[JEXL-104] NPE in JexlArithmetic when an Array-Expression containing a null is used.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.1
• Fix Version/s: 2.1
• Assignee: Henri Biestro
• Reporter: Andreas Haufler
• Created: 11/Aug/10 10:04
• Updated: 14/Dec/11 09:33
• Resolved: 11/Aug/10 18:32

Description

When using the Array-Expression like [x, y, z] a NPE occurs when one of the array elements is null.

Example:

import org.apache.commons.jexl2.Expression;
import org.apache.commons.jexl2.JexlEngine;
import org.apache.commons.jexl2.MapContext;

public class JexlArithmeticBug {
public static void main(String[] args)

{ JexlEngine engine = new JexlEngine(); String jexlExp = "[null, null]"; Expression e = engine.createExpression(jexlExp); System.out.println(e.evaluate(new MapContext())); }

}

As one can see in the Stacktrace, JexlArithmetic.narrowArrayType doesn't expect null values at all.