/*

  * Copyright 2001-2004 The Apache Software Foundation.

  * 

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  * 

  *      http://www.apache.org/licenses/LICENSE-2.0

  * 

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.apache.ws.scout.transport;

 import java.lang.reflect.Method;

 import java.net.URI;

 import javax.xml.parsers.DocumentBuilder;

 import javax.xml.parsers.DocumentBuilderFactory;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 import org.apache.ws.scout.util.XMLUtils;

 import org.w3c.dom.Document;

 import org.w3c.dom.Element;

 import org.w3c.dom.Node;

 /**

  * Local Message transport class.

  * 

  * <p>This transport calls jUDDI directly.</p>

  * 

  * @author Kurt Stam (kurt.stam@redhat.com)

  */

 public class LocalTransport implements Transport

 {

   private static Log log = LogFactory.getLog(LocalTransport.class);

   private String nodeName;

   private String managerName;

   public LocalTransport(){};

   public LocalTransport(String nodeName, String managerName) {

     super();

     this.nodeName = nodeName;

     this.managerName = managerName;

 }

 /** 

    * Sends an element and returns an element.

    */

   public Element send(Element request,URI endpointURI)

     throws TransportException

   {    

     Element response = null;

     if (log.isDebugEnabled()) {

             log.debug("\nRequest message:\n" + XMLUtils.convertNodeToXMLString(request));

             log.debug("Calling " + endpointURI + " locally");

     }

     try {

             String className = endpointURI.getPath();

             String methodName = endpointURI.getFragment();

             log.debug("Calling class=" + className);

             log.debug("Method=" + methodName);

             Class<?> c = Class.forName(className);

             Object requestHandler = c.newInstance();

             Node node = null;

             if (managerName!=null) {

                 Method method = c.getMethod(methodName, Element.class, String.class, String.class);

                 node = (Node) method.invoke(requestHandler, request, nodeName, managerName);

             } else {

                 Method method = c.getMethod(methodName, Element.class);

                 node = (Node) method.invoke(requestHandler, request);

             }

             if (node!=null && node.getFirstChild()!=null) {

                     response = (Element) node.getFirstChild();

             }

     } catch (Exception ex) {

       throw new TransportException(ex);

     }

     if (log.isDebugEnabled()) {

             log.debug("\nResponse message:\n" + XMLUtils.convertNodeToXMLString(response));

     }

     return response;

   }

   /**

    * Sends an XML, responds with an XML.

    */

   public String send(String request,URI endpointURI)

     throws TransportException

   {    

     String response = null;

     log.debug("\nRequest message:\n" + request);

     try {

             DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

         DocumentBuilder parser = factory.newDocumentBuilder();

         Document document = parser.parse(request);

         Element element = document.getDocumentElement();

         response= XMLUtils.convertNodeToXMLString(send(element, endpointURI));

     } catch (Exception ex) { 

             throw new TransportException(ex);

     }

     log.debug("\nResponse message:\n" + response);

     return response;

   }

 }