[Geotools-gt2-users] Problem with GML3 encoding

[Oliver P. <oli...@go...>]

Hi,

i twiddled a little with the examples from the Geotools homepage to encode a feature collection to GML. Using the example code for GML2 encoding worked fine, using GML3 does not work for me, there is neither output from the GML3 encoder nor any hint whats wrong. The source code is at the end of the mail. It would be nice, if someone could take a look on the code and give me a hint, why the encoding to GML3 does not work.

Thanks in advance,
Oliver


import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;

import org.geotools.geometry.jts.WKTReader2;
import org.geotools.data.simple.SimpleFeatureCollection;
import org.geotools.data.DataUtilities;
import org.geotools.feature.FeatureCollections;
import org.geotools.feature.SchemaException;
import org.geotools.GML;
import org.geotools.GML.Version;
import org.geotools.feature.simple.SimpleFeatureBuilder;
import org.opengis.feature.simple.SimpleFeatureType;

import com.vividsolutions.jts.io.ParseException;

public class GMLExample {
	public static void main(String [] args) {
		encodeGML2();
		encodeGML3();
	}
	
	public static void encodeGML2() {
		try {
			File locationFile = new File("location.xsd");
			
			locationFile = locationFile.getCanonicalFile();
			locationFile.createNewFile();
			
			URL locationURL = locationFile.toURI().toURL();
			URL baseURL = locationFile.getParentFile().toURI().toURL();
			
			FileOutputStream xsd = null;
			
			xsd = new FileOutputStream(locationFile);
			
			SimpleFeatureType TYPE = DataUtilities.createType("location", "geom:Point,name:String");
			
			GML encode = new GML(Version.GML2);
			encode.setBaseURL(baseURL);
			encode.setNamespace("location", locationURL.toExternalForm());
			encode.encode(xsd, TYPE);
			
			xsd.close();
			
			SimpleFeatureCollection collection = FeatureCollections.newCollection();
			WKTReader2 wkt = new WKTReader2();
			
			collection.add(SimpleFeatureBuilder.build(TYPE, new Object[] { wkt.read("POINT (1 2)"),"name1" }, null));
			collection.add(SimpleFeatureBuilder.build(TYPE, new Object[] { wkt.read("POINT (4 4)"),"name2" }, null));
			
			ByteArrayOutputStream xml = new ByteArrayOutputStream();

			GML encode2 = new GML(Version.WFS1_0);
			encode2.setBaseURL(baseURL);
			encode2.setNamespace("location", "location.xsd");
			encode2.encode(xml, collection);
			
			xml.close();
			
			System.out.println("GML2");
			System.out.println(xml.toString());
		} catch (IOException ioe) {
			// TODO Auto-generated catch block
			ioe.printStackTrace();
		} catch (SchemaException se) {
			// TODO Auto-generated catch block
			se.printStackTrace();
		} catch (ParseException pe) {
			// TODO Auto-generated catch block
			pe.printStackTrace();
		}
	}
	
	public static void encodeGML3() {
		try {
			File locationFile = new File("location.xsd");
		
			locationFile = locationFile.getCanonicalFile();
			locationFile.createNewFile();
			
			URL locationURL = locationFile.toURI().toURL();
			URL baseURL = locationFile.getParentFile().toURI().toURL();
			
			FileOutputStream xsd = null;
			
			xsd = new FileOutputStream(locationFile);
			
			SimpleFeatureType TYPE = null;
			
			TYPE = DataUtilities.createType("location", "geom:Point,name:String");
			
			GML encode = new GML(Version.GML3);
			encode.setBaseURL(baseURL);
			encode.setNamespace("location", locationURL.toExternalForm());
			encode.encode(xsd, TYPE);
			
			xsd.close();
			
			SimpleFeatureCollection collection = FeatureCollections.newCollection();
			WKTReader2 wkt = new WKTReader2();
			
			collection.add(SimpleFeatureBuilder.build(TYPE, new Object[] { wkt.read("POINT (1 2)"),"name1" }, null));
			collection.add(SimpleFeatureBuilder.build(TYPE, new Object[] { wkt.read("POINT (4 4)"),"name2" }, null));
			
			ByteArrayOutputStream xml = new ByteArrayOutputStream();

			GML encode2 = new GML(Version.GML3);
			encode2.setBaseURL(baseURL);
			encode2.setNamespace("location", "location.xsd");
			encode2.encode(xml, collection);
			
			xml.close();
			System.out.println("GML3");
			System.out.println(xml.toString());
		} catch (IOException ioe) {
			// TODO Auto-generated catch block
			ioe.printStackTrace();
		} catch (ParseException pe) {
			// TODO Auto-generated catch block
			pe.printStackTrace();
		} catch (SchemaException se) {
			// TODO Auto-generated catch block
			se.printStackTrace();
		}
	}
}