/* | |
* 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.axis2.datasource.jaxb; | |
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; | |
import org.apache.axis2.jaxws.message.util.XMLStreamWriterWithOS; | |
import org.apache.commons.logging.Log; | |
import org.apache.commons.logging.LogFactory; | |
import javax.xml.bind.JAXBException; | |
import javax.xml.stream.XMLStreamException; | |
import javax.xml.stream.XMLStreamReader; | |
import javax.xml.stream.XMLStreamWriter; | |
import java.io.ByteArrayInputStream; | |
import java.io.ByteArrayOutputStream; | |
import java.io.InputStream; | |
import java.io.OutputStream; | |
import java.io.UnsupportedEncodingException; | |
import java.io.Writer; | |
/** | |
* OMDataSource backed by a jaxb object | |
*/ | |
public class JAXBDataSource extends OMDataSourceExtBase { | |
private static final Log log = LogFactory.getLog(JAXBDataSource.class); | |
Object jaxb; | |
JAXBDSContext context; | |
public JAXBDataSource(Object jaxb, JAXBDSContext context) { | |
super(); | |
this.jaxb = jaxb; | |
this.context = context; | |
// Currently we cannot control how the unmarshaller will emit the prefix | |
// So if the value of the prefix is needed, full expansion is necessary. | |
setProperty(OMDataSourceExt.LOSSY_PREFIX, Boolean.TRUE); | |
} | |
public void close() { | |
} | |
public OMDataSourceExt copy() { | |
return new JAXBDataSource(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.isDebugEnabled()) { | |
log.debug("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) { | |
if (log.isDebugEnabled()) { | |
try { | |
log.debug("JAXBContext for marshal failure:" + | |
context.getJAXBContext(context.getClassLoader())); | |
} catch (Exception e) { | |
} | |
} | |
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; | |
} | |
} |