/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2001-2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Axis" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package org.apache.axis.providers.java;

import org.apache.axis.AxisFault;
import org.apache.axis.MessageContext;
import org.apache.axis.description.OperationDesc;
import org.apache.axis.i18n.Messages;
import org.apache.axis.message.SOAPBodyElementAxisImpl;
import org.apache.axis.message.SOAPEnvelopeAxisImpl;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

import java.lang.reflect.Method;
import java.util.Vector;

/**
 * Deal with message-style Java services.  For now, these are services
 * with exactly ONE OperationDesc, pointing to a method which looks like
 * one of the following:
 * <p/>
 * public Element [] method(Vector v);
 * (NOTE : This is silly, we should change it to either be Vector/Vector
 * or Element[]/Element[])
 * <p/>
 * public Document method(Document doc);
 * <p/>
 * public void method(MessageContext mc);
 *
 * @author Doug Davis (dug@us.ibm.com)
 * @author Glen Daniels (gdaniels@apache.org)
 */
public class MsgProvider extends JavaProvider
{
   /**
    * Process the message.  Figure out the method "style" (one of the three
    * allowed signatures, which has already been determined and cached in
    * the OperationDesc) and do the actual invocation.  Note that we don't
    * catch exceptions here, preferring to bubble them right up through to
    * someone who'll catch it above us.
    *
    * @param msgContext the active MessageContext
    * @param reqEnv     the request SOAPEnvelope
    * @param resEnv     the response SOAPEnvelope (we should fill this in)
    * @param obj        the service target object
    * @throws Exception
    */
   public void processMessage(MessageContext msgContext,
                              SOAPEnvelopeAxisImpl reqEnv,
                              SOAPEnvelopeAxisImpl resEnv,
                              Object obj)
           throws Exception
   {
      OperationDesc operation = msgContext.getOperation();
      if (operation == null)
      {
         throw new AxisFault(Messages.getMessage("noOperationForQName",
                 reqEnv.getFirstBody().
                 getQName().toString()));
      }

      Method method = operation.getMethod();

      int methodType = operation.getMessageOperationStyle();

      if (methodType != OperationDesc.MSG_METHOD_SOAPENVELOPE)
      {
         // dig out just the body, and pass it on
         Vector bodies = reqEnv.getBodyElements();
         Object argObjects[] = new Object[1];

         switch (methodType)
         {
            // SOAPBodyElement [] / SOAPBodyElement []
            case OperationDesc.MSG_METHOD_BODYARRAY:
               SOAPBodyElementAxisImpl[] bodyElements =
                       new SOAPBodyElementAxisImpl[bodies.size()];
               bodies.toArray(bodyElements);
               argObjects[0] = bodyElements;
               SOAPBodyElementAxisImpl[] bodyResult =
                       (SOAPBodyElementAxisImpl[])method.invoke(obj, argObjects);
               if (bodyResult != null)
               {
                  for (int i = 0; i < bodyResult.length; i++)
                  {
                     SOAPBodyElementAxisImpl bodyElement = bodyResult[i];
                     resEnv.addBodyElement(bodyElement);
                  }
               }
               return;

               // Element [] / Element []
            case OperationDesc.MSG_METHOD_ELEMENTARRAY:
               Element[] elements = new Element[bodies.size()];
               for (int i = 0; i < elements.length; i++)
               {
                  SOAPBodyElementAxisImpl body = (SOAPBodyElementAxisImpl)bodies.get(i);
                  elements[i] = body.getAsDOM();
               }
               argObjects[0] = elements;
               Element[] elemResult =
                       (Element[])method.invoke(obj, argObjects);
               if (elemResult != null)
               {
                  for (int i = 0; i < elemResult.length; i++)
                  {
                     if (elemResult[i] != null)
                        resEnv.addBodyElement(new SOAPBodyElementAxisImpl(elemResult[i]));
                  }
               }
               return;

               // Element [] / Element []
            case OperationDesc.MSG_METHOD_DOCUMENT:
               Document doc = ((SOAPBodyElementAxisImpl)bodies.get(0)).getAsDocument();
               argObjects[0] = doc;
               Document resultDoc =
                       (Document)method.invoke(obj, argObjects);
               if (resultDoc != null)
               {
                  resEnv.addBodyElement(new SOAPBodyElementAxisImpl(resultDoc.getDocumentElement()));
               }
               return;
         }
      }
      else
      {
         Object argObjects[] = new Object[2];

         // SOAPEnvelope / SOAPEnvelope
         argObjects[0] = reqEnv;
         argObjects[1] = resEnv;
         method.invoke(obj, argObjects);
         return;
      }

      // SHOULD NEVER GET HERE...
      throw new AxisFault(Messages.getMessage("badMsgMethodStyle"));
   }
}

;
