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    
020    import java.io.InputStream;
021    import java.io.OutputStream;
022    
023    import javax.xml.stream.XMLStreamException;
024    import javax.xml.stream.XMLStreamReader;
025    import javax.xml.stream.XMLStreamWriter;
026    
027    import com.thoughtworks.xstream.XStream;
028    import com.thoughtworks.xstream.io.HierarchicalStreamReader;
029    import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
030    import com.thoughtworks.xstream.io.xml.QNameMap;
031    import com.thoughtworks.xstream.io.xml.StaxReader;
032    import com.thoughtworks.xstream.io.xml.StaxWriter;
033    
034    import org.apache.camel.Exchange;
035    import org.apache.camel.converter.jaxp.StaxConverter;
036    import org.apache.camel.spi.DataFormat;
037    
038    /**
039     * A <a href="http://activemq.apache.org/camel/data-format.html">data format</a>
040     * ({@link DataFormat}) using XStream to marshal to and from XML
041     *
042     * @version $Revision: 711862 $
043     */
044    public class XStreamDataFormat extends AbstractXStreamWrapper  {
045        
046        public XStreamDataFormat() {
047            super();
048        }
049    
050        public XStreamDataFormat(XStream xstream) {
051            super(xstream);
052        }
053    
054        /**
055         * A factory method which takes a collection of types to be annotated
056         */
057        public static XStreamDataFormat processAnnotations(Iterable<Class<?>> types) {
058            XStreamDataFormat answer = new XStreamDataFormat();
059            XStream xstream = answer.getXStream();
060            for (Class<?> type : types) {
061                xstream.processAnnotations(type);
062            }
063            return answer;
064        }
065    
066        /**
067         * A factory method which takes a number of types to be annotated
068         */
069        public static XStreamDataFormat processAnnotations(Class<?>... types) {
070            XStreamDataFormat answer = new XStreamDataFormat();
071            XStream xstream = answer.getXStream();
072            for (Class<?> type : types) {
073                xstream.processAnnotations(type);
074            }
075            return answer;
076        }    
077    
078        protected HierarchicalStreamWriter createHierarchicalStreamWriter(Exchange exchange, Object body, OutputStream stream) throws XMLStreamException {
079            XMLStreamWriter xmlWriter = getStaxConverter().createXMLStreamWriter(stream);
080            return new StaxWriter(new QNameMap(), xmlWriter);
081        }
082    
083        protected HierarchicalStreamReader createHierarchicalStreamReader(Exchange exchange, InputStream stream) throws XMLStreamException {
084            XMLStreamReader xmlReader = getStaxConverter().createXMLStreamReader(stream);
085            return new StaxReader(new QNameMap(), xmlReader);
086        }
087    }