plugins/org.eclipse.viatra2.gtasm.patternmatcher.incremental/src/org/eclipse/viatra2/gtasm/patternmatcher/incremental/ReteMatching.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.HashMap;


import org.eclipse.viatra2.gtasm.patternmatcher.IMatching;
import org.eclipse.viatra2.gtasm.patternmatcher.incremental.rete.tuple.Tuple;
import org.eclipse.viatra2.gtasmmodel.gtasm.metamodel.asm.definitions.Variable;

/**
 * @author Gabor Bergmann
 * 
 */
class ReteMatching implements IMatching {
	private Tuple substitutions;
	private HashMap<Object, Integer> positionMapping;

	/**
	 * @param substitutions
	 * @param positionMapping
	 */
	public ReteMatching(Tuple substitutions,
			HashMap<Object, Integer> positionMapping) {
		super();
		this.substitutions = substitutions;
		this.positionMapping = positionMapping;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.viatra2.gtasm.patternmatcher.IMatching#lookup(int)
	 */
	public Object lookup(int position) {
		return substitutions.get(position);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.viatra2.gtasm.patternmatcher.IMatching#lookup(hu.bme.mit.viatra.gtasmmodel.gtasm
	 * .metamodel.asm.definitions.Variable)
	 */
	public Object lookup(Variable variable) {
		return substitutions.get(positionMapping.get(variable));
	}
	
	/* (non-Javadoc)
	 * @see java.lang.Object#toString()
	 */
	@Override
	public String toString() {
		return "Matching: " + substitutions.toString();
	}

}