/*******************************************************************************
*
* 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.List;
import java.util.Vector;
import org.overture.ast.analysis.AnalysisException;
import org.overture.ast.expressions.ABooleanConstExp;
import org.overture.ast.expressions.AExistsExp;
import org.overture.ast.expressions.ALetBeStExp;
import org.overture.ast.lex.LexBooleanToken;
import org.overture.ast.patterns.PMultipleBind;
import org.overture.ast.statements.ALetBeStStm;
import org.overture.pog.pub.IPOContextStack;
import org.overture.pog.pub.IPogAssistantFactory;
import org.overture.pog.pub.POType;
public class LetBeExistsObligation extends ProofObligation
{
private static final long serialVersionUID = 4190499967249305830L;
public LetBeExistsObligation(ALetBeStExp exp, IPOContextStack ctxt,
IPogAssistantFactory af) throws AnalysisException
{
super(exp, POType.LET_BE_EXISTS, ctxt, exp.getBind().getLocation(), af);
/**
* let <binds> be st <predicate> in <exp> produces exists <binds> & <predicate>
*/
AExistsExp exists = new AExistsExp();
List<PMultipleBind> bindList = new Vector<PMultipleBind>();
bindList.add(exp.getBind().clone());
exists.setBindList(bindList);
if (exp.getSuchThat() != null)
{
exists.setPredicate(exp.getSuchThat().clone());
} else
{
// we just use true since we cannot have
// exists by itself
ABooleanConstExp replacementNothing_exp = new ABooleanConstExp();
replacementNothing_exp.setValue(new LexBooleanToken(true, null));
exists.setPredicate(replacementNothing_exp);
}
stitch = exists;
valuetree.setPredicate(ctxt.getPredWithContext(exists));
}
public LetBeExistsObligation(ALetBeStStm stmt, IPOContextStack ctxt,
IPogAssistantFactory af) throws AnalysisException
{
super(stmt, POType.LET_BE_EXISTS, ctxt, stmt.getBind().getLocation(), af);
AExistsExp exists = new AExistsExp();
List<PMultipleBind> bindList = new Vector<PMultipleBind>();
bindList.add(stmt.getBind().clone());
exists.setBindList(bindList);
if (stmt.getSuchThat() != null)
{
exists.setPredicate(stmt.getSuchThat().clone());
} else
{
// we just use true since we cannot have
// exists by itself
ABooleanConstExp replacementNothing_exp = new ABooleanConstExp();
replacementNothing_exp.setValue(new LexBooleanToken(true, null));
exists.setPredicate(replacementNothing_exp);
}
stitch = exists;
valuetree.setPredicate(ctxt.getPredWithContext(exists));
}
}