plugins/org.eclipse.graphiti.ui/src/org/eclipse/graphiti/ui/internal/command/CreateModelObjectCommand.java

/*******************************************************************************
 * <copyright>
 *
 * Copyright (c) 2005, 2012 SAP AG.
 * 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:
 *    SAP AG - initial API, implementation and documentation
 *    mwenz - Bug 340627 - Features should be able to indicate cancellation
 *    Philip Alldredge - Bug 418676 - Undo is not disabled when canUndo is false for Palette features
 *
 * </copyright>
 *
 *******************************************************************************/
package org.eclipse.graphiti.ui.internal.command;

import org.eclipse.graphiti.features.ICreateFeature;
import org.eclipse.graphiti.features.context.ICreateContext;
import org.eclipse.graphiti.internal.command.CommandExec;
import org.eclipse.graphiti.internal.command.GenericFeatureCommandWithContext;
import org.eclipse.graphiti.ui.platform.IConfigurationProvider;

/**
 * @noinstantiate This class is not intended to be instantiated by clients.
 * @noextend This class is not intended to be subclassed by clients.
 */
public class CreateModelObjectCommand extends GFCommand {

	public CreateModelObjectCommand(IConfigurationProvider configurationProvider, ICreateFeature feature,
			ICreateContext context) {
		super(configurationProvider);
		setFeature(feature);
		setContext(context);
	}

	@Override
	public boolean canExecute() {
		boolean ret = ((ICreateFeature) getFeature()).canCreate((ICreateContext) getContext());
		return ret;
	}

	@Override
	public void execute() {
		GenericFeatureCommandWithContext genericFeatureCommandWithContext = new GenericFeatureCommandWithContext(getFeature(), getContext());
		try {
			CommandExec.getSingleton().executeCommand(genericFeatureCommandWithContext, getTransactionalEditingDomain());
		} catch (Exception e) {
			// Wrap in runtime exception (handled outside)
			if (e instanceof RuntimeException) {
				throw (RuntimeException) e;
			} else {
				throw new RuntimeException(e);
			}
		}
	}

	@Override
	public boolean canUndo() {
		boolean ret = ((ICreateFeature) getFeature()).canUndo((ICreateContext) getContext());
		return ret;
	}

	@Override
	public void undo() {
	}
}