/*******************************************************************************
 * Copyright (c) 2005, 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * IBM Corporation - initial API and implementation
 * yyyymmdd bug      Email and other contact information
 * -------- -------- -----------------------------------------------------------
 * 20060427   126780 rsinha@ca.ibm.com - Rupam Kuehner
 *******************************************************************************/

package org.eclipse.jst.ws.internal.consumption.ui.wsrt;

import java.util.ArrayList;
import java.util.Hashtable;

import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.Platform;
import org.eclipse.wst.ws.internal.wsrt.WebServiceScenario;

public class WebServiceRuntimeExtensionRegistry2
{

  private static WebServiceRuntimeExtensionRegistry2 instance_;

  //webServiceImpls_: 
  //key: id attribute of extension to org.eclipse.jst.ws.consumption.ui.wsImpl
  //value: org.eclipse.jst.ws.internal.consumption.ui.wsrt.WebServiceImpl 
  Hashtable webServiceImpls_;

  //webServiceClientImpls_: 
  //key: id attribute of extension to org.eclipse.jst.ws.consumption.ui.wsClientImpl
  //value: org.eclipse.jst.ws.internal.consumption.ui.wsrt.WebServiceClientImpl  
  Hashtable webServiceClientImpls_;

  //runtimes_: 
  //key: id attribute of extension to org.eclipse.jst.ws.consumption.ui.runtimes
  //value: org.eclipse.jst.ws.internal.consumption.ui.wsrt.RuntimeDescriptor
  Hashtable runtimes_;
  
  //serviceRuntimes_: 
  //key: id attribute of extension to org.eclipse.jst.ws.consumption.ui.serviceRuntimes
  //value: org.eclipse.jst.ws.internal.consumption.ui.wsrt.ServiceRuntimeDescriptor
  Hashtable serviceRuntimes_;
  
  //clientRuntimes_: 
  //key: id attribute of extension to org.eclipse.jst.ws.consumption.ui.clientRuntimes
  //value: org.eclipse.jst.ws.internal.consumption.ui.wsrt.ClientRuntimeDescriptor  
  Hashtable clientRuntimes_;
  
  //webServiceTypesList_ contains a list of String values in this form: "scenario/webServiceImplId",
  //where sceanrio the String representation of one of 
  //org.eclipse.wst.ws.internal.wsrt.WebServiceScenario.BOTTOM_UP or 
  //org.eclipse.wst.ws.internal.wsrt.WebServiceScenario.TOP_DOWN
  //and webServiceImplId is the id attribute of an extension to org.eclipse.jst.ws.consumption.ui.wsImpl
  //This list is used to determine the items displayed in the WebServiceType combo-box of page 1 of the 
  //Web serivce wizard.
  ArrayList webServiceTypesList_;
  
  //TODO: Not used. Remove this and all references to it in this class.
  ArrayList webServiceClientTypesList_;  
  
  
  /**
   * Returns a singleton instance of this class.
   * 
   * @return A singleton WebServiceRuntimeExtensionRegistry2 object.
   */
  public static WebServiceRuntimeExtensionRegistry2 getInstance()
  {
    if (instance_ == null)
    {
      instance_ = new WebServiceRuntimeExtensionRegistry2();
      instance_.load();
    }
    return instance_;
  }

  private void load()
  {
    webServiceImpls_ = new Hashtable();
    webServiceClientImpls_ = new Hashtable();
    runtimes_ = new Hashtable();
    serviceRuntimes_ = new Hashtable();
    clientRuntimes_ = new Hashtable();
    webServiceTypesList_ = new ArrayList();
    webServiceClientTypesList_ = new ArrayList();
    
    
    IExtensionRegistry reg = Platform.getExtensionRegistry();
    
//  Load WebServiceImpls by reading all extensions to org.eclipse.jst.ws.consumption.ui.wsImpl
    IConfigurationElement[] wsImplExts = reg.getConfigurationElementsFor(
        "org.eclipse.jst.ws.consumption.ui", "wsImpl");
    
    for(int idx=0; idx<wsImplExts.length; idx++) 
    {
      IConfigurationElement elem = wsImplExts[idx];        
        if (elem.getName().equals("webServiceImpl"))
        {
          WebServiceImpl wsimpl = new WebServiceImpl(elem);          
          webServiceImpls_.put(elem.getAttribute("id"), wsimpl);
        }        
    }
    
