/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* 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.geotools.gml2;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import javax.xml.namespace.QName;
import org.eclipse.xsd.XSDElementDeclaration;
import org.eclipse.xsd.XSDParticle;
import org.eclipse.xsd.XSDTypeDefinition;
import org.geotools.feature.FeatureCollection;
import org.geotools.xml.ComplexBinding;
import org.geotools.xml.PropertyExtractor;
import org.geotools.xml.SchemaIndex;
import org.geotools.xml.Schemas;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
/**
* Special property extractor for extracting attributes from features.
*
* @author Justin Deoliveira, The Open Planning Project
* @deprecated This interface is replaced with {@link ComplexBinding#getProperties(Object, XSDElementDeclaration)}
*
*
*
* @source $URL$
*/
public class FeaturePropertyExtractor implements PropertyExtractor {
SchemaIndex schemaIndex;
public FeaturePropertyExtractor(SchemaIndex schemaIndex) {
this.schemaIndex = schemaIndex;
}
public boolean canHandle(Object object) {
return object instanceof SimpleFeature && !(object instanceof FeatureCollection);
}
public List properties(Object object, XSDElementDeclaration element) {
SimpleFeature feature = (SimpleFeature) object;
//check if this was a resolved feature, if so dont return anything
// TODO: this is just a hack for our lame xlink implementation
if (feature.getUserData().get("xlink:id") != null) {
return Collections.EMPTY_LIST;
}
SimpleFeatureType featureType = feature.getFeatureType();
String namespace = featureType.getName().getNamespaceURI();
if (namespace == null) {
namespace = element.getTargetNamespace();
}
String typeName = featureType.getTypeName();
//find the type in the schema
XSDTypeDefinition type = schemaIndex.getTypeDefinition(new QName(namespace, typeName));
if (type == null) {
//type not found, do a check for an element, and use its type
XSDElementDeclaration e = schemaIndex.getElementDeclaration(new QName(namespace,
typeName));
if (e != null) {
type = e.getTypeDefinition();
}
}
if (type == null) {
String msg = "Could not find element declaration: (" + namespace + ", " + typeName
+ " )";
throw new RuntimeException(msg);
}
List particles = Schemas.getChildElementParticles(type, true);
List properties = new ArrayList();
for (Iterator p = particles.iterator(); p.hasNext();) {
XSDParticle particle = (XSDParticle) p.next();
XSDElementDeclaration attribute = (XSDElementDeclaration) particle.getContent();
if (attribute.isElementDeclarationReference()) {
attribute = attribute.getResolvedElementDeclaration();
}
//ignore gml attributes
if (GML.NAMESPACE.equals(attribute.getTargetNamespace())) {
continue;
}
//make sure the feature type has an element
if (featureType.getDescriptor(attribute.getName()) == null) {
continue;
}
//get the value
Object attributeValue = feature.getAttribute(attribute.getName());
properties.add(new Object[] { particle, attributeValue });
}
return properties;
}
}