/*******************************************************************************
*
* Copyright (C) 2008 Fujitsu Services Ltd.
*
* Author: Nick Battle
*
* This file is part of VDMJ.
*
* VDMJ is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* VDMJ 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.
*
* You should have received a copy of the GNU General Public License
* along with VDMJ. If not, see <http://www.gnu.org/licenses/>.
*
******************************************************************************/
package org.overture.pog.obligation;
import java.util.LinkedList;
import java.util.List;
import org.overture.ast.analysis.AnalysisException;
import org.overture.ast.expressions.AForAllExp;
import org.overture.ast.expressions.AImpliesBooleanBinaryExp;
import org.overture.ast.expressions.AMapCompMapExp;
import org.overture.ast.expressions.AMapDomainUnaryExp;
import org.overture.ast.expressions.ASetCompSetExp;
import org.overture.ast.expressions.ASetEnumSetExp;
import org.overture.ast.expressions.PExp;
import org.overture.ast.factory.AstExpressionFactory;
import org.overture.ast.intf.lex.ILexNameToken;
import org.overture.ast.patterns.AIdentifierPattern;
import org.overture.ast.patterns.ASetMultipleBind;
import org.overture.ast.patterns.PMultipleBind;
import org.overture.ast.patterns.PPattern;
import org.overture.pog.pub.IPOContextStack;
import org.overture.pog.pub.IPogAssistantFactory;
import org.overture.pog.pub.POType;
public class MapInjectivityComp extends ProofObligation
{
/**
*
*/
private static final long serialVersionUID = 6082219504509442557L;
public MapInjectivityComp(PExp exp, IPOContextStack ctxt,
IPogAssistantFactory af) throws AnalysisException
{
super(exp, POType.MAP_INJ_COMP, ctxt, exp.getLocation(), af);
stitch = buildPredicate(exp.clone());
valuetree.setPredicate(ctxt.getPredWithContext(stitch));
}
public MapInjectivityComp(AMapCompMapExp exp, IPOContextStack ctxt,
IPogAssistantFactory af) throws AnalysisException
{
super(exp, POType.MAP_INJ_COMP, ctxt, exp.getLocation(), af);
stitch = buildPredicate(exp.clone());
valuetree.setPredicate(ctxt.getPredWithContext(stitch));
}
private PPattern makePattern(ILexNameToken name)
{
AIdentifierPattern pattern = new AIdentifierPattern();
pattern.setName(name);
return pattern;
}
private PExp buildPredicate(PExp mapExp)
{
/*
* forall m1, m2 in set exp & -- set of maps forall d1 in set dom m1, d2 in set dom m2 & (d1 = d2) => (m1(d1) =
* m2(d2))
*/
ILexNameToken m1 = getUnique("m");
ILexNameToken m2 = getUnique("m");
PPattern p1 = makePattern(m1);
PPattern p2 = makePattern(m2);
ASetMultipleBind setBind = new ASetMultipleBind();
if (mapExp instanceof AMapCompMapExp)
{
AMapCompMapExp mapCompExp = (AMapCompMapExp) mapExp;
ASetCompSetExp setExp = new ASetCompSetExp();
ASetEnumSetExp setEnumExp = new ASetEnumSetExp();
List<PExp> member = new LinkedList<PExp>();
member.add(mapCompExp.getFirst().clone());
setEnumExp.setMembers(member);
setExp.setFirst(setEnumExp);
setExp.setBindings(cloneListMultipleBind(mapCompExp.getBindings()));
if (mapCompExp.getPredicate() != null)
{
setExp.setPredicate(mapCompExp.getPredicate().clone());
}
setBind.setSet(setExp);
} else
{
setBind.setSet(mapExp.clone());
}
List<PPattern> patternList = new LinkedList<PPattern>();
patternList.add(p1);
patternList.add(p2);
setBind.setPlist(patternList);
AForAllExp domForallExp = new AForAllExp();
ILexNameToken d1 = getUnique("d");
ILexNameToken d2 = getUnique("d");
AMapDomainUnaryExp domM1 = new AMapDomainUnaryExp();
domM1.setExp(getVarExp(m1));
AMapDomainUnaryExp domM2 = new AMapDomainUnaryExp();
domM2.setExp(getVarExp(m2));
AImpliesBooleanBinaryExp implies = AstExpressionFactory.newAImpliesBooleanBinaryExp(getEqualsExp(getVarExp(d1), getVarExp(d2)), getEqualsExp(getApplyExp(getVarExp(m1), getVarExp(d1)), getApplyExp(getVarExp(m2), getVarExp(d2))));
List<PMultipleBind> domBinding = getMultipleSetBindList(domM1, d1);
domBinding.addAll(getMultipleSetBindList(domM2, d2));
domForallExp.setBindList(domBinding);
domForallExp.setPredicate(implies);
AForAllExp forallExp = new AForAllExp();
List<PMultipleBind> setBindList = new LinkedList<PMultipleBind>();
setBindList.add(setBind);
forallExp.setBindList(setBindList);
forallExp.setPredicate(domForallExp);
return forallExp;
}
}