plugins/org.eclipse.viatra2.gtasm.patternmatcher.incremental/src/org/eclipse/viatra2/gtasm/patternmatcher/incremental/EngineManager.java

/*******************************************************************************
 * Copyright (c) 2004-2008 Gabor Bergmann and Daniel Varro
 * 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:
 *    Gabor Bergmann - initial API and implementation
 *******************************************************************************/

package org.eclipse.viatra2.gtasm.patternmatcher.incremental;

import java.util.Map;
import java.util.WeakHashMap;

import org.eclipse.viatra2.framework.FrameworkManager;
import org.eclipse.viatra2.framework.IFramework;
import org.eclipse.viatra2.framework.IFrameworkListChangedListener;
import org.eclipse.viatra2.gtasm.patternmatcher.incremental.adapters.MachineListener;
import org.eclipse.viatra2.gtasm.patternmatcher.incremental.rete.matcher.ReteEngine;
import org.eclipse.viatra2.gtasmmodel.gtasm.metamodel.gt.GTPattern;



/**
 * @author Gabor Bergmann
 * 
 */
public class EngineManager implements IFrameworkListChangedListener {

	private static EngineManager instance = new EngineManager();

	/**
	 * @return the instance
	 */
	public static EngineManager getInstance() {
		return instance;
	}

	// Map<IFramework, ReteEngine> engines = new HashMap<IFramework,
	// ReteEngine>();
	Map<IFramework, MachineListener> machineListeners;

	public EngineManager() {
		super();
		this.machineListeners = new WeakHashMap<IFramework, MachineListener>();
		FrameworkManager.getInstance().addFrameworkListChangedListener(this);
	}

	public ReteEngine<GTPattern> getReteEngine(IFramework framework) {
		// ReteEngine engine = engines.get(framework);
		// if (engine==null)
		// {
		// engine = new ReteEngine(framework);
		// engines.put(framework, engine);
		// }

		return getMachineListener(framework).getEngine();
	}
	
	public MachineListener getMachineListener(IFramework framework) {
		MachineListener l = machineListeners.get(framework);
		if (l == null) {
			l = new MachineListener(framework);
			machineListeners.put(framework, l);
		}
		return l;
	}

	public void frameworkAdded(IFramework f) {

	}

	public void frameworkRemoved(IFramework f) {
		MachineListener m = machineListeners.get(f);
		if (m != null)
			m.kill();
		machineListeners.remove(f);
	}
	
//	private int threads(GTPattern samplePattern) {
//		Machine machine = samplePattern.getNamespace();
//		machine.g
//		return 0;
//	}

}