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From "Andreas Haufler (JIRA)" <j...@apache.org>
Subject [jira] Created: (JEXL-104) NPE in JexlArithmetic when an Array-Expression containing a null is used.
Date Wed, 11 Aug 2010 10:05:17 GMT
NPE in JexlArithmetic when an Array-Expression containing a null is used.
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                 Key: JEXL-104
                 URL: https://issues.apache.org/jira/browse/JEXL-104
             Project: Commons JEXL
          Issue Type: Bug
    Affects Versions: 2.0.1
            Reporter: Andreas Haufler


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.


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