For-each in sitemap?

[Sjur Moshagen <sj...@mac.com>]

Hello,

I would like to aggregate a dynamic list of documents following a  
certain pattern, but I can't find a way of doing it. I have been  
searching the user docs and the mailing lists, to no avail.

Here's what I would like to do, in some rough pseudo-code:

match on request parameter
   aggregate:
     for-each {value} in the {request parameter}
       cocoon:{value}/file
     end for-each
   end aggregate
   transform
   serialise

The request parameter would come from a multiple-selection list.

Is something like this possible? If so, how?

Background/use case:

I have an XML db (eXist) with collections of xml documents I need to  
query. Each collection contains different types of xml documents, and  
the query and subsequent processing needs to be tailored to each  
collection. As not all collections are public/searchable, or the user  
can specify a subset of them, I can't know in advance which  
collections I'm going to search, and subsequently aggregate the  
results from. Thus the need to aggregate based on a dynamic list.

Any help greatly appreciated.

Best regards,
Sjur


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Re: For-each in sitemap?

[Sjur Moshagen <sj...@mac.com>]

Hello Jeroen,

Thanks for your help. As I understand your suggestion, the idea is to  
generate a document with the (C)Include elements required, and then  
include the dynamically created list of documents with an include  
transformation. I assume I can replace the JX-template with something  
else that can dynamically create the Include document. This sounds  
excellent.

My remaining question regarding this solution is whether the included  
documents will be read as is from the db/file system, or whether I  
can specify the "cocoon:" protocol in the src attribute in the  
include statements, to have the requests processed by the sitemap (I  
need the sitemap processing of each include for my application  
logic)? I could use the external/extended version of the Include  
statements, specifying the server and all, but that requires me to  
either dynamically generate the correct server address, or change it  
manually whenever I move the application from the development  
computer to the deployment server. Not a big thing, but it would  
definitely be nicer to just use the cocoon: protocoll:-)

Thanks again!

Best regards,
Sjur

Den 12. jun. 2006 kl. 17.06 skrev Jeroen Reijn:

> Hi Sjur,
>
> I do not know of any solution in the sitemap, but you are able to  
> do this:
>
> It should be something like this in pseudo-code:
>
> <map:generate src="request.xml" type="jx/>
> <map:transform type="include"/>
> <map:serialize type="xml"/>
>
> Step1. JX template generator
>
> The generator generates a JX-template. The JX-template has the  
> cocoon.request object available to iterate through.
> You can create <include src="file"/> elements for the include  
> transformer.
>
> Step2. (C)Include transformer
>
> The (C)Include transformer will fetch your documents from your DB.
>
>
> For more information about both components please take a look at:
>
> http://cocoon.apache.org/2.1/userdocs/flow/jxtemplate.html
>
> and
>
> http://cocoon.apache.org/2.1/userdocs/cinclude-transformer.html
>
> I hope this will help you out.
>
> Regards,
>
> Reijn


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Re: For-each in sitemap?

[Jeroen Reijn <j....@hippo.nl>]

Hi Sjur,

I do not know of any solution in the sitemap, but you are able to do this:

It should be something like this in pseudo-code:

<map:generate src="request.xml" type="jx/>
<map:transform type="include"/>
<map:serialize type="xml"/>

Step1. JX template generator

The generator generates a JX-template. The JX-template has the cocoon.request object available to iterate through.
You can create <include src="file"/> elements for the include transformer.

Step2. (C)Include transformer

The (C)Include transformer will fetch your documents from your DB.


For more information about both components please take a look at:

http://cocoon.apache.org/2.1/userdocs/flow/jxtemplate.html

and

http://cocoon.apache.org/2.1/userdocs/cinclude-transformer.html

I hope this will help you out.

Regards,

Reijn


Sjur Moshagen wrote:
> Hello,
> 
> I would like to aggregate a dynamic list of documents following a 
> certain pattern, but I can't find a way of doing it. I have been 
> searching the user docs and the mailing lists, to no avail.
> 
> Here's what I would like to do, in some rough pseudo-code:
> 
> match on request parameter
>   aggregate:
>     for-each {value} in the {request parameter}
>       cocoon:{value}/file
>     end for-each
>   end aggregate
>   transform
>   serialise
> 
> The request parameter would come from a multiple-selection list.
> 
> Is something like this possible? If so, how?
> 
> Background/use case:
> 
> I have an XML db (eXist) with collections of xml documents I need to 
> query. Each collection contains different types of xml documents, and 
> the query and subsequent processing needs to be tailored to each 
> collection. As not all collections are public/searchable, or the user 
> can specify a subset of them, I can't know in advance which collections 
> I'm going to search, and subsequently aggregate the results from. Thus 
> the need to aggregate based on a dynamic list.
> 
> Any help greatly appreciated.
> 
> Best regards,
> Sjur
> 
> 
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> To unsubscribe, e-mail: users-unsubscribe@cocoon.apache.org
> For additional commands, e-mail: users-help@cocoon.apache.org
> 

-- 
Met vriendelijke groet,
Kind regards,

Jeroen Reijn

Hippo

Oosteinde 11
1017WT Amsterdam
The Netherlands
Tel  +31 (0)20 5224466


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