Exists1QuantifierStrategy.java

/*
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 * VDM Code Generator
 * %%
 * Copyright (C) 2008 - 2014 Overture
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
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 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
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 * You should have received a copy of the GNU General Public
 * License along with this program.  If not, see
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package org.overture.codegen.trans.quantifier;

import java.util.List;

import org.overture.codegen.ir.ITempVarGen;
import org.overture.codegen.ir.SExpIR;
import org.overture.codegen.ir.SPatternIR;
import org.overture.codegen.ir.SStmIR;
import org.overture.codegen.ir.analysis.AnalysisException;
import org.overture.codegen.ir.declarations.AVarDeclIR;
import org.overture.codegen.ir.expressions.AIdentifierVarExpIR;
import org.overture.codegen.ir.patterns.AIdentifierPatternIR;
import org.overture.codegen.trans.IterationVarPrefixes;
import org.overture.codegen.trans.assistants.TransAssistantIR;
import org.overture.codegen.trans.iterator.ILanguageIterator;

public class Exists1QuantifierStrategy extends QuantifierBaseStrategy
{
	protected Exists1CounterData counterData;

	public Exists1QuantifierStrategy(TransAssistantIR transformationAssistant,
			SExpIR predicate, String resultVarName,
			ILanguageIterator langIterator, ITempVarGen tempGen,
			IterationVarPrefixes iteVarPrefixes, Exists1CounterData counterData)
	{
		super(transformationAssistant, predicate, resultVarName, langIterator, tempGen, iteVarPrefixes);

		this.counterData = counterData;
	}

	@Override
	public List<AVarDeclIR> getOuterBlockDecls(AIdentifierVarExpIR setVar,
			List<SPatternIR> patterns) throws AnalysisException
	{
		if (firstBind)
		{
			AIdentifierPatternIR name = new AIdentifierPatternIR();
			name.setName(resultVarName);

			return packDecl(transAssist.getInfo().getDeclAssistant().consLocalVarDecl(counterData.getType().clone(), name, counterData.getExp().clone()));
		} else
		{
			return null;
		}
	}

	@Override
	public SExpIR getForLoopCond(AIdentifierVarExpIR setVar,
			List<SPatternIR> patterns, SPatternIR pattern)
			throws AnalysisException
	{
		SExpIR left = langIterator.getForLoopCond(setVar, patterns, pattern);
		SExpIR right = transAssist.consLessThanCheck(resultVarName, 2);

		return transAssist.consAndExp(left, right);
	}

	@Override
	public List<SStmIR> getForLoopStms(AIdentifierVarExpIR setVar,
			List<SPatternIR> patterns, SPatternIR pattern)
	{
		return lastBind
				? packStm(transAssist.consConditionalIncrement(resultVarName, predicate))
				: null;
	}
}