/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 * 
 *    (C) 2006-2008, Open Source Geospatial Foundation (OSGeo)
 *        
 *    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;
 *    version 2.1 of the License.
 *
 *    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.
 */
package org.geotools.filter;

import org.opengis.filter.FilterVisitor;
import org.opengis.filter.PropertyIsGreaterThan;
import org.opengis.filter.expression.Expression;
/**
 * @author jdeolive
 *
 *
 * @source $URL$
 */
public class IsGreaterThanImpl extends MultiCompareFilterImpl implements PropertyIsGreaterThan {

	protected IsGreaterThanImpl(org.opengis.filter.FilterFactory factory) {
		this(factory,null,null);
	}
	
	protected IsGreaterThanImpl(org.opengis.filter.FilterFactory factory, Expression expression1, Expression expression2) {
		super(factory, expression1, expression2);
		
		//backwards compat with old type system
		this.filterType = COMPARE_GREATER_THAN;
	}
	
        protected IsGreaterThanImpl(org.opengis.filter.FilterFactory factory, Expression expression1,
                Expression expression2, MatchAction matchAction) {
            super(factory, expression1, expression2, matchAction);
    
            // backwards compat with old type system
            this.filterType = COMPARE_GREATER_THAN;
        }

	@Override
	public boolean evaluateInternal(Object v1, Object v2) {
		Object[] values = eval( v1, v2 );
		Comparable value1 = comparable( values[0] );
		Comparable value2 = comparable( values[1] );
		
		return value1 != null && value2 != null && compare(value1,value2) > 0;
	}
	
	public Object accept(FilterVisitor visitor, Object extraData) {
		return visitor.visit(this,extraData);
	}
}