org.apache.commons.jexl.parser.ASTAddNode 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;
/**
* Addition : either integer addition or string concatenation.
*
* @author Geir Magnusson Jr.
* @version $Id: ASTAddNode.java 480412 2006-11-29 05:11:23Z bayard $
*/
public class ASTAddNode extends SimpleNode {
/**
* Create the node given an id.
*
* @param id node id.
*/
public ASTAddNode(int id) {
super(id);
}
/**
* Create a node with the given parser and id.
*
* @param p a parser.
* @param id node id.
*/
public ASTAddNode(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 context) throws Exception {
Object left = ((SimpleNode) jjtGetChild(0)).value(context);
Object right = ((SimpleNode) jjtGetChild(1)).value(context);
/*
* the spec says 'and'
*/
if (left == null && right == null) {
return new Long(0);
}
/*
* if anything is float, double or string with ( "." | "E" | "e")
* coerce all to doubles and do it
*/
if (left instanceof Float || left instanceof Double
|| right instanceof Float || right instanceof Double
|| (left instanceof String
&& (((String) left).indexOf(".") != -1
|| ((String) left).indexOf("e") != -1
|| ((String) left).indexOf("E") != -1)
)
|| (right instanceof String
&& (((String) right).indexOf(".") != -1
|| ((String) right).indexOf("e") != -1
|| ((String) right).indexOf("E") != -1)
)
) {
/*
* in the event that either is null and not both, then just make the
* null a 0
*/
try {
Double l = Coercion.coerceDouble(left);
Double r = Coercion.coerceDouble(right);
return new Double(l.doubleValue() + r.doubleValue());
} catch (java.lang.NumberFormatException nfe) {
/*
* Well, use strings!
*/
return left.toString().concat(right.toString());
}
}
/*
* attempt to use Longs
*/
try {
Long l = Coercion.coerceLong(left);
Long r = Coercion.coerceLong(right);
return new Long(l.longValue() + r.longValue());
} catch (java.lang.NumberFormatException nfe) {
/*
* Well, use strings!
*/
return left.toString().concat(right.toString());
}
}
}