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 EXIST operation */
public class ExistOperator extends AbstractTCLNode {
public ExistOperator(Token tok) {
super(tok);
}
public String toString() {
return "exist";
}
public EvaluationResult evaluate(EvaluationContext context)
throws EvaluationException {
// Message _event = context.getCurrentMessage();
switch(left().getType()) {
case IDENTIFIER:
break;
case DOLLAR:
ETCLComponentName _op = (ETCLComponentName)left();
try {
_op.evaluate(context);
return EvaluationResult.BOOL_TRUE;
} catch (EvaluationException e) {
return EvaluationResult.BOOL_FALSE;
}
// return _event.testExists(context,_op);
}
throw new RuntimeException();
}
public void acceptInOrder(AbstractTCLVisitor visitor) throws VisitorException {
left().acceptInOrder(visitor);
visitor.visitExist(this);
}
public void acceptPreOrder(AbstractTCLVisitor visitor) throws VisitorException {
visitor.visitExist(this);
left().acceptPreOrder(visitor);
}
public void acceptPostOrder(AbstractTCLVisitor visitor) throws VisitorException {
left().acceptPostOrder(visitor);
visitor.visitExist(this);
}
}