/*******************************************************************************
*
* 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.contexts;
import java.util.List;
import org.overture.ast.expressions.AEqualsBinaryExp;
import org.overture.ast.expressions.AExistsExp;
import org.overture.ast.expressions.AImpliesBooleanBinaryExp;
import org.overture.ast.expressions.ANotUnaryExp;
import org.overture.ast.expressions.PExp;
import org.overture.ast.factory.AstExpressionFactory;
import org.overture.ast.patterns.PMultipleBind;
import org.overture.ast.patterns.PPattern;
import org.overture.ast.types.PType;
import org.overture.pog.pub.IPogAssistantFactory;
import org.overture.pog.utility.ContextHelper;
import org.overture.pog.utility.UniqueNameGenerator;
public class PONotCaseContext extends POContext
{
public final PPattern pattern;
public final PType type;
public final PExp exp;
public final IPogAssistantFactory assistantFactory;
public PONotCaseContext(PPattern pattern, PType type, PExp exp,
IPogAssistantFactory assistantFactory)
{
this.pattern = pattern;
this.type = type;
this.exp = exp;
this.assistantFactory = assistantFactory;
}
@Override
public PExp getContextNode(PExp stitch)
{
AImpliesBooleanBinaryExp impliesExp = AstExpressionFactory.newAImpliesBooleanBinaryExp(getCaseExp(), stitch);
return impliesExp;
}
private PExp getCaseExp()
{
if (assistantFactory.createPPatternAssistant().isSimple(pattern))
{
ANotUnaryExp notExp = new ANotUnaryExp();
AEqualsBinaryExp equalsExp = AstExpressionFactory.newAEqualsBinaryExp(patternToExp(pattern.clone(), assistantFactory, new UniqueNameGenerator(exp)), exp.clone());
notExp.setExp(equalsExp);
return notExp;
} else
{
ANotUnaryExp notExp = new ANotUnaryExp();
AExistsExp existsExp = new AExistsExp();
List<PMultipleBind> bindList = ContextHelper.bindListFromPattern(pattern.clone(), type.clone());
existsExp.setBindList(bindList);
PExp matching = patternToExp(pattern,assistantFactory,new UniqueNameGenerator(exp));
AEqualsBinaryExp equalsExp = AstExpressionFactory.newAEqualsBinaryExp(matching, exp.clone());
existsExp.setPredicate(equalsExp);
notExp.setExp(existsExp);
return notExp;
}
}
@Override
public String getContext()
{
return "";
}
}