/*
* Geotoolkit - An Open Source Java GIS Toolkit
* http://www.geotoolkit.org
*
* (C) 2011, Geomatys
*
* 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.geotoolkit.processing.jts.buffer;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryFactory;
import java.util.Collections;
import org.geotoolkit.geometry.jts.JTS;
import org.geotoolkit.processing.AbstractProcess;
import org.geotoolkit.process.ProcessException;
import org.opengis.parameter.ParameterValueGroup;
import org.opengis.referencing.NoSuchAuthorityCodeException;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.util.FactoryException;
import static org.geotoolkit.processing.jts.buffer.BufferDescriptor.*;
import static org.geotoolkit.parameter.Parameters.*;
/**
* Compute a buffer around a geometry.
* The buffer geometry keep the input geometry CRS.
* @author Quentin Boileau (Geomatys)
* @module
*/
public class BufferProcess extends AbstractProcess {
public BufferProcess(final ParameterValueGroup input) {
super(INSTANCE,input);
}
@Override
protected void execute() throws ProcessException {
try {
final Geometry geom = value(GEOM, inputParameters);
final double distance = value(DISTANCE, inputParameters);
int segments = 0;
if(value(SEGMENTS, inputParameters) != null) {
segments = value(SEGMENTS, inputParameters);
}
int endStyle = 2;
if(value(ENDSTYLE, inputParameters) != null) {
endStyle = value(ENDSTYLE, inputParameters);
}
final CoordinateReferenceSystem geomCRS = JTS.findCoordinateReferenceSystem(geom);
Geometry result = new GeometryFactory().buildGeometry(Collections.EMPTY_LIST);
if (segments > 0) {
if (endStyle != 0) {
result = geom.buffer(distance, segments, endStyle);
} else {
result = geom.buffer(distance, segments);
}
} else {
result = geom.buffer(distance);
}
JTS.setCRS(result, geomCRS);
getOrCreate(RESULT_GEOM, outputParameters).setValue(result);
} catch (NoSuchAuthorityCodeException ex) {
throw new ProcessException(ex.getMessage(), this, ex);
} catch (FactoryException ex) {
throw new ProcessException(ex.getMessage(), this, ex);
}
}
}