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Posted to dev@velocity.apache.org by "Henning Schmiedehausen (JIRA)" <de...@velocity.apache.org> on 2007/03/08 01:04:40 UTC

[jira] Closed: (VELOCITY-374) VE throws NPE if not initialized

     [ https://issues.apache.org/jira/browse/VELOCITY-374?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Henning Schmiedehausen closed VELOCITY-374.
-------------------------------------------


> VE throws NPE if not initialized
> --------------------------------
>
>                 Key: VELOCITY-374
>                 URL: https://issues.apache.org/jira/browse/VELOCITY-374
>             Project: Velocity
>          Issue Type: Bug
>          Components: Engine
>    Affects Versions: 1.5
>         Environment: Operating System: other
> Platform: Other
>            Reporter: Will Glass-Husain
>             Fix For: 1.5
>
>
> VelocityEngine throws a strange NPE if it's not initialized.  It'd be better 
> if it threw an Exception with a meaningful error message.
> From jeichels@optonline.net <je...@optonline.net>
> I had another problem that I think can help others in the future.  In looking 
> through the archives I noticed other people having the same null pointer 
> exception I was having.  I went through the code and noticed that if a person 
> did not "init()" a velocity engine, the resourceManager never gets 
> initialized.  When they call the function below in RuntimeInstance.java, they 
> get the null pointer exception.
>     public Template getTemplate(String name, String  encoding)
>         throws ResourceNotFoundException, ParseErrorException, Exception
>     {
>         return (Template)
>                 resourceManager.getResource(name,
>                     ResourceManager.RESOURCE_TEMPLATE, encoding);
>     }
> ERROR [http8080-Processor2] TemplateToStringManagerBD.getContentAsString() - 
> VelocityEngine failed to merge the template.
> java.lang.NullPointerException
>         at org.apache.velocity.runtime.RuntimeInstance.getTemplate
> (RuntimeInstance.java:835)
>         at org.apache.velocity.runtime.RuntimeInstance.getTemplate
> (RuntimeInstance.java:817)
>         at org.apache.velocity.runtime.RuntimeSingleton.getTemplate
> (RuntimeSingleton.java:285)
>         at org.apache.velocity.app.Velocity.getTemplate(Velocity.java:469)
>         at 
> com.jb.commonmvc.view.template.velocity.TemplateToStringManagerBD.getContentAsS
> tring(TemplateToStringManagerBD.java:120)
>         at com.jb.commonmvc.transport.email.EmailTemplate.emailTemplate
> (EmailTemplate.java:37)

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