/*
 *        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: UnaryOperator.java,v 1.2 2005-02-14 00:07:08 alphonse.bendt Exp $
 */
abstract class UnaryOperator extends AbstractTCLNode
{
    public UnaryOperator(Token tok)
    {
        super(tok);
    }

    public final EvaluationResult evaluate(EvaluationContext context) throws EvaluationException {
        EvaluationResult _left = left().evaluate(context);  

        return evaluate(context, _left);
    }
    
    protected abstract EvaluationResult evaluate(EvaluationContext context, 
            EvaluationResult left) throws EvaluationException;
    
}

