/*******************************************************************************
 * Copyright (c) 2004-2008 Andras Balogh 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:
 *    Andras Balogh - initial API and implementation
 *******************************************************************************/

 package org.eclipse.viatra2.imports.vtml;

import java.util.Stack;

import org.eclipse.viatra2.core.IEntity;
import org.eclipse.viatra2.core.IModelManager;
import org.eclipse.viatra2.core.IModelSpace;
import org.eclipse.viatra2.core.IRelation;
import org.eclipse.viatra2.errors.VPMRuntimeException;
import org.eclipse.viatra2.logger.Logger;

/**
 * @author babo
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class VTMLMetaModelHelper {
	
	private static VTMLMetaModelHelper instance;
	
	private static Logger log = null;
	private IModelSpace modsp;
	private IModelManager mm;
	
	public IModelSpace getMSpace() { return modsp;}
	
	
	Stack conts = new Stack();
	
	public void addContainer(IEntity e)
	{
		conts.push(e);
	}
	public IEntity currentContainer()
	{
		return (IEntity)conts.peek();
	}
	public IEntity removeContainer()
	{
		return (IEntity)conts.pop();
	}
	public static VTMLMetaModelHelper getInstance() {
		if (instance==null) instance = new VTMLMetaModelHelper();
		if (instance.log==null) return null;
		return instance;
	}
	
	private VTMLMetaModelHelper()
	{
		
	}
	
	public static void init(Logger l, IModelSpace ms, ASTBuilder a) throws VPMRuntimeException
	{
		log = l;
		getInstance().modsp = ms;
		getInstance().mm = ms.getModelManager();
		getInstance().ab=a;
		getInstance().loadMetaModel();
	}
	private IEntity ent(String fqn)
	{
		IEntity ret=mm.getEntityByName(fqn);
		if(ret==null)
			throw new RuntimeException("invalid model");
		return ret;
	}
	private IRelation rel(String fqn)
	{
		IRelation ret=mm.getRelationByName(fqn);
		if(ret==null)
			throw new RuntimeException("invalid model");
		return ret;
	}
	public static void deleteInstance()
	{
		instance = null;
	}
	
	private void loadMetaModel() throws VPMRuntimeException
	{
		
	}

	IEntity machine;
	ASTBuilder ab;
	public ASTBuilder getASTBuilder()
	{
		return ab;
	}
	
}