/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2007-2011, 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.feature.Attribute;
/**
*
*
* @source $URL$
*/
public class IDFunctionExpression extends FunctionExpressionImpl {
public IDFunctionExpression() {
super("getID");
}
public Object evaluate(Object obj) {
if (obj instanceof Attribute) {
Attribute att = (Attribute) obj;
return att.getIdentifier();
}
return null;
}
}