/* (c) 2014 Open Source Geospatial Foundation - all rights reserved
* (c) 2001 - 2013 OpenPlans
* This code is licensed under the GPL 2.0 license, available at the root
* application directory.
*/
package org.geoserver.wms.featureinfo;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Collections;
import java.util.Iterator;
import net.opengis.wfs.FeatureCollectionType;
import net.opengis.wfs.GetFeatureType;
import net.opengis.wfs.QueryType;
import net.opengis.wfs.WfsFactory;
import org.geoserver.config.GeoServer;
import org.geoserver.platform.Operation;
import org.geoserver.platform.Service;
import org.geoserver.platform.ServiceException;
import org.geoserver.wfs.xml.GML2OutputFormat;
import org.geoserver.wms.GetFeatureInfoRequest;
import org.geoserver.wms.WMS;
import org.geotools.data.simple.SimpleFeatureCollection;
import org.geotools.feature.FeatureCollection;
import org.geotools.gml2.bindings.GML2EncodingUtils;
/**
* A GetFeatureInfo response handler specialized in producing GML data for a GetFeatureInfo request.
*
* <p>
* This class does not deals directly with GML encoding. Instead, it works by taking the
* FeatureResults produced in <code>execute()</code> and constructs a <code>GetFeaturesResult</code>
* wich is passed to a <code>GML2FeatureResponseDelegate</code>, as if it where the result of a
* GetFeature WFS request.
* </p>
*
* @author Gabriel Roldan
*/
public class GML2FeatureInfoOutputFormat extends GetFeatureInfoOutputFormat {
/**
* The MIME type of the format this response produces: <code>"application/vnd.ogc.gml"</code>
*/
public static final String FORMAT = "application/vnd.ogc.gml";
private WMS wms;
/**
* Default constructor, sets up the supported output format string.
*/
public GML2FeatureInfoOutputFormat(final WMS wms) {
super(FORMAT);
this.wms = wms;
}
protected GML2FeatureInfoOutputFormat(WMS wms, String format) {
super(format);
this.wms = wms;
}
/**
* Takes the <code>FeatureResult</code>s generated by the <code>execute</code> method in the
* superclass and constructs a <code>GetFeaturesResult</code> wich is passed to a
* <code>GML2FeatureResponseDelegate</code>.
*
* @see AbstractFeatureInfoResponse#writeTo(OutputStream)
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
@Override
public void write(FeatureCollectionType results, GetFeatureInfoRequest fInfoReq,
OutputStream out) throws ServiceException, IOException {
// the 'response' object we'll pass to our OutputFormat
FeatureCollectionType features = WfsFactory.eINSTANCE.createFeatureCollectionType();
// the 'request' object we'll pass to our OutputFormat
GetFeatureType gfreq = WfsFactory.eINSTANCE.createGetFeatureType();
gfreq.setBaseUrl(fInfoReq.getBaseUrl());
for (Iterator i = results.getFeature().iterator(); i.hasNext();) {
FeatureCollection fc = (FeatureCollection) i.next();
features.getFeature().add(fc);
QueryType qt = WfsFactory.eINSTANCE.createQueryType();
String crs = GML2EncodingUtils.epsgCode(fc.getSchema().getCoordinateReferenceSystem());
if (crs != null) {
final String srsName = "EPSG:" + crs;
try {
qt.setSrsName(new URI(srsName));
} catch (URISyntaxException e) {
throw new ServiceException(
"Unable to determite coordinate system for featureType " +
fc.getSchema().getName() + ". Schema told us '" + srsName + "'", e);
}
}
gfreq.getQuery().add(qt);
}
// this is a dummy wrapper around our 'request' object so that the new Dispatcher will
// accept it.
Service serviceDesc = new Service("wms", null, null, Collections.EMPTY_LIST);
Operation opDescriptor = new Operation("", serviceDesc, null, new Object[] { gfreq });
final GeoServer gs = wms.getGeoServer();
GML2OutputFormat format = new GML2OutputFormat(gs);
format.write(features, out, opDescriptor);
}
}