org.eclipse.viatra2.gtasm.patternmatcher.incremental/src/org/eclipse/viatra2/gtasm/patternmatcher/incremental/RetePatternMatcherFactory.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 org.eclipse.viatra2.gtasm.interpreter.exception.ViatraTransformationException;
import org.eclipse.viatra2.gtasm.interpreter.executionEnvironment.IExecutionEnvironment;
import org.eclipse.viatra2.gtasm.patternmatcher.exceptions.PatternMatcherCompileTimeException;
import org.eclipse.viatra2.gtasm.patternmatcher.extension.IPatternMatcherFactory;
import org.eclipse.viatra2.gtasm.patternmatcher.incremental.rete.construction.RetePatternBuildException;
import org.eclipse.viatra2.gtasm.patternmatcher.patterns.IPatternMatcher;
import org.eclipse.viatra2.gtasmmodel.gtasm.metamodel.gt.GTPattern;


/**
 * @author Bergmann Gábor
 *
 */
public class RetePatternMatcherFactory implements IPatternMatcherFactory {

	public IPatternMatcher getPatternMatcher(IExecutionEnvironment env,
			GTPattern pattern) throws ViatraTransformationException {
		try {
			return new ReteGTASMPatternMatcher(
					EngineManager.getInstance()
					.getReteEngine(env.getFramework())
					.accessMatcher(pattern)
					);
		} catch (RetePatternBuildException e) {
			String templateMessage = e.getTemplateMessage();
			String[] templateContext = e.getTemplateContext();
			Object patternDescription = e.getPatternDescription();
			if (patternDescription!=null && patternDescription instanceof GTPattern && !patternDescription.equals(pattern)) 
				throw new PatternMatcherCompileTimeException(templateMessage, templateContext, 
						(GTPattern) patternDescription, e).addNewStackElement(pattern);
			else throw new PatternMatcherCompileTimeException(templateMessage, templateContext, pattern, e);
		}
	}

}