/*******************************************************************************
 * Copyright (c) 2006, 2007 g-Eclipse Consortium 
 * 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 
 * 
 * Initial development of the original code was made for the g-Eclipse project 
 * funded by European Union project number: FP6-IST-034327 
 * http://www.geclipse.eu/
 *  
 * Contributors:
 *     RUR (http://acet.rdg.ac.uk/)
 *     - Ashish Thandavan - initial API and implementation
 ******************************************************************************/
package eu.geclipse.workflow.ui.part;

import java.util.Iterator;
import java.util.List;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.core.commands.IHandlerListener;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gef.EditPart;
import org.eclipse.gmf.runtime.diagram.ui.editpolicies.CanonicalEditPolicy;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.PlatformUI;

/**
 * @generated
 */
public class WorkflowDiagramUpdateCommand implements IHandler {

  /**
   * @generated
   */
  public void addHandlerListener( IHandlerListener handlerListener ) {
  }

  /**
   * @generated
   */
  public void dispose() {
  }

  /**
   * @generated
   */
  public Object execute( ExecutionEvent event ) throws ExecutionException {
    ISelection selection = PlatformUI.getWorkbench()
      .getActiveWorkbenchWindow()
      .getSelectionService()
      .getSelection();
    if( selection instanceof IStructuredSelection ) {
      IStructuredSelection structuredSelection = ( IStructuredSelection )selection;
      if( structuredSelection.size() != 1 ) {
        return null;
      }
      if( structuredSelection.getFirstElement() instanceof EditPart
          && ( ( EditPart )structuredSelection.getFirstElement() ).getModel() instanceof View )
      {
        EObject modelElement = ( ( View )( ( EditPart )structuredSelection.getFirstElement() ).getModel() ).getElement();
        List editPolicies = CanonicalEditPolicy.getRegisteredEditPolicies( modelElement );
        for( Iterator it = editPolicies.iterator(); it.hasNext(); ) {
          CanonicalEditPolicy nextEditPolicy = ( CanonicalEditPolicy )it.next();
          nextEditPolicy.refresh();
        }
      }
    }
    return null;
  }

  /**
   * @generated
   */
  public boolean isEnabled() {
    return true;
  }

  /**
   * @generated
   */
  public boolean isHandled() {
    return true;
  }

  /**
   * @generated
   */
  public void removeHandlerListener( IHandlerListener handlerListener ) {
  }
}