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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* Licensed 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.binding.celtix.handler.io;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.List;
import javax.xml.namespace.QName;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.ws.Holder;
import javax.xml.ws.WebServiceException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import commonj.sdo.DataObject;
import commonj.sdo.Property;
import commonj.sdo.helper.TypeHelper;
import commonj.sdo.helper.XSDHelper;
import org.apache.tuscany.databinding.sdo.SDOXMLHelper;
import org.apache.tuscany.sdo.helper.DataFactoryImpl;
import org.apache.tuscany.sdo.helper.XMLHelperImpl;
import org.apache.tuscany.sdo.helper.XSDHelperImpl;
import org.objectweb.celtix.bindings.DataWriter;
import org.objectweb.celtix.context.ObjectMessageContext;
public class NodeDataWriter implements DataWriter<Node> {
SCADataBindingCallback callback;
public NodeDataWriter(SCADataBindingCallback cb) {
callback = cb;
}
public void write(Object obj, Node output) {
write(obj, null, output);
}
public void write(Object obj, QName elName, Node output) {
byte bytes[] = SDOXMLHelper.toXMLBytes(
callback.getResourceClassLoader(),
callback.getTypeHelper(),
new Object[] {obj},
elName,
false);
ByteArrayInputStream bin = new ByteArrayInputStream(bytes);
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setNamespaceAware(true);
try {
SAXParser parser = factory.newSAXParser();
parser.parse(bin, new NodeContentHandler(output));
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new WebServiceException(e);
}
}
public void writeWrapper(ObjectMessageContext objCtx, boolean isOutbound, Node nd) {
QName wrapperName;
if (isOutbound) {
wrapperName = callback.getOperationInfo().getResponseWrapperQName();
} else {
wrapperName = callback.getOperationInfo().getRequestWrapperQName();
}
DataObject obj = toWrappedDataObject(callback.getTypeHelper(),
isOutbound ? objCtx.getReturn() : null,
objCtx.getMessageObjects(),
wrapperName);
try {
//REVISIT - this is SUCH a hack. SDO needs to be able to
//go directly to some formats other than streams. They are working
//on stax, but not there yet.
RawByteArrayOutputStream bout = new RawByteArrayOutputStream();
new XMLHelperImpl(callback.getTypeHelper()).save(obj,
wrapperName.getNamespaceURI(),
wrapperName.getLocalPart(),
bout);
ByteArrayInputStream bin = new ByteArrayInputStream(bout.getBytes(),
0,
bout.size());
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setNamespaceAware(true);
SAXParser parser = factory.newSAXParser();
parser.parse(bin, new NodeContentHandler(nd));
} catch (IOException e) {
throw new WebServiceException(e);
} catch (ParserConfigurationException e) {
throw new WebServiceException(e);
} catch (SAXException e) {
throw new WebServiceException(e);
}
}
public static DataObject toWrappedDataObject(TypeHelper typeHelper,
Object ret,
Object[] os,
QName typeQN) {
XSDHelper xsdHelper = new XSDHelperImpl(typeHelper);
Property property = xsdHelper.getGlobalProperty(typeQN.getNamespaceURI(),
typeQN.getLocalPart(), true);
DataObject dataObject = new DataFactoryImpl(typeHelper).create(property.getType());
List ips = dataObject.getInstanceProperties();
int offset = 0;
if (ret != null) {
dataObject.set(0, ret);
offset = 1;
}
for (int i = offset; i < ips.size(); i++) {
if (os[i - offset] instanceof Holder) {
Holder<?> holder = (Holder<?>)os[i - offset];
dataObject.set(i, holder.value);
} else {
dataObject.set(i, os[i - offset]);
}
}
return dataObject;
}
private class NodeContentHandler extends DefaultHandler {
Node current;
Document doc;
public NodeContentHandler(Node nd) {
doc = nd.getOwnerDocument();
if (doc == null && nd instanceof Document) {
doc = (Document)nd;
}
current = nd;
}
public void characters(char[] ch, int start, int length) {
current.appendChild(doc.createTextNode(new String(ch, start, length)));
}
public void startElement(String uri, String localName,
String qName, Attributes attributes) {
Element newEl = doc.createElementNS(uri, qName);
current.appendChild(newEl);
current = newEl;
for (int x = 0; x < attributes.getLength(); x++) {
newEl.setAttributeNS(attributes.getURI(x),
attributes.getQName(x),
attributes.getValue(x));
}
}
public void endElement(String uri, String localName, String qName) {
current = current.getParentNode();
}
}
}
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