/*******************************************************************************
*
* 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 org.overture.ast.analysis.AnalysisException;
import org.overture.ast.expressions.ANotEqualBinaryExp;
import org.overture.ast.expressions.ASeqEnumSeqExp;
import org.overture.ast.expressions.PExp;
import org.overture.ast.factory.AstExpressionFactory;
import org.overture.ast.factory.AstFactory;
import org.overture.ast.types.AUnknownType;
import org.overture.pog.pub.IPOContextStack;
import org.overture.pog.pub.IPogAssistantFactory;
import org.overture.pog.pub.POType;
public class NonEmptySeqObligation extends ProofObligation
{
/**
*
*/
private static final long serialVersionUID = -8245417295117901422L;
public NonEmptySeqObligation(PExp exp, IPOContextStack ctxt,
IPogAssistantFactory af) throws AnalysisException
{
super(exp, POType.NON_EMPTY_SEQ, ctxt, exp.getLocation(), af);
// exp <> []
ASeqEnumSeqExp seqExp = new ASeqEnumSeqExp();
seqExp.setMembers(new LinkedList<PExp>()); // empty list
seqExp.setType(AstFactory.newASeqSeqType(null, new AUnknownType()));
ANotEqualBinaryExp notEqualsExp = AstExpressionFactory.newANotEqualBinaryExp(exp.clone(), seqExp);
stitch = notEqualsExp;
valuetree.setPredicate(ctxt.getPredWithContext(notEqualsExp));
}
}