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https://issues.apache.org/jira/browse/JEXL-104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andreas Haufler updated JEXL-104:
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Attachment: JexlArithmeticBug.java
FixedJexlArithmetic.java
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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