001    /** 
002     * 
003     * Copyright 2004 Protique Ltd
004     * 
005     * Licensed under the Apache License, Version 2.0 (the "License"); 
006     * you may not use this file except in compliance with the License. 
007     * 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     **/
018    package org.codehaus.activesoap.handler.xstream;
019    
020    import org.codehaus.activesoap.MessageExchange;
021    
022    import javax.xml.stream.XMLStreamWriter;
023    import java.lang.reflect.Method;
024    
025    /**
026     * @version $Revision: 1.3 $
027     */
028    public class XStreamInvokeMethodHandler extends XStreamHandler {
029        private Class serviceClass;
030        private Method method;
031    
032        public XStreamInvokeMethodHandler(Class serviceClass, Method method) {
033            this.serviceClass = serviceClass;
034            this.method = method;
035        }
036    
037        // Implementation methods
038        //-------------------------------------------------------------------------
039        protected void handleBody(MessageExchange exchange, Object body, XMLStreamWriter out) throws Exception {
040            Object instance = createService();
041            invokeService(body, exchange, out, instance);
042        }
043    
044        /**
045         * Invokes the service on the given serviceInstance
046         */
047        protected void invokeService(Object body, MessageExchange exchange, XMLStreamWriter out, Object serviceInstance) throws Exception {
048            Object answer = method.invoke(serviceInstance, new Object[]{body});
049            if (answer != null) {
050                xstream.marshal(answer, driver.createStaxWriter(out));
051            }
052        }
053    
054        /**
055         * Factory method to create a new instance temporary instance of the service
056         *
057         * @return
058         */
059        protected Object createService() throws Exception {
060            return serviceClass.newInstance();
061        }
062    }