001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.camel.dataformat.xstream;
018    
019    import java.io.InputStream;
020    import java.io.OutputStream;
021    
022    import javax.xml.stream.XMLStreamException;
023    import javax.xml.stream.XMLStreamReader;
024    import javax.xml.stream.XMLStreamWriter;
025    
026    import com.thoughtworks.xstream.XStream;
027    import com.thoughtworks.xstream.io.HierarchicalStreamReader;
028    import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
029    import com.thoughtworks.xstream.io.xml.QNameMap;
030    import com.thoughtworks.xstream.io.xml.StaxReader;
031    import com.thoughtworks.xstream.io.xml.StaxWriter;
032    
033    import org.apache.camel.Exchange;
034    import org.apache.camel.converter.jaxp.StaxConverter;
035    import org.apache.camel.spi.DataFormat;
036    
037    /**
038     * A <a href="http://camel.apache.org/data-format.html">data format</a>
039     * ({@link DataFormat}) using XStream to marshal to and from XML
040     *
041     * @version $Revision: 748596 $
042     */
043    public class XStreamDataFormat extends AbstractXStreamWrapper  {
044        
045        public XStreamDataFormat() {
046        }
047    
048        public XStreamDataFormat(XStream xstream) {
049            super(xstream);
050        }
051    
052        /**
053         * A factory method which takes a collection of types to be annotated
054         */
055        public static XStreamDataFormat processAnnotations(Iterable<Class<?>> types) {
056            XStreamDataFormat answer = new XStreamDataFormat();
057            XStream xstream = answer.getXStream();
058            for (Class<?> type : types) {
059                xstream.processAnnotations(type);
060            }
061            return answer;
062        }
063    
064        /**
065         * A factory method which takes a number of types to be annotated
066         */
067        public static XStreamDataFormat processAnnotations(Class<?>... types) {
068            XStreamDataFormat answer = new XStreamDataFormat();
069            XStream xstream = answer.getXStream();
070            for (Class<?> type : types) {
071                xstream.processAnnotations(type);
072            }
073            return answer;
074        }    
075    
076        protected HierarchicalStreamWriter createHierarchicalStreamWriter(Exchange exchange, Object body, OutputStream stream) throws XMLStreamException {
077            XMLStreamWriter xmlWriter = getStaxConverter().createXMLStreamWriter(stream);
078            return new StaxWriter(new QNameMap(), xmlWriter);
079        }
080    
081        protected HierarchicalStreamReader createHierarchicalStreamReader(Exchange exchange, InputStream stream) throws XMLStreamException {
082            XMLStreamReader xmlReader = getStaxConverter().createXMLStreamReader(stream);
083            return new StaxReader(new QNameMap(), xmlReader);
084        }
085    }