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From "Dennis Lundberg (JIRA)" <j...@codehaus.org>
Subject [jira] Commented: (MCHANGES-97) Fix VTL errors
Date Sat, 02 Feb 2008 17:35:57 GMT

    [ http://jira.codehaus.org/browse/MCHANGES-97?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_122138
] 

Dennis Lundberg commented on MCHANGES-97:
-----------------------------------------

I am unable to reproduce this error. Could you provide a minimal project that exploits this
bug?

> Fix VTL errors
> --------------
>
>                 Key: MCHANGES-97
>                 URL: http://jira.codehaus.org/browse/MCHANGES-97
>             Project: Maven 2.x Changes Plugin
>          Issue Type: Improvement
>          Components: announcement
>    Affects Versions: 2.0-beta-3
>            Reporter: Benjamin Bentmann
>            Priority: Trivial
>         Attachments: changes.xml, vtl-errors.patch
>
>
> When calling {{mvn changes:announcement-generate}} for the attached {{changes.xml}} VTL
errors are logged due to the various null fields in the {{Action}} bean:
> {noformat}
> [INFO] [changes:announcement-generate]
> [INFO] Creating announcement file from changes.xml...
> [ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm
[line 30, column 1]
> [ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm
[line 31, column 1]
> [ERROR] Left side ($!issue) of '!=' operation has null value. Operation not possible.
org/apache/maven/plugin/announcement/announcement.vm [line 32, column 27]
> [ERROR] Left side ($!dueto) of '!=' operation has null value. Operation not possible.
org/apache/maven/plugin/announcement/announcement.vm [line 32, column 65]
> [ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm
[line 43, column 1]
> [ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm
[line 44, column 1]
> [ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm
[line 56, column 1]
> [ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm
[line 57, column 1]
> [ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm
[line 69, column 1]
> [ERROR] RHS of #set statement is null. Context will not be modified. org/apache/maven/plugin/announcement/announcement.vm
[line 70, column 1]
> [INFO] File created...
> {noformat}
> The attached patch goes the hard way and improves the VTL template to check for nulls.
Easier would be to establish an invariant for the bean properties stating that they are never
null but maybe empty, i.e. change all the setters to convert null into an empty string.

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