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From Nathan Bubna <nbu...@gmail.com>
Subject Re: Creating objects in template using "new" keyword
Date Thu, 03 Mar 2005 15:44:51 GMT
On Wed, 2 Mar 2005 22:33:47 -0800, Shinobu Kawai
<shinobu.kawai@gmail.com> wrote:
> Hi Ravikanth,
> 
> > I would like to create a object reference in template using "new"
> > keyword like what we do in java
> >
> > String obj = new String()

<cringe>not a best practice!</cringe> :)

> > I need to put RenderTool instance in context and use it to fix some
> > problem. I know that i can put it to context from the java code where
> > the template is being called or using toolbox.xml  But as my
> > application is standalone and in production and i don't want to change
> > the java code to fix the issue, i want to handle it in template.
> 
> If you really, really, really want to do it, check out the deprecated
> ToolLoader.
>   http://jakarta.apache.org/velocity/tools/javadoc/org/apache/velocity/tools/generic/ToolLoader.html

but this is gone in VelocityTools 1.2

> Or, you can call Class#newInstance from anywhere.
> See Will's HackingVelocity power point about how to do this.
>   http://wiki.apache.org/jakarta-velocity/HackingVelocity
> ## Under "An Evil Velocity Template"

if you have to do this, i recommend this way.  just to make sure it's
clear that it's not a good thing to be doing. ;-)

> > And also is there any way to get the reference to the context in
> > templates when Velocity.mergeTemplate() is being used, though the
> > context reference is not kept in context.
> 
> None that I know of.
> 
> > Is it possible to achieve this ? Any suggestions are most welcome.
> 
> What would be the risks of adding the two lines to your java code?  If
> none of the templates already use the references "$render" or "$ctx",
> then I think you can update it without much worry.
> 
> I also think there was a post in bugzilla some while ago about a
> toolbox for standalone apps.
> 
> Best regards,
> -- Shinobu
> 
> --
> Shinobu Kawai <shinobu.kawai@gmail.com>
> 
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