/*
* JacORB - a free Java ORB
*
* Copyright (C) 1999-2004 Gerald Brose
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
package org.jacorb.notification.filter.etcl;
import org.jacorb.notification.filter.EvaluationContext;
import org.jacorb.notification.filter.EvaluationException;
import org.jacorb.notification.filter.EvaluationResult;
import antlr.Token;
/**
* @author Alphonse Bendt
* @version $Id: BinaryOperator.java,v 1.3 2005-08-21 13:24:38 alphonse.bendt Exp $
*/
public abstract class BinaryOperator extends UnaryOperator
{
public BinaryOperator(Token tok)
{
super(tok);
}
protected final EvaluationResult evaluate(EvaluationContext context,
EvaluationResult left)
throws EvaluationException
{
EvaluationResult _right = right().evaluate(context);
return evaluate(context, left, _right);
}
protected abstract EvaluationResult evaluate(EvaluationContext context,
EvaluationResult left, EvaluationResult rightNode) throws EvaluationException;
public final void acceptInOrder(AbstractTCLVisitor visitor) throws VisitorException {
left().acceptInOrder(visitor);
visitThis(visitor);
right().acceptInOrder(visitor);
}
public final void acceptPostOrder(AbstractTCLVisitor visitor) throws VisitorException {
left().acceptPostOrder(visitor);
right().acceptPostOrder(visitor);
visitThis(visitor);
}
public final void acceptPreOrder(AbstractTCLVisitor visitor) throws VisitorException {
visitThis(visitor);
left().acceptPreOrder(visitor);
right().acceptPreOrder(visitor);
}
protected abstract void visitThis(AbstractTCLVisitor visitor) throws VisitorException;
}