OoasTools

/**

  *

  *                      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.statements;

import org.momut.ooas.utils.exceptions.InternalCompilerException;

///////////////////////////////////////////////

///  Guarded Command

///

public final class GuardedCommand extends Statement implements IScope

{

	private Expression m_guard;

	private Statement m_body;

	private boolean m_isQualitative;

	private IScope m_parentScope;

	public Expression guard() { return m_guard; }

	public Statement body() { return m_body; }

	public boolean isQualitative() { return m_isQualitative; }

	public GuardedCommand(Expression aGuard, Block aBlock, int aline, int apos)

	{

		super (StatementKind.GuardedCommand, aline, apos);

		m_guard = aGuard;

		m_isQualitative = false;

		m_body = aBlock;

		checkBody();

	}

	public GuardedCommand(GuardedCommand toCopy)

	{

		super (toCopy);

		m_guard = toCopy.m_guard;

		m_body = toCopy.m_body;

		m_isQualitative = toCopy.m_isQualitative;

		m_parentScope = toCopy.m_parentScope;

	}

	@Override

	public /*override*/ Statement Clone()

	{

		return new GuardedCommand(this);

	}

	@Override

	public /*override*/ void Accept(IAstVisitor visitor)

	{

		visitor.visit(this);

	}

	public void SetGuard(Expression newGuard)

	{

		if (newGuard == null)

			throw new ArgumentException();

		m_guard = newGuard;

	}

	public void SetBody(Statement newBody)

	{

		if (newBody == null)

			throw new ArgumentException();

		m_body = newBody;

		checkBody();

	}

	private void checkBody() {

		if (m_body instanceof IScope) {

			final IScope s = (IScope) m_body;

			if (s.GetParentScope() == null)

				s.SetParentScope(this);

			else if (s.GetParentScope() != this)

				throw new InternalCompilerException("Internal Error: GuardedCommandBody has parent set to different method than it was added to.");

		}

	}

	public void SetIsQualitative(boolean newVal)

	{

		m_isQualitative = newVal;

	}

	@Override

	public Identifier ResolveIdentifier(String aName) {

		return null;

	}

	@Override

	public IScope GetParentScope() {

		return m_parentScope;

	}

	@Override

	public void SetParentScope(IScope parentScope) {

		m_parentScope = parentScope;

	}

	@Override

	public void AddIdentifier(Identifier anIdentifier, Object tag) {

		throw new InternalCompilerException("Cannot add identifier to guarded command.");

	}

}