/**
* 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.camel.dataformat.xstream;
import java.io.InputStream;
import java.io.OutputStream;
import javax.xml.stream.XMLStreamException;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
import org.apache.camel.Exchange;
import org.apache.camel.converter.jaxp.StaxConverter;
import org.apache.camel.spi.DataFormat;
/**
* An abstract class which implement <a href="http://activemq.apache.org/camel/data-format.html">data format</a>
* ({@link DataFormat}) interface which leverage the XStream library for XML or JSON's marshaling and unmarshaling
*
* @version $Revision: 711862 $
*/
public abstract class AbstractXStreamWrapper implements DataFormat {
private XStream xstream;
private StaxConverter staxConverter;
public AbstractXStreamWrapper() {
}
public AbstractXStreamWrapper(XStream xstream) {
this.xstream = xstream;
}
public XStream getXStream() {
if (xstream == null) {
xstream = createXStream();
}
return xstream;
}
public void setXStream(XStream xstream) {
this.xstream = xstream;
}
protected XStream createXStream() {
return new XStream();
}
public StaxConverter getStaxConverter() {
if (staxConverter == null) {
staxConverter = new StaxConverter();
}
return staxConverter;
}
public void setStaxConverter(StaxConverter staxConverter) {
this.staxConverter = staxConverter;
}
public void marshal(Exchange exchange, Object body, OutputStream stream) throws Exception {
HierarchicalStreamWriter writer = createHierarchicalStreamWriter(exchange, body, stream);
try {
getXStream().marshal(body, writer);
} finally {
writer.close();
}
}
public Object unmarshal(Exchange exchange, InputStream stream) throws Exception {
HierarchicalStreamReader reader = createHierarchicalStreamReader(exchange, stream);
try {
return getXStream().unmarshal(reader);
} finally {
reader.close();
}
}
protected abstract HierarchicalStreamWriter createHierarchicalStreamWriter(Exchange exchange, Object body, OutputStream stream) throws XMLStreamException;
protected abstract HierarchicalStreamReader createHierarchicalStreamReader(Exchange exchange, InputStream stream) throws XMLStreamException;
}