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.spi.DataFormat;
035    
036    /**
037     * A <a href="http://camel.apache.org/data-format.html">data format</a>
038     * ({@link DataFormat}) using XStream to marshal to and from XML
039     *
040     * @version $Revision: 816070 $
041     */
042    public class XStreamDataFormat extends AbstractXStreamWrapper  {
043        
044        public XStreamDataFormat() {
045        }
046    
047        public XStreamDataFormat(XStream xstream) {
048            super(xstream);
049        }
050    
051        /**
052         * A factory method which takes a collection of types to be annotated
053         */
054        public static XStreamDataFormat processAnnotations(Iterable<Class<?>> types) {
055            XStreamDataFormat answer = new XStreamDataFormat();
056            XStream xstream = answer.getXStream();
057            for (Class<?> type : types) {
058                xstream.processAnnotations(type);
059            }
060            return answer;
061        }
062    
063        /**
064         * A factory method which takes a number of types to be annotated
065         */
066        public static XStreamDataFormat processAnnotations(Class<?>... types) {
067            XStreamDataFormat answer = new XStreamDataFormat();
068            XStream xstream = answer.getXStream();
069            for (Class<?> type : types) {
070                xstream.processAnnotations(type);
071            }
072            return answer;
073        }    
074    
075        protected HierarchicalStreamWriter createHierarchicalStreamWriter(Exchange exchange, Object body, OutputStream stream) throws XMLStreamException {
076            XMLStreamWriter xmlWriter = getStaxConverter().createXMLStreamWriter(stream);
077            return new StaxWriter(new QNameMap(), xmlWriter);
078        }
079    
080        protected HierarchicalStreamReader createHierarchicalStreamReader(Exchange exchange, InputStream stream) throws XMLStreamException {
081            XMLStreamReader xmlReader = getStaxConverter().createXMLStreamReader(stream);
082            return new StaxReader(new QNameMap(), xmlReader);
083        }
084    }