/*******************************************************************************
 * Copyright (c) 2004-2009 Akos Horvath 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:
 *    Akos Horvath - initial API and implementation
 *******************************************************************************/


/**
 * 
 */
package org.eclipse.viatra2.gtasm.patternmatcher.impl.patternmatcher.internal.searchgraph.traceability;

import java.util.ArrayList;

import org.eclipse.viatra2.gtasmmodel.gtasm.metamodel.asm.core.AnnotatedElement;


/**
 * For each VPM search graph element a traceability Element is created that can point to multiple GTASM element 
 * and its corresponding operation (either pattern or gtRule)
 * @author Akos Horvath
 *
 */
public abstract class AbstractTraceabilityElement<VPMType> {
	
	private ArrayList<AnnotatedElement> emfElements;
	
	public AbstractTraceabilityElement(){
		emfElements = new ArrayList<AnnotatedElement>();
	}
	
	public AbstractTraceabilityElement(AnnotatedElement element){
		emfElements = new ArrayList<AnnotatedElement>();
		if(element != null)
			emfElements.add(0, element);
	}
	
	/** Adds an EMF element to the traceability node. If it is the first one than it will become the representative one
	 * @param element
	 */
	public void addEMFElement(AnnotatedElement element){
		if(element != null)
			emfElements.add(element);
	}
	
	/** Adds the representative EMF element to the traceability node
	 * @param element
	 */
	public void addRepresentativeElement(AnnotatedElement element){
		if(element != null)
		{
			if(emfElements.get(0) != null)
				{
				AnnotatedElement _temp = emfElements.get(0);
				emfElements.add(0, element);
				emfElements.add(_temp);
				}
			else
				emfElements.add(0,element);
		}
	}
	
	/** Return the representative EMF element. 
	 * @return
	 */
	public AnnotatedElement getRepresentativeEMFElement(){
		return emfElements.get(0);
	}
	
	public abstract VPMType getVPMElement();
	
}