/*
* #%~
* The VDM Type Checker
* %%
* 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
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/gpl-3.0.html>.
* #~%
*/
package org.overture.typechecker.utilities.type;
import org.overture.ast.analysis.AnalysisException;
import org.overture.ast.factory.AstFactory;
import org.overture.ast.node.NodeList;
import org.overture.ast.types.ANamedInvariantType;
import org.overture.ast.types.AOptionalType;
import org.overture.ast.types.AProductType;
import org.overture.ast.types.AUnionType;
import org.overture.ast.types.AUnknownType;
import org.overture.ast.types.PType;
import org.overture.ast.types.SInvariantType;
import org.overture.typechecker.assistant.ITypeCheckerAssistantFactory;
/**
* Used to get a Product type from a type
*
* @author kel
*/
public class ProductTypeFinder extends TypeUnwrapper<AProductType>
{
protected ITypeCheckerAssistantFactory af;
public ProductTypeFinder(ITypeCheckerAssistantFactory af)
{
this.af = af;
}
@Override
public AProductType defaultSInvariantType(SInvariantType type)
throws AnalysisException
{
if (type instanceof ANamedInvariantType)
{
return ((ANamedInvariantType) type).getType().apply(THIS);
} else
{
return null;
}
}
@Override
public AProductType caseAProductType(AProductType type)
throws AnalysisException
{
return type;
}
@Override
public AProductType caseAOptionalType(AOptionalType node)
throws AnalysisException
{
return node.getType().apply(THIS);
}
@Override
public AProductType caseAUnionType(AUnionType type)
throws AnalysisException
{
// return af.createAUnionTypeAssistant().getProduct(type, 0);
return type.apply(af.getProductExtendedTypeFinder(), 0);
}
@Override
public AProductType caseAUnknownType(AUnknownType type)
throws AnalysisException
{
return AstFactory.newAProductType(type.getLocation(), new NodeList<PType>(null));
}
@Override
public AProductType defaultPType(PType type) throws AnalysisException
{
assert false : "cannot getProduct from non-product type";
return null;
}
}