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;
019    
020    import org.codehaus.activesoap.Handler;
021    import org.codehaus.activesoap.MessageExchange;
022    
023    import javax.xml.stream.XMLStreamReader;
024    import javax.xml.stream.XMLStreamWriter;
025    
026    /**
027     * Echos the block of XML straight to the output such as for pass-through handlers
028     * or forwarding services and routers.
029     *
030     * @version $Revision: 1.7 $
031     */
032    public class EchoHandler implements Handler {
033    
034        private static EchoHandler instance = new EchoHandler();
035    
036        public static EchoHandler getInstance() {
037            return instance;
038        }
039    
040        public void invoke(MessageExchange exchange) throws Exception {
041            XMLStreamReader in = exchange.getIn();
042            XMLStreamWriter out = exchange.getOut();
043            exchange.copy(exchange.getIn(), exchange.getOut());
044        }
045    }