org.apache.commons.jexl.parser.ASTDivNode Maven / Gradle / Ivy
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* 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.util.Coercion;
import org.apache.commons.jexl.JexlContext;
/**
* a / b, mathematical divide.
*
* @author Geir Magnusson Jr.
* @version $Id: ASTDivNode.java 480412 2006-11-29 05:11:23Z bayard $
*/
public class ASTDivNode extends SimpleNode {
/**
* Create the node given an id.
*
* @param id node id.
*/
public ASTDivNode(int id) {
super(id);
}
/**
* Create a node with the given parser and id.
*
* @param p a parser.
* @param id node id.
*/
public ASTDivNode(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 left = ((SimpleNode) jjtGetChild(0)).value(jc);
Object right = ((SimpleNode) jjtGetChild(1)).value(jc);
/*
* the spec says 'and', I think 'or'
*/
if (left == null && right == null) {
return new Byte((byte) 0);
}
Double l = Coercion.coerceDouble(left);
Double r = Coercion.coerceDouble(right);
/*
* catch div/0
*/
if (r.doubleValue() == 0.0) {
return new Double(0.0);
}
return new Double(l.doubleValue() / r.doubleValue());
}
}