package org.jacorb.notification.filter.etcl;
/*
* JacORB - a free Java ORB
*
* Copyright (C) 1999-2014 Gerald Brose / The JacORB Team.
*
* 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.
*
*/
import org.jacorb.notification.filter.EvaluationContext;
import org.jacorb.notification.filter.EvaluationException;
import org.jacorb.notification.filter.EvaluationResult;
import antlr.Token;
/**
* A simple node to represent MINUS operation
*/
public class MinusOperator extends UnaryOperator {
private boolean unary_;
private static final String NAME = "MinusOperator";
public MinusOperator(Token tok) {
super(tok);
setName(NAME);
}
public void setType(int type) {
unary_ = (type == UNARY_MINUS);
}
public String toString() {
return " -";
}
public EvaluationResult evaluate(EvaluationContext context,
EvaluationResult left)
throws EvaluationException {
if (unary_) {
return EvaluationResult.unaryMinus(left);
}
return EvaluationResult.minus(left,
right().evaluate(context));
}
public void acceptInOrder(AbstractTCLVisitor visitor) throws VisitorException {
left().acceptInOrder(visitor);
visitor.visitMinus(this);
if (!unary_) {
right().acceptInOrder(visitor);
}
}
public void acceptPostOrder(AbstractTCLVisitor visitor) throws VisitorException {
left().acceptPostOrder(visitor);
if (!unary_) {
right().acceptPostOrder(visitor);
}
visitor.visitMinus(this);
}
public void acceptPreOrder(AbstractTCLVisitor visitor) throws VisitorException {
visitor.visitMinus(this);
left().acceptPreOrder(visitor);
if (!unary_) {
right().acceptPreOrder(visitor);
}
}
}