/*
    * 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;
   }
   
   
 }