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https://issues.apache.org/jira/browse/VELOCITY-102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12623023#action_12623023
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Nathan Bubna commented on VELOCITY-102:
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java.lang.Math seems like a good enough general example. At least, everyone
knows it and its static nature, so the problem is apparent. Though i'm not
entirely sure how Adrian intends to do this, I don't think this is likely to
take more code than something along the lines of Jim Seach's tweak to
UberspectImpl.getMethod above (just fixed to maintain backwards compatibility).
Seems like a pretty small code effort (new docs and tests aside) for a
feature that appears sufficiently desired by people. As long as someone who
wants it does the work, i have no problem with the basic idea. I only object
to the "automatic names" idea, as that does open up new complications and
implies a change to Context (a very public interface).
> Add Support for Static Utility Classes
> --------------------------------------
>
> Key: VELOCITY-102
> URL: https://issues.apache.org/jira/browse/VELOCITY-102
> Project: Velocity
> Issue Type: Improvement
> Components: Engine
> Affects Versions: 1.3-rc1
> Environment: Operating System: All
> Platform: All
> Reporter: Juozas Baliuka
> Priority: Minor
> Fix For: 1.6
>
>
> Support for Static Utility Classes is:
> 1) define namespaces
>
> context.defineNamespace("Math").add( java.lang.Math.class ) ;
> used as $Math.sin(0)
> 2) Add / Replace / remove methods in namespace :
>
> context.getNamespace("Math").add(MyRandom.class.getMethod("randomString",new
> Class[]{int.class}))
> used as $Math.randomString(12)
> 3) "union" on namespaces
> context.defineNamespace("Utils")
> .add(context.getNamespace("Math"))
> .add(context.defineNamespace("Collections",Collections.class ) );
> used as:
> $Utils.sin(0)
> $Utils.sort($list)
> 4) Global namespace
> context.getGlobalNamespace().add( Math.class );
> used as $sin(0)
> 5) inline namespaces:
> #use java.lang.Math as Math
> $Math.sin(0)
> #end
> #with Math
> $sin(0)
> #end
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