/*
 *    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.Filter;
import org.opengis.filter.FilterVisitor;
import org.opengis.filter.Not;
/**
 * @author jdeolive
 *
 *
 * @source $URL$
 */
public class NotImpl extends LogicFilterImpl implements Not {
	
	protected NotImpl(org.opengis.filter.FilterFactory factory) {
		super(factory);
		
		//backwards compatability with old type system
		filterType = LOGIC_NOT;
	}
	
	protected NotImpl(org.opengis.filter.FilterFactory factory, Filter filter) {
		super(factory);
		this.children.add(filter);
		
		//backwards compatability with old type system
		filterType = LOGIC_NOT;
	}

	public Filter getFilter() {
		return (Filter)children.get(0);
	}

	public void setFilter(Filter filter) {
		if (children.isEmpty()) {
			children.add(filter);
		}
		else {
			children.set(0,filter);
		}
	}
	
	//@Override
	public boolean evaluate(Object feature) {
		return !getFilter().evaluate(feature);
	}
	
	public Object accept(FilterVisitor visitor, Object extraData) {
		return visitor.visit(this,extraData);
	}

}