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Posted to dev@velocity.apache.org by "Will Glass-Husain (JIRA)" <de...@velocity.apache.org> on 2009/11/03 03:07:59 UTC

[jira] Commented: (VELOCITY-717) Engine throws an NPE using custom macro libs if the IncludeEventHandler returns null

    [ https://issues.apache.org/jira/browse/VELOCITY-717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12772828#action_12772828 ] 

Will Glass-Husain commented on VELOCITY-717:
--------------------------------------------

Hi,

I tried to replicate this issue and couldn't. I tried merging in a macro library with Template.merge() as you suggest.  I also tried doing #parse in the included file and referencing the macro in the parent file.  Neither generated an NPE.

Can you please provide more details, ideally the VM and macro files you are using, and a code sample showing how you include the macros and merge the code.

> Engine throws an NPE using custom macro libs if the IncludeEventHandler returns null
> ------------------------------------------------------------------------------------
>
>                 Key: VELOCITY-717
>                 URL: https://issues.apache.org/jira/browse/VELOCITY-717
>             Project: Velocity
>          Issue Type: Bug
>          Components: Engine
>    Affects Versions: 1.6.2
>         Environment: Suse Linux
>            Reporter: Johann Weber
>            Priority: Critical
>             Fix For: 1.7
>
>
> The Engine throws an NPE if the IncludeEventHandler returns null.
> (using merge method with a list of macro libs)
>  java.lang.NullPointerException
> >>        at java.util.Hashtable.get(Hashtable.java:333)
> >>        at org.apache.velocity.runtime.VelocimacroManager.getNamespace(VelocimacroManager.java:318)
> >>        at org.apache.velocity.runtime.VelocimacroManager.get(VelocimacroManager.java:215)
> >>        at org.apache.velocity.runtime.VelocimacroFactory.getVelocimacro(VelocimacroFactory.java:563)
> >>        at org.apache.velocity.runtime.RuntimeInstance.getVelocimacro(RuntimeInstance.java:1563)
> >>        at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:218)
> >>        at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:175)
> >>        at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:336)
> >>        at org.apache.velocity.runtime.directive.Parse.render(Parse.java:260)
> >>        at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:175)
> >>        at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:336)
> >>        at org.apache.velocity.Template.merge(Template.java:328)

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