org.eclipse.viatra2.gtasm.patternmatcher.impl/src/org/eclipse/viatra2/gtasm/patternmatcher/impl/patternmatcher/internal/operation/PatternCallOperation.java

/*******************************************************************************
 * Copyright (c) 2004-2008 Akos Horvath, Gergely Varro 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, Gergely Varro - initial API and implementation
 *******************************************************************************/

 package org.eclipse.viatra2.gtasm.patternmatcher.impl.patternmatcher.internal.operation;

import java.util.Set;

import org.eclipse.viatra2.gtasm.patternmatcher.exceptions.PatternMatcherRuntimeException;
import org.eclipse.viatra2.gtasm.patternmatcher.impl.patternmatcher.internal.MatchingFrame;
import org.eclipse.viatra2.gtasm.patternmatcher.impl.patternmatcher.internal.callgraph.PatternNode;
import org.eclipse.viatra2.gtasmmodel.gtasm.metamodel.asm.core.AnnotatedElement;


/**
 * Represents a pattern call operation in a recursive pattern
 * variant. Such operation is contained by only non-recursive
 * FlattenedPatterns.
 */
public class PatternCallOperation extends SearchPlanOperation {
	private PatternNode calledPattern = null;
	private Integer[] callFormalToActualMapping = null;
	private Boolean[] adornment = null;
	
	public PatternCallOperation(PatternNode calledPattern, 
			Integer[] parameterMapping, 
			Boolean[] boundParameters) {
		assert parameterMapping.length == boundParameters.length;
		this.calledPattern = calledPattern;
		this.callFormalToActualMapping = parameterMapping;
		this.adornment = boundParameters;
	}
	
	public void calculateSidewaysPassedVariables(Set<Integer> variableSet) {
		for (int i = 0; i < callFormalToActualMapping.length; i++) {
			variableSet.add(callFormalToActualMapping[i]);
			if (!adornment[i]) {
				variableSet.remove(callFormalToActualMapping[i]);
			}
		}
	}
	
	public void calculateLocalVariables(Set<Integer> variableSet) {
		for (int i = 0; i < callFormalToActualMapping.length; i++) {
			variableSet.add(callFormalToActualMapping[i]);
		}
	}
	
	public PatternNode getPatternNode() {
		return calledPattern;
	}
	
	public Boolean[] getAdornment() {
		return adornment;
	}

	public Integer[] getParameterMapping() {
		return callFormalToActualMapping;
	}
	
	public String toString(){
		StringBuffer b = new StringBuffer();
		b.append(getClass().getSimpleName());
		b.append(" : ");
		b.append(calledPattern.getPattern().getName());
		b.append("^");
		
		StringBuffer params = new StringBuffer();
		assert adornment.length == callFormalToActualMapping.length;
		for (int i = 0; i < adornment.length; i++) {
			b.append((adornment[i] ? 'b' : 'f'));
			params.append(callFormalToActualMapping[i]);
		}
		b.append("(");
		b.append(params);
		b.append(")");
		return b.toString();
	}

	@Override
	public boolean execute(MatchingFrame frame) throws PatternMatcherRuntimeException {
		return false;
	}

	@Override
	public void postprocess(MatchingFrame frame) throws PatternMatcherRuntimeException {
	}

	@Override
	public void preprocess(MatchingFrame frame) throws PatternMatcherRuntimeException {
	}

	public AnnotatedElement getErrorfulElement(MatchingFrame frame) {
		return null;
	}
}