Locationmap API and java

[Thorsten Scherler <th...@apache.org>]

Hi devs,

I 'promoted' the locationmap over in lenya and some questions caught me
red handed:

> > <map:read src="{lm:resources/shared/css/{3}.css}"
> 
> How would that be used from Java classes?
> 
> Like I would use sourceResolver.resolveURI("fallback://..."),
> is there a Java API for LocationMaps, or is it accessible as an
> InputModule only?

Maybe somebody can help me out here. I am still only looking at the
classes and not into them. ;-)

...and 
> Another point: How would loops be implemented?
> You have a chain of parents. Is it possible to use recursion?

Would be nice if somebody can explain it to us that I and Andreas can
understand it better.

BTW the thread starts here
http://mail-archives.apache.org/mod_mbox/lenya-dev/200507.mbox/%
3c42D1943F.5060402@wyona.com%3e

and the questions raises here:
http://mail-archives.apache.org/mod_mbox/lenya-dev/200507.mbox/%
3c42D68DB5.1030300@apache.org%3e

TIA
-- 
thorsten

"Together we stand, divided we fall!" 
Hey you (Pink Floyd)

Re: Locationmap API and java

[Unico Hommes <un...@apache.org>]

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Hi Thorsten,

Thorsten Scherler wrote:
> Hi devs,
> 
> I 'promoted' the locationmap over in lenya and some questions caught me
> red handed:
> 
> 
>>><map:read src="{lm:resources/shared/css/{3}.css}"
>>
>>How would that be used from Java classes?
>>
>>Like I would use sourceResolver.resolveURI("fallback://..."),
>>is there a Java API for LocationMaps, or is it accessible as an
>>InputModule only?

No LocationMap API no, the functionality is only available as an
InputModule, wich is in fact an API itself so should be no problem there.


InputModule lmm = (InputModule) m_manager.lookup(InputModule.ROLE +
"/locationmap");

String location = lmm.getVariable(moduleString, null, objectModel);

> 
> 
> Maybe somebody can help me out here. I am still only looking at the
> classes and not into them. ;-)
> 
> ...and 
> 
>>Another point: How would loops be implemented?
>>You have a chain of parents. Is it possible to use recursion?

If you implement a locationmap source protocol you get recursion for
free. Continuing with the example code above:

Source s = sourceResolver.resolveURI(location);

s of course could be a LocationMapSource itself.


- --
Unico
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Re: Locationmap API and java

[Ross Gardler <rg...@apache.org>]

Thorsten Scherler wrote:
> Hi devs,
> 
> I 'promoted' the locationmap over in lenya and some questions caught me
> red handed:
> 
> 
>>><map:read src="{lm:resources/shared/css/{3}.css}"
>>
>>How would that be used from Java classes?
>>
>>Like I would use sourceResolver.resolveURI("fallback://..."),
>>is there a Java API for LocationMaps, or is it accessible as an
>>InputModule only?
> 
> 
> Maybe somebody can help me out here. I am still only looking at the
> classes and not into them. ;-)

I'm a little deeper into the classes but I'm not swimming freely yet. My 
hint to you is search for methods called "locate".

> ...and 
> 
>>Another point: How would loops be implemented?
>>You have a chain of parents. Is it possible to use recursion?
> 
> 
> Would be nice if somebody can explain it to us that I and Andreas can
> understand it better.

I've read the whole thread, but I'm missing too much context to 
understand the use case. Why would one want recursion?

Ross