/*******************************************************************************
 * Copyright (c) 2010-2011, Istvan Rath and Zoltan Ujhelyi
 * 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:
 *   Istvan Rath - initial API and implementation
 *******************************************************************************/

package org.eclipse.viatra2.visualisation.common.labelproviders.natives;

import org.eclipse.viatra2.core.IModelSpace;
import org.eclipse.viatra2.errors.VPMRuntimeException;
import org.eclipse.viatra2.logger.Logger;
import org.eclipse.viatra2.natives.ASMNativeFunction;
import org.eclipse.viatra2.visualisation.IVisualisationDescriptor;
import org.eclipse.viatra2.visualisation.VisualisationPlugin;

/**
 * @author Zoltan Ujhelyi
 *
 */
public abstract class AbstractVisualisationFunction implements
		ASMNativeFunction {
	
	protected IVisualisationDescriptor descriptor;

	/* (non-Javadoc)
	 * @see org.eclipse.viatra2.natives.ASMNativeFunction#evaluate(org.eclipse.viatra2.core.IModelSpace, java.lang.Object[])
	 */
	@Override
	public Object evaluate(IModelSpace msp, Object[] params)
			throws VPMRuntimeException {
		descriptor = VisualisationPlugin.getVisualisationManager().getVisualisation(msp.getFramework());
		if (descriptor != null) {
			return run(msp, params);
		} else {
			msp.getFramework().getLogger().message(Logger.WARNING, "Visualisation is not initialized");
			return Boolean.FALSE;
		}
	}

	protected abstract Object run(IModelSpace msp, Object[] params) throws VPMRuntimeException;

}