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/*
* 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.jaxb.axiom;
import java.io.OutputStream;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.axiom.om.OMDataSource;
import org.apache.axiom.om.OMOutputFormat;
import org.apache.axiom.om.util.StAXUtils;
import org.apache.tuscany.sca.databinding.jaxb.JAXBContextHelper;
/**
*
* @version $Rev$ $Date$
*/
public class JAXBDataSource implements OMDataSource {
private JAXBContext context;
private Object element;
private Marshaller marshaller;
public JAXBDataSource(Object element, JAXBContext context) {
this.element = element;
this.context = context;
}
private Marshaller getMarshaller() throws JAXBException {
if (marshaller == null) {
// For thread safety, not sure we can cache the marshaller
marshaller = JAXBContextHelper.getMarshaller(context);
}
return marshaller;
}
private void releaseMarshaller(Marshaller marshaller) {
JAXBContextHelper.releaseJAXBMarshaller(context, marshaller);
}
public XMLStreamReader getReader() throws XMLStreamException {
// FIXME: [rfeng] This is a quick and dirty implementation
// We could use the fastinfoset to optimize the roundtrip
StringWriter writer = new StringWriter();
serialize(writer, new OMOutputFormat());
StringReader reader = new StringReader(writer.toString());
return StAXUtils.createXMLStreamReader(reader);
}
public void serialize(final XMLStreamWriter xmlWriter) throws XMLStreamException {
try {
// marshaller.setProperty(Marshaller.JAXB_ENCODING, format.getCharSetEncoding());
AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {
public Object run() throws Exception {
try {
Marshaller marshaller = getMarshaller();
marshaller.marshal(element, xmlWriter);
} finally {
releaseMarshaller(marshaller);
}
return null;
}
});
} catch (PrivilegedActionException e) {
throw new XMLStreamException(e.getException());
}
}
public void serialize(final OutputStream output, OMOutputFormat format) throws XMLStreamException {
try {
// marshaller.setProperty(Marshaller.JAXB_ENCODING, format.getCharSetEncoding());
AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {
public Object run() throws Exception {
try {
Marshaller marshaller = getMarshaller();
marshaller.marshal(element, output);
} finally {
releaseMarshaller(marshaller);
}
return null;
}
});
} catch (PrivilegedActionException e) {
throw new XMLStreamException(e.getException());
}
}
public void serialize(final Writer writer, OMOutputFormat format) throws XMLStreamException {
try {
AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {
public Object run() throws Exception {
try {
Marshaller marshaller = getMarshaller();
marshaller.marshal(element, writer);
} finally {
releaseMarshaller(marshaller);
}
return null;
}
});
} catch (PrivilegedActionException e) {
throw new XMLStreamException(e.getException());
}
}
public Object getObject() {
return element;
}
}
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