/*******************************************************************************
 * Copyright (c) 2001, 2004 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
 *******************************************************************************/
package org.eclipse.wst.wsdl.tests.util;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.Hashtable;
import java.util.Iterator;

import org.eclipse.core.runtime.IPluginDescriptor;
import org.eclipse.core.runtime.Platform;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
import org.eclipse.wst.wsdl.Definition;
import org.eclipse.wst.wsdl.WSDLPackage;
import org.eclipse.wst.wsdl.internal.util.WSDLResourceFactoryImpl;
import org.eclipse.wst.wsdl.util.WSDLResourceImpl;
import org.eclipse.xsd.XSDPackage;
import org.eclipse.xsd.util.XSDResourceFactoryImpl;

/**
 * @author Kihup Boo
 */
public final class DefinitionLoader
{
  {
    // This is needed because we don't have the following in the plugin.xml
    //
    //   <extension point = "org.eclipse.emf.extension_parser">
    //     <parser type="wsdl" class="com.ibm.etools.wsdl.util.WSDLResourceFactoryImpl"/>
    //   </extension>
    //
    Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().put("wsdl", new WSDLResourceFactoryImpl());
    WSDLPackage pkg = WSDLPackage.eINSTANCE;
  
    // We need this for XSD <import>.
    Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().put("xsd", new XSDResourceFactoryImpl());
    XSDPackage xsdpkg = XSDPackage.eINSTANCE;
  }
  
  /**
   * This class provides static methods only.
   */
  private DefinitionLoader()
  {
  }

  static public Definition load(String filename) throws IOException
  {
    return load(filename,false);
  }

  static public Definition load(String filename, boolean useExtensionFactories) throws IOException
  {
    URI uri;
    File file = new File(filename);
    if (file.isFile())
      uri = URI.createFileURI(file.getCanonicalFile().toString());
    else
    { // Assume that this is run as a JUnit Plug-in test.
      //uri = URI.createURI(filename);
      IPluginDescriptor pd = Platform.getPluginRegistry().getPluginDescriptor("org.eclipse.wst.wsdl.tests");
      URL url = pd.getInstallURL();
      url = new URL(url,filename);
      String s = Platform.resolve(url).getFile();
      uri = URI.createFileURI(s);
    }
  
    ResourceSet resourceSet = new ResourceSetImpl();
    resourceSet.getAdapterFactories().add(new WSDLModelLocatorAdapterFactory());
    resourceSet.getAdapterFactories().add(new XSDSchemaLocationResolverAdapterFactory());
    
    WSDLResourceImpl wsdlMainResource = (WSDLResourceImpl)resourceSet.createResource(URI.createURI("*.wsdl"));
    wsdlMainResource.setURI(uri);
    java.util.Map map = new Hashtable();
    map.put(WSDLResourceImpl.CONTINUE_ON_LOAD_ERROR,Boolean.valueOf(true));
    map.put(WSDLResourceImpl.USE_EXTENSION_FACTORIES,Boolean.valueOf(useExtensionFactories));
    wsdlMainResource.load(map);
  
    Definition definition = null;
    for (Iterator resources = resourceSet.getResources().iterator(); resources.hasNext(); )
    {
      Object resource = resources.next();
      if (resource instanceof WSDLResourceImpl)
      {
        WSDLResourceImpl wsdlResource = (WSDLResourceImpl)resource;
        definition = wsdlResource.getDefinition();
        return definition;
      }
    }
    
    return null;
  }

  static public void store(Definition definition, String filename) throws IOException
  {
    Resource resource = definition.eResource();
    resource.setURI(URI.createFileURI(filename));
    resource.save(null);
  }
}