plugins/org.eclipse.emf.cdo.dawn.examples.acore.diagram/src/org/eclipse/emf/cdo/dawn/examples/acore/diagram/edit/helpers/AcoreBaseEditHelper.java

/*
 * Copyright (c) 2010, 2012, 2015 Eike Stepper (Berlin, Germany) 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:
 *     Martin Fluegge - initial API and implementation
 *
 */
package org.eclipse.emf.cdo.dawn.examples.acore.diagram.edit.helpers;

import org.eclipse.gmf.runtime.common.core.command.CompositeCommand;
import org.eclipse.gmf.runtime.common.core.command.ICommand;
import org.eclipse.gmf.runtime.emf.type.core.ElementTypeRegistry;
import org.eclipse.gmf.runtime.emf.type.core.IElementType;
import org.eclipse.gmf.runtime.emf.type.core.edithelper.AbstractEditHelper;
import org.eclipse.gmf.runtime.emf.type.core.edithelper.IEditHelperAdvice;
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateElementRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateRelationshipRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyElementRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyReferenceRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.IEditCommandRequest;

/**
 * @generated
 */
public class AcoreBaseEditHelper extends AbstractEditHelper
{

  /**
   * @generated
   */
  public static final String EDIT_POLICY_COMMAND = "edit policy command"; //$NON-NLS-1$

  /**
   * @generated
   */
  public static final String CONTEXT_ELEMENT_TYPE = "context element type"; //$NON-NLS-1$

  /**
   * @generated
   */
  @Override
  protected IEditHelperAdvice[] getEditHelperAdvice(IEditCommandRequest req)
  {
    if (req.getParameter(CONTEXT_ELEMENT_TYPE) instanceof IElementType)
    {
      return ElementTypeRegistry.getInstance()
          .getEditHelperAdvice((IElementType)req.getParameter(CONTEXT_ELEMENT_TYPE));
    }
    return super.getEditHelperAdvice(req);
  }

  /**
   * @generated
   */
  @Override
  protected ICommand getInsteadCommand(IEditCommandRequest req)
  {
    ICommand epCommand = (ICommand)req.getParameter(EDIT_POLICY_COMMAND);
    req.setParameter(EDIT_POLICY_COMMAND, null);
    ICommand ehCommand = super.getInsteadCommand(req);
    if (epCommand == null)
    {
      return ehCommand;
    }
    if (ehCommand == null)
    {
      return epCommand;
    }
    CompositeCommand command = new CompositeCommand(null);
    command.add(epCommand);
    command.add(ehCommand);
    return command;
  }

  /**
   * @generated
   */
  @Override
  protected ICommand getCreateCommand(CreateElementRequest req)
  {
    return null;
  }

  /**
   * @generated
   */
  @Override
  protected ICommand getCreateRelationshipCommand(CreateRelationshipRequest req)
  {
    return null;
  }

  /**
   * @generated
   */
  @Override
  protected ICommand getDestroyElementCommand(DestroyElementRequest req)
  {
    return null;
  }

  /**
   * @generated
   */
  @Override
  protected ICommand getDestroyReferenceCommand(DestroyReferenceRequest req)
  {
    return null;
  }
}