/* Copyright (c) 2001 - 2007 TOPP - www.openplans.org. All rights reserved.
* This code is licensed under the GPL 2.0 license, available at the root
* application directory.
*/
package org.geoserver.wps.gs;
import java.io.IOException;
import org.geoserver.wps.jts.DescribeParameter;
import org.geoserver.wps.jts.DescribeProcess;
import org.geoserver.wps.jts.DescribeResult;
import org.geotools.feature.FeatureCollection;
import org.geotools.feature.FeatureIterator;
import org.geotools.geometry.jts.GeometryCollector;
import org.opengis.util.ProgressListener;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryCollection;
/**
* Collects all geometries from the specified vector layer into a single GeometryCollection (or
* specialized subclass of it in case the geometries are uniform)
*
* @author Andrea Aime - GeoSolutions
*/
@DescribeProcess(title = "collectGeometries", description = "Collects all the default geometries in the feature collection and returns them as a single geometry collection")
public class CollectGeometries implements GeoServerProcess {
@DescribeResult(name = "result", description = "The reprojected features")
public GeometryCollection execute(
@DescribeParameter(name = "features", description = "The feature collection whose geometries will be collected") FeatureCollection features,
ProgressListener progressListener) throws IOException {
int count = features.size();
float done = 0;
FeatureIterator fi = null;
GeometryCollector collector = new GeometryCollector();
try {
fi = features.features();
while(fi.hasNext()) {
Geometry g = (Geometry) fi.next().getDefaultGeometryProperty().getValue();
collector.add(g);
// progress notification
done++;
if (progressListener != null && done % 100 == 0) {
progressListener.progress(done / count);
}
}
} finally {
if (fi != null) {
fi.close();
}
}
return collector.collect();
}
}