org.eclipse.gmf.examples.runtime.diagram.decorator/src/org/eclipse/gmf/examples/runtime/diagram/decorator/provider/ReviewDecoratorProvider.java

/******************************************************************************
 * Copyright (c) 2005, 2008 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.gmf.examples.runtime.diagram.decorator.provider;

import org.eclipse.core.runtime.Assert;
import org.eclipse.gmf.runtime.common.core.service.AbstractProvider;
import org.eclipse.gmf.runtime.common.core.service.IOperation;
import org.eclipse.gmf.runtime.diagram.ui.services.decorator.CreateDecoratorsOperation;
import org.eclipse.gmf.runtime.diagram.ui.services.decorator.IDecoratorProvider;
import org.eclipse.gmf.runtime.diagram.ui.services.decorator.IDecoratorTarget;
import org.eclipse.gmf.runtime.notation.Node;


/**
 * @author sshaw
 *
 * Decorator provider for the review decorator class
 */
public class ReviewDecoratorProvider
	extends AbstractProvider
	implements IDecoratorProvider {

	/** The key used for the mood decoration */
	public static final String REVIEW = "Review_Decorator"; //$NON-NLS-1$
	
	public void createDecorators(IDecoratorTarget decoratorTarget) {
		Node node = ReviewDecorator.getDecoratorTargetNode(decoratorTarget);
		if (node != null) {
			decoratorTarget.installDecorator(REVIEW, new ReviewDecorator(decoratorTarget));
		}
	}

	/* (non-Javadoc)
	 * @see org.eclipse.gmf.runtime.common.core.internal.service.IProvider#provides(org.eclipse.gmf.runtime.common.core.service.IOperation)
	 */
	public boolean provides(IOperation operation) {
		Assert.isNotNull(operation);

		if (!(operation instanceof CreateDecoratorsOperation)) {
			return false;
		}

		IDecoratorTarget decoratorTarget = ((CreateDecoratorsOperation) operation)
			.getDecoratorTarget();
		return ReviewDecorator.getDecoratorTargetNode(decoratorTarget) != null;
	}

}