[JEXL-42] NullPointerException evaluating an expression

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1
• Fix Version/s: 2.0
• Assignee: Unassigned
• Reporter: Alejandro Torras
• Created: 18/Dec/07 00:57
• Updated: 09/Mar/10 15:15
• Resolved: 17/Jul/09 17:59

Description

Hi all,

Testing randomly to find a way to have nested evaluations I got an error with the following code:

<j:set var="ax" value="ok" />
${ax+(bx)}

And the error:

Dec 18, 2007 1:55:52 AM org.apache.commons.jelly.expression.jexl.JexlExpression evaluate
WARNING: Caught exception evaluating: ax+(bx). Reason: java.lang.NullPointerException
java.lang.NullPointerException
at org.apache.commons.jexl.parser.ASTAddNode.value(ASTAddNode.java:116)
at org.apache.commons.jexl.parser.ASTExpression.value(ASTExpression.java:53)
at org.apache.commons.jexl.parser.ASTExpressionExpression.value(ASTExpressionExpression.java:55)
at org.apache.commons.jexl.ExpressionImpl.evaluate(ExpressionImpl.java:79)
at org.apache.commons.jelly.expression.jexl.JexlExpression.evaluate(JexlExpression.java:69)
at org.apache.commons.jelly.impl.ExpressionScript.run(ExpressionScript.java:66)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:186)
at org.apache.commons.jelly.tags.core.JellyTag.doTag(JellyTag.java:45)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:247)
at org.apache.commons.jelly.util.CommandLineParser.invokeCommandLineJelly(CommandLineParser.java:130)
at org.apache.commons.jelly.Jelly.main(Jelly.java:92)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.werken.forehead.Forehead.run(Forehead.java:551)
at com.werken.forehead.Forehead.main(Forehead.java:581)

Obviously "bx" is not defined.

Regards,
Alejandro Torras.