/**
  *
  *                      OOAS Compiler
  *
  *       Copyright 2015, AIT Austrian Institute of Technology.
  * This code is based on the C# Version of the OOAS Compiler, which is
  * copyright 2015 by the Institute of Software Technology, Graz University
  * of Technology with portions copyright by the AIT Austrian Institute of
  * Technology. All rights reserved.
  *
  * SEE THE "LICENSE" FILE FOR THE TERMS UNDER WHICH THIS FILE IS PROVIDED.
  *
  * If you modify the file please update the list of contributors below to in-
  * clude your name. Please also stick to the coding convention of using TABs
  * to do the basic (block-level) indentation and spaces for anything after
  * that. (Enable the display of special chars and it should be pretty obvious
  * what this means.) Also, remove all trailing whitespace.
  *
  * Contributors:
  *               Willibald Krenn (AIT)
  *               Stephan Zimmerer (AIT)
  *               Markus Demetz (AIT)
  *               Christoph Czurda (AIT)
  *
  */


package org.momut.ooas.ast.identifiers;

import org.antlr.runtime.Token;
import org.momut.ooas.ast.IScope;
import org.momut.ooas.ast.types.Type;
import org.momut.ooas.parser.SymbolTable;

///////////////////////////////////////////////
///  Scope Identifiers
///
public abstract class Scope extends TypeIdentifier implements IScope
{
	protected SymbolTable m_symbolTable;

	public Scope(Token aToken,
			Type aType,
			IdentifierKind aKind,
			IScope aDefiningScope)
	{
		super (aToken, aType, aKind, aDefiningScope);
		m_symbolTable = new SymbolTable();
	}


	public Scope(String aName,
			Type aType,
			IdentifierKind aKind,
			IScope aDefiningScope)
	{
		super (aName, aType, aKind, aDefiningScope);
		m_symbolTable = new SymbolTable();
	}

	public Scope(Scope toCopy)
	{
		super (toCopy);
		m_symbolTable = toCopy.symbolTable();
	}


	public SymbolTable symbolTable() { return m_symbolTable; }

	@Override
	public IScope GetParentScope()
	{
		return m_definingScope;
	}

	@Override
	public void SetParentScope(IScope parentScope)
	{
		m_definingScope = parentScope;
	}

	public /*virtual*/ void AddIdentifier(Identifier anIdentifier, Object tag)
	{
		m_symbolTable.AddIdentifier(anIdentifier);
	}

	public Identifier ResolveIdentifier(String aName)
	{
		if (m_symbolTable.Defined(aName))
			return m_symbolTable.Get(aName);
		else
			return null;
	}

}