/*
* 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.spatial;
import org.geotools.filter.CartesianDistanceFilter;
import org.geotools.filter.FilterFactory;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.filter.FilterVisitor;
import org.opengis.filter.expression.Expression;
import org.opengis.filter.spatial.DWithin;
import com.vividsolutions.jts.geom.Geometry;
public class DWithinImpl extends CartesianDistanceFilter implements DWithin {
public DWithinImpl(org.opengis.filter.FilterFactory factory,Expression e1,Expression e2) {
super(factory,e1,e2);
// backwards compat with old type system
this.filterType = GEOMETRY_DWITHIN;
}
public boolean evaluate(Object feature) {
if (feature instanceof SimpleFeature && !validate((SimpleFeature)feature))
return false;
Geometry left = getLeftGeometry(feature);
Geometry right = getRightGeometry(feature);
return left.isWithinDistance(right, getDistance());
}
public Object accept(FilterVisitor visitor, Object extraData) {
return visitor.visit(this,extraData);
}
}