Nesting Velocity tags

["Ford, Peter" <Pe...@travelocity.com>]

Question: Can Velocity recursively process tags found inside values returned from the context?

Here's a simplified example of what I'm talking about. My template may contain something like:

===
My name is ${name}.
===

In the context I have these key/value pairs:

first=Fred
last=Bloggs
name=${first} ${last}

When I process the template against that context, I would like to see:

===
My name is Fred Bloggs.
===

...but my initial tests give me:

===
My name is ${first} ${last}.
===

Possibly I'm doing something wrong, possibly there's a very simple way to make it do what I need and I'm just not seeing it. Unfortunately this isn't a hypothetical situation - this is something I have to get working, and I'm running out of time. If anyone knows the answer I'd appreciate it.

Thanks,
Pete

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Re: Nesting Velocity tags

[Nathan Bubna <na...@esha.com>]

Ford, Peter said:
...
> Here's a simplified example of what I'm talking about.
> My template may contain something like:
>
> ===
> My name is ${name}.
> ===
>
> In the context I have these key/value pairs:
>
> first=Fred
> last=Bloggs
> name=${first} ${last}
>
> When I process the template against that context, I would like to see:
>
> ===
> My name is Fred Bloggs.

you can't do this without a tool.
this is one that should help:
http://jakarta.apache.org/velocity/tools/javadoc/org/apache/velocity/tools/generic/RenderTool.html

Nathan Bubna
nathan@esha.com


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RE: Nesting Velocity tags

[Tim Colson <tc...@cisco.com>]

Peter -
 First off, there does not appear to be any nesting in your example, just
simple output of variables.

And since you are getting $first instead of "Fred" -- it is probably as
simple as the context does not really have that variable in it. 

Try:
#set ($first = "Peter") 
FIRST=$first

And show us how you are populating the context -- so we can try to help.

Cheers,
Tim

> > first=Fred
> > last=Bloggs
> > name=${first} ${last}
> > 
> > When I process the template against that context, I would 
> like to see:
> > ..but my initial tests give me:
> > 
> > ===
> > My name is ${first} ${last}.


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Re: Nesting Velocity tags

[T E Schmitz <ma...@numerixtechnology.de>]

Hi Pete,
I sympathize - I was battling against exactly this for days but I didn't 
dare ask a "daft" question! (I am just amending Torque's Velocity 
templates, so I am not a seasoned Velocity programmer :-( ).

Try putting the compound variable in quotation marks and make sure both 
variables are actually set:
name="${first} ${last}"

Regards,

Tarlika Elisabeth Schmitz


Ford, Peter wrote:

> first=Fred
> last=Bloggs
> name=${first} ${last}
> 
> When I process the template against that context, I would like to see:
> 
> ===
> My name is Fred Bloggs.
> ===
> 
> ..but my initial tests give me:
> 
> ===
> My name is ${first} ${last}.
> ===
> 


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RE: Nesting Velocity tags

[Tim Colson <tc...@cisco.com>]

Doh!
Apologies... That will teach me to read the reply before the original
question! Oops! :-)

To answer your question, which involves double parsing -- No. <grin>

Cheers,
Tim

> ===
> My name is ${name}.
> ===
> 
> In the context I have these key/value pairs:
> 
> first=Fred
> last=Bloggs
> name=${first} ${last}
> 
> When I process the template against that context, I would like to see:
> 
> ===
> My name is Fred Bloggs.
> ===
> 
> ...but my initial tests give me:
> 
> ===
> My name is ${first} ${last}.
> ===
> 
> Possibly I'm doing something wrong, possibly there's a very 
> simple way to make it do what I need and I'm just not seeing 
> it. Unfortunately this isn't a hypothetical situation - this 
> is something I have to get working, and I'm running out of 
> time. If anyone knows the answer I'd appreciate it.
> 
> Thanks,
> Pete
> 
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> To unsubscribe, e-mail: velocity-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: velocity-user-help@jakarta.apache.org
> 
> 


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