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https://issues.apache.org/jira/browse/JEXL-104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12897201#action_12897201
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Andreas Haufler edited comment on JEXL-104 at 8/11/10 6:08 AM:
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The first file (JexlArithmeticBug.java) shows the bug. The second file
(FixedJexlArithmetic.java) is a suggested fix, BUT it is just a give re-write
of the original code. I'm not too deep into reflection with arrays and all that
so the original author might want to take a look at it and might apply a better
fix.
was (Author: [email protected]):
First file shows the bug. The second file is a suggested fix, BUT it is
just a give re-write of the original code. I'm not too deep into reflection
with arrays and all that so the original author might want to take a look at it
and might apply a better fix.
> NPE in JexlArithmetic when an Array-Expression containing a null is used.
> -------------------------------------------------------------------------
>
> 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
> Attachments: FixedJexlArithmetic.java, JexlArithmeticBug.java
>
>
> 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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