org.apache.commons.jexl.parser.ASTNotNode Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.jexl.parser;
import org.apache.commons.jexl.JexlContext;
import org.apache.commons.jexl.util.Coercion;
/**
* Not : 'not' or '!'.
*
* @author Geir Magnusson Jr.
* @version $Id: ASTNotNode.java 480412 2006-11-29 05:11:23Z bayard $
*/
public class ASTNotNode extends SimpleNode {
/**
* Create the node given an id.
*
* @param id node id.
*/
public ASTNotNode(int id) {
super(id);
}
/**
* Create a node with the given parser and id.
*
* @param p a parser.
* @param id node id.
*/
public ASTNotNode(Parser p, int id) {
super(p, id);
}
/** {@inheritDoc} */
public Object jjtAccept(ParserVisitor visitor, Object data) {
return visitor.visit(this, data);
}
/** {@inheritDoc} */
public Object value(JexlContext jc) throws Exception {
Object val = ((SimpleNode) jjtGetChild(0)).value(jc);
/*
* coercion rules
*/
Boolean b = Coercion.coerceBoolean(val);
if (b != null) {
return b.booleanValue() ? Boolean.FALSE : Boolean.TRUE;
}
throw new Exception("expression not boolean valued");
}
}