/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.databinding.saxon;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import net.sf.saxon.om.NodeInfo;
import org.apache.tuscany.sca.databinding.PullTransformer;
import org.apache.tuscany.sca.databinding.TransformationContext;
import org.apache.tuscany.sca.databinding.impl.BaseTransformer;
import org.apache.tuscany.sca.interfacedef.DataType;
import org.apache.tuscany.sca.interfacedef.util.XMLType;
import org.apache.tuscany.sdo.helper.TypeHelperImpl;
import org.apache.tuscany.sdo.impl.FactoryBase;
import org.w3c.dom.Document;
import commonj.sdo.DataObject;
import commonj.sdo.Type;
import commonj.sdo.helper.XMLHelper;
import commonj.sdo.impl.HelperProvider;
/**
* Transforms NodeInfo objects to SDO DataObject-s
* @version $Rev: 566518 $ $Date: 2007-08-16 08:21:34 +0100 (Thu, 16 Aug 2007) $
* Before constructing the data object, resulting XML is populated
* with correct namespaces (which are taken from the logical target data type)
* These namespaces are crucial for constructing the right instance of
* the DataObject (i.e. if there is a SDO factory, an instance from this factory will
* be used, not the generic any data object)
*/
public class NodeInfo2DataObjectTransformer extends
BaseTransformer<NodeInfo, DataObject> implements
PullTransformer<NodeInfo, DataObject> {
private NodeInfo2NodeTransformer nodeInfo2NodeTransformer;
public NodeInfo2DataObjectTransformer(NodeInfo2NodeTransformer nodeInfo2NodeTransformer) {
this.nodeInfo2NodeTransformer = nodeInfo2NodeTransformer;
}
@Override
protected Class getSourceType() {
return NodeInfo.class;
}
@Override
protected Class getTargetType() {
return DataObject.class;
}
@Override
public int getWeight() {
return 10 + nodeInfo2NodeTransformer.getWeight();
}
public DataObject transform(NodeInfo source, TransformationContext context) {
Document doc = (Document)nodeInfo2NodeTransformer.transform(source, context);
Document cloneDoc = cloneDocumentWithRightNamespaces(doc, context);
return produceResult(cloneDoc);
}
private Document cloneDocumentWithRightNamespaces(Document doc, TransformationContext context) {
DataType targetDataType = context.getTargetDataType();
String namespace = null;
Object logical = targetDataType.getLogical();
if(logical instanceof XMLType) {
namespace = ((XMLType)logical).getTypeName().getNamespaceURI();
} else {
Type type = HelperProvider.INSTANCE.typeHelper().getType(targetDataType.getClass());
if(type == null) {
return doc;
}
namespace = type.getURI();
}
if(namespace == null) {
return doc;
}
FactoryBase factory = (FactoryBase)((TypeHelperImpl)HelperProvider.INSTANCE.typeHelper()).getExtendedMetaData().getPackage(namespace);
if(factory == null) {
return doc;
}
String prefix = factory.getNsPrefix();
Document cloneDoc = (Document)doc.cloneNode(false);
SaxonDataBindingHelper.setNamespacesAndPrefixesReq(doc, cloneDoc, cloneDoc, namespace, prefix);
return cloneDoc;
}
private DataObject produceResult(Document doc) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
StreamResult streamResult = new StreamResult(baos);
try {
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.transform(new DOMSource(doc), streamResult);
} catch (TransformerConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TransformerFactoryConfigurationError e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TransformerException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
baos.flush();
baos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
DataObject resultingObject = XMLHelper.INSTANCE.load(new String(baos.toByteArray())).getRootObject();
return resultingObject;
}
}