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From Vadim Gritsenko <va...@reverycodes.com>
Subject Re: Nesting/Aggregating generator...
Date Tue, 24 Aug 2004 18:07:45 GMT
Pier Fumagalli wrote:
> 
> I just finished writing a -some-sort-of- FileGenerator + CInclude 
> aggregator, all in one, with caching support...
> 
> My problem lies in the fact that we have some files which gets 
> transformed to generate some CInclude tags, that include content, and 
> blablabla...
> 
> Problem is that I can't cache the output of this thing, as CInclude 
> doesn't do that "nicely" (it doesn't have all the variables, as it 
> doesn't know whether its input has changed or not).
> 
> Basically what I done is that I took the two, and merged them together...
> 
> A generator always knows its input (its a file) and can verify whether 
> it's valid, if it is, then the "<include src=...>" declaration in there 
> will not be changed, so it can also verify whether its included files 
> are valid or not...
> 
> And so on recursively...
> 
> Basically, it's a <map:aggregate> but the aggregation is driven by 
> what's in the source (and recursively, in all sources so included).
> 
> Is there any interest in this? Shall I add?

How it will differ from [1]? IncludeTransformer was added recently 
exactly to address this problem with CIncludeTransformer. See also bug 
#30356.

Vadim

[1] 
http://svn.apache.org/repos/asf/cocoon/trunk/src/blocks/scratchpad/java/org/apache/cocoon/transformation/IncludeTransformer.java

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