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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.ext;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.bind.JAXBException;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.axiom.om.OMDataSourceExt;
import org.apache.axiom.om.OMException;
import org.apache.axiom.om.OMOutputFormat;
import org.apache.axiom.om.ds.OMDataSourceExtBase;
import org.apache.axiom.om.impl.MTOMXMLStreamWriter;
import org.apache.axiom.om.util.StAXUtils;
/**
* OMDataSource backed by a jaxb object
*/
public class JAXBDataSourceExt extends OMDataSourceExtBase {
private static final Logger log = Logger.getLogger(JAXBDataSourceExt.class.getName());
private Object jaxb;
private JAXBDSContext context;
public JAXBDataSourceExt(Object jaxb, JAXBDSContext context) {
super();
this.jaxb = jaxb;
this.context = context;
}
public void close() {
}
public OMDataSourceExt copy() {
return new JAXBDataSourceExt(jaxb, context);
}
public Object getObject() {
return jaxb;
}
public JAXBDSContext getContext() {
return context;
}
public XMLStreamReader getReader() throws XMLStreamException {
try {
String encoding = "utf-8";
InputStream is = new ByteArrayInputStream(getXMLBytes(encoding));
return StAXUtils.createXMLStreamReader(is, encoding);
} catch (UnsupportedEncodingException e) {
throw new XMLStreamException(e);
}
}
public void serialize(OutputStream output, OMOutputFormat format) throws XMLStreamException {
MTOMXMLStreamWriter writer = new MTOMXMLStreamWriter(output, format);
serialize(writer);
writer.flush();
try {
writer.close();
} catch (XMLStreamException e) {
// An exception can occur if nothing is written to the
// writer. This is possible if the underlying data source
// writers to the output stream directly.
if (log.isLoggable(Level.FINER)) {
log.finer("Catching and swallowing exception " + e);
}
}
}
public void serialize(Writer writerTarget, OMOutputFormat format) throws XMLStreamException {
MTOMXMLStreamWriter writer = new MTOMXMLStreamWriter(StAXUtils.createXMLStreamWriter(writerTarget));
writer.setOutputFormat(format);
serialize(writer);
writer.flush();
writer.close();
}
public void serialize(XMLStreamWriter xmlWriter) throws XMLStreamException {
try {
context.marshal(jaxb, xmlWriter);
} catch (JAXBException je) {
throw new XMLStreamException(je);
}
}
public byte[] getXMLBytes(String encoding) throws UnsupportedEncodingException {
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
// Exposes getOutputStream, which allows faster writes.
XMLStreamWriterWithOS writer = new XMLStreamWriterWithOS(baos, encoding);
// Write the business object to the writer
serialize(writer);
// Flush the writer
writer.flush();
writer.close();
return baos.toByteArray();
} catch (XMLStreamException e) {
throw new OMException(e);
}
}
public boolean isDestructiveRead() {
return false;
}
public boolean isDestructiveWrite() {
return false;
}
}
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