    //Load WebServiceClientImpls by reading all extensions to org.eclipse.jst.ws.consumption.ui.wsClientImpl
    IConfigurationElement[] wsClientImplExts = reg.getConfigurationElementsFor(
        "org.eclipse.jst.ws.consumption.ui", "wsClientImpl");
    
    for(int idx=0; idx<wsClientImplExts.length; idx++) 
    {
      IConfigurationElement elem = wsClientImplExts[idx];

        if (elem.getName().equals("webServiceClientImpl"))
        {
          WebServiceClientImpl wsClientImpl = new WebServiceClientImpl(elem);
          webServiceClientImpls_.put(elem.getAttribute("id"), wsClientImpl);
        }        
    }
    
    //Load runtimes by reading all extensions to org.eclipse.jst.ws.consumption.ui.runtimes
    IConfigurationElement[] runtimeExts = reg.getConfigurationElementsFor(
        "org.eclipse.jst.ws.consumption.ui", "runtimes");
    
    for(int idx=0; idx<runtimeExts.length; idx++) 
    {
      IConfigurationElement elem = runtimeExts[idx];

        if (elem.getName().equals("runtime"))
        {
          RuntimeDescriptor rd = new RuntimeDescriptor(elem);
          runtimes_.put(elem.getAttribute("id"), rd);
        }        
    }
    
    //Load serviceRuntimes by reading all extensions to org.eclipse.jst.ws.consumption.ui.serviceRuntimes
    IConfigurationElement[] serviceRuntimeExts = reg.getConfigurationElementsFor(
        "org.eclipse.jst.ws.consumption.ui", "serviceRuntimes");
    
    for(int idx=0; idx<serviceRuntimeExts.length; idx++) 
    {
      IConfigurationElement elem = serviceRuntimeExts[idx];

        if (elem.getName().equals("serviceRuntime"))
        {
          ServiceRuntimeDescriptor rd = new ServiceRuntimeDescriptor(elem, webServiceImpls_, runtimes_);
          serviceRuntimes_.put(elem.getAttribute("id"), rd);          
          updateWebServiceTypeList(rd);
        }        
    }
    
    //Load clientRuntimes by reading all extensions to org.eclipse.jst.ws.consumption.ui.clientRuntimes
    IConfigurationElement[] clientRuntimeExts = reg.getConfigurationElementsFor(
        "org.eclipse.jst.ws.consumption.ui", "clientRuntimes");
    
    for(int idx=0; idx<clientRuntimeExts.length; idx++) 
    {
      IConfigurationElement elem = clientRuntimeExts[idx];

      if (elem.getName().equals("clientRuntime"))
      {
        ClientRuntimeDescriptor rd = new ClientRuntimeDescriptor(elem, webServiceClientImpls_, runtimes_);
        clientRuntimes_.put(elem.getAttribute("id"), rd);
        updateWebServiceClientTypeList(rd);
          
      }        
    }
  }  
    
  /**
   * Updates the list of Web service types with the provided service runtime's contribution of
   * scenario/webServiceImpl combination.
   * @param descriptor
   */
  private void updateWebServiceTypeList(ServiceRuntimeDescriptor descriptor)
  {
    String serviceImplId = descriptor.getServiceImplementationType().getId();
    boolean bottomUp = descriptor.getBottomUp();
    boolean topDown = descriptor.getTopDown();
    if (bottomUp)
    {
      StringBuffer entrybuff = new StringBuffer();
      entrybuff.append(String.valueOf(WebServiceScenario.BOTTOMUP));
      entrybuff.append("/");
      entrybuff.append(serviceImplId);
      String entry = entrybuff.toString();
      if (!webServiceTypesList_.contains(entry))
      {
        webServiceTypesList_.add(entry);
      }      
    }
    
    if (topDown)
    {
      StringBuffer entrybuff = new StringBuffer();
      entrybuff.append(String.valueOf(WebServiceScenario.TOPDOWN));
      entrybuff.append("/");
      entrybuff.append(serviceImplId);
      String entry = entrybuff.toString();
      if (!webServiceTypesList_.contains(entry))
      {
        webServiceTypesList_.add(entry);
      }      
    }
  }
  
  private void updateWebServiceClientTypeList(ClientRuntimeDescriptor descriptor)
  {
    String clientImplId = descriptor.getClientImplementationType().getId();
    StringBuffer entrybuff = new StringBuffer();
    entrybuff.append(String.valueOf(WebServiceScenario.CLIENT));
    entrybuff.append("/");
    entrybuff.append(clientImplId);
    String entry = entrybuff.toString();
    if (!webServiceClientTypesList_.contains(entry))
    {
      webServiceClientTypesList_.add(entry);
    }    
  }
  
}