/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 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.tutorial.process;
import java.util.Map;
import org.geotools.feature.simple.SimpleFeatureTypeBuilder;
import org.geotools.process.feature.FeatureToFeatureProcess;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.feature.type.AttributeDescriptor;
import org.opengis.feature.type.GeometryDescriptor;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.MultiPolygon;
import com.vividsolutions.jts.geom.Polygon;
/**
* Process which buffers an entire feature collection.
*
* @author Justin Deoliveira, OpenGEO
* @since 2.6
*
*
*
* @source $URL$
*/
public class BufferFeatureCollectionProcess extends FeatureToFeatureProcess {
/**
* Constructor
*
* @param factory
*/
public BufferFeatureCollectionProcess(BufferFeatureCollectionFactory factory) {
super(factory);
}
@Override
protected void processFeature(SimpleFeature feature, Map<String, Object> input) throws Exception {
Double buffer = (Double) input.get( BufferFeatureCollectionFactory.BUFFER.key );
Geometry g = (Geometry) feature.getDefaultGeometry();
g = g.buffer( buffer );
if(g instanceof Polygon) {
g = g.getFactory().createMultiPolygon(new Polygon[] {(Polygon) g});
}
feature.setDefaultGeometry( g );
}
@Override
protected SimpleFeatureType getTargetSchema(SimpleFeatureType sourceSchema, Map<String, Object> input) {
SimpleFeatureTypeBuilder tb = new SimpleFeatureTypeBuilder();
for (AttributeDescriptor ad : sourceSchema.getAttributeDescriptors()) {
GeometryDescriptor defaultGeometry = sourceSchema.getGeometryDescriptor();
if(ad == defaultGeometry) {
tb.add(ad.getName().getLocalPart(), MultiPolygon.class, defaultGeometry.getCoordinateReferenceSystem());
} else {
tb.add(ad);
}
}
tb.setName(sourceSchema.getName());
return tb.buildFeatureType();
}
}