/* Copyright (c) 2001 - 2007 TOPP - www.openplans.org. All rights reserved.
* This code is licensed under the GPL 2.0 license, availible at the root
* application directory.
*/
package org.vfny.geoserver.wms.responses.featureInfo;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.nio.charset.Charset;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.logging.Level;
import org.geoserver.platform.ServiceException;
import org.geotools.feature.FeatureCollection;
import org.geotools.feature.FeatureIterator;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.feature.type.AttributeDescriptor;
import org.opengis.feature.type.Name;
import com.vividsolutions.jts.geom.Geometry;
/**
* Generates a FeatureInfoResponse of type text. This simply reports the
* attributes of the feature requested as a text string. This class just
* performs the writeTo, the GetFeatureInfoDelegate and abstract feature info
* class handle the rest.
*
* @author James Macgill, PSU
* @version $Id: TextFeatureInfoResponse.java,v 1.3 2004/07/19 22:31:40 jmacgill
* Exp $
*/
public class TextFeatureInfoResponse extends AbstractFeatureInfoResponse {
/**
*
*/
public TextFeatureInfoResponse() {
format = "text/plain";
supportedFormats = Collections.singletonList("text/plain");
}
/**
* Returns any extra headers that this service might want to set in the HTTP
* response object.
*
* @see org.vfny.geoserver.Response#getResponseHeaders()
*/
public HashMap getResponseHeaders() {
return new HashMap();
}
/**
* Writes the feature information to the client in text/plain format.
*
* @param out
* The output stream to write to.
*
* @throws org.vfny.geoserver.ServiceException
* DOCUMENT ME!
* @throws java.io.IOException
* DOCUMENT ME!
*/
public void writeTo(OutputStream out)
throws ServiceException, java.io.IOException {
Charset charSet = getRequest().getWMS().getCharSet();
OutputStreamWriter osw = new OutputStreamWriter(out, charSet);
// getRequest().getGeoServer().getCharSet());
PrintWriter writer = new PrintWriter(osw);
// DJB: this is to limit the number of features read - as per the spec
// 7.3.3.7 FEATURE_COUNT
int featuresPrinted = 0; // how many features we've actually printed
// so far!
int maxfeatures = getRequest().getFeatureCount(); // will default to 1
// if not specified
// in the request
FeatureIterator<SimpleFeature> reader = null;
try {
final int size = results.size();
FeatureCollection<SimpleFeatureType, SimpleFeature> fr;
SimpleFeature f;
SimpleFeatureType schema;
List<AttributeDescriptor> types;
for (int i = 0; i < size; i++) // for each layer queried
{
fr = (FeatureCollection<SimpleFeatureType, SimpleFeature>) results.get(i);
reader = fr.features();
if (reader.hasNext() && (featuresPrinted < maxfeatures)) // if this layer has a hit and we're going to print it
{
writer.println("Results for FeatureType '" + fr.getSchema().getTypeName()
+ "':");
}
while (reader.hasNext()) {
f = reader.next();
schema = f.getFeatureType();
types = schema.getAttributeDescriptors();
if (featuresPrinted < maxfeatures) {
writer.println("--------------------------------------------");
for(AttributeDescriptor descriptor : types) {
final Name name = descriptor.getName();
if (Geometry.class.isAssignableFrom(descriptor.getType().getBinding())) {
// writer.println(types[j].getName() + " =
// [GEOMETRY]");
// DJB: changed this to print out WKT - its very
// nice for users
// Geometry g = (Geometry)
// f.getAttribute(types[j].getName());
// writer.println(types[j].getName() + " =
// [GEOMETRY] = "+g.toText() );
// DJB: decided that all the geometry info was
// too much - they should use GML version if
// they want those details
Geometry g = (Geometry) f.getAttribute(name);
writer.println(name + " = [GEOMETRY ("
+ g.getGeometryType() + ") with " + g.getNumPoints()
+ " points]");
} else {
writer.println(name + " = "
+ f.getAttribute(name));
}
}
writer.println("--------------------------------------------");
featuresPrinted++;
}
}
}
} catch (Exception ife) {
LOGGER.log(Level.WARNING, "Error generating getFeaturInfo, HTML format", ife);
writer.println("Unable to generate information " + ife);
} finally {
if (reader != null) {
reader.close();
}
}
if (featuresPrinted == 0) {
writer.println("no features were found");
}
writer.flush();
}
public String getContentDisposition() {
// TODO Auto-generated method stub
return null;
}
}