedOperationException("Not Yet Implemented");
    }

}
/*
 * $Log$
 * Revision 1.2  2006/03/10 00:52:27  cgruber
 * Add tests for NSArray and fix some problems that became obvious as a result.
 *
 * Revision 1.1  2006/02/16 12:47:16  cgruber
 * Check in all sources in eclipse-friendly maven-enabled packages.
 *
 * Revision 1.1  2002/07/14 21:56:16  mpowers
 * Contributions from cgruber.
 *
 * Revision 1.1  2002/06/25 07:52:56  cgruber
 * Add quite a few abstract classes, interfaces, and classes.  All API consistent with WebObjects, but with no implementation, nor any private or package access members from the original.
 *
 */