Re: Writing a custom transformer

[Vadim Gritsenko]

simo kauranen wrote:

>Now I've written and compiled a transformer. I put the
>.class file where I found the other transformer .class
>files (not under tomcat) and defined the transformer
>in the sitemap (and restarted tomcat). I got
>ClassNotFoundException. 
>
>Could someone tell where I should put the .class file
>that cocoon would find it?
>

tomcat/webapps/cocoon/WEB-INF/classes/my/package/MyTransformer.class

Vadim


>Simo K.
>  
>




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RE: Writing a custom transformer

[simo kauranen]

Now I've written and compiled a transformer. I put the
.class file where I found the other transformer .class
files (not under tomcat) and defined the transformer
in the sitemap (and restarted tomcat). I got
ClassNotFoundException. 

Could someone tell where I should put the .class file
that cocoon would find it?

Simo K.

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RE: Writing a custom transformer

[Piroumian Konstantin]

> From: simo kauranen [mailto:[EMAIL PROTECTED]] 
> 
> Hi,
> 
> Maybe I'm a little dumb but I can't figure out from
> the source codes how I should write my own
> transformer. Several questions remain:
> 
> Which functions should a transformer implement?

Transformer is an implementation of a SAX ContentHandler and inherits all
the methods like: startDocument(), startElement(), ..., endElement(),
endDocument(). (For the complete list see SAX2 specification or the
AbstractSAXTrasnformer).

You decide depending on the task you want to solve with your transformer
which ones to override to get the needed result.

The rest of the methods that usually are present, like: configure(),
setup(), recycle(), dispose() are lifecycle interfaces implementations from
Avalon. See http://jakarta.apache.org/avalon for details.

Konstantin

> 
> Which function takes in the SAX stream and which emits
> it forward and how? 
> 
> Where the changes to the SAX are made? I went through
> among others the TraxTransformer source code but I
> couldn't find the line where the xslt transformation
> was made?
> 
> Are loggers necessary for a transformer?
> 
> Could someone help with these? Thanks!
> 
> 
> Simo K.
> 
> 
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Writing a custom transformer

[simo kauranen]

Hi,

Maybe I'm a little dumb but I can't figure out from
the source codes how I should write my own
transformer. Several questions remain:

Which functions should a transformer implement?

Which function takes in the SAX stream and which emits
it forward and how? 

Where the changes to the SAX are made? I went through
among others the TraxTransformer source code but I
couldn't find the line where the xslt transformation
was made?

Are loggers necessary for a transformer?

Could someone help with these? Thanks!


Simo K.


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RE: Writing a custom Transformer?

[Piroumian Konstantin]

> From: simo kauranen [mailto:[EMAIL PROTECTED]] 
> 
> Hi,
> 
> Does anyone happen to know where I could find a simple
> and thorough example of writing a custom transformer.
> I've searched all over the net but haven't found
> anything detailed enough.

Take a look at the Cocoon transformers' source:
org.apache.cocoon.transformation.*;
Not that they are all simple, but you'll get the idea.

Konstantin

> 
> Thanks for tips!
> 
> Simo K.
> 
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Writing a custom Transformer?

[simo kauranen]

Hi,

Does anyone happen to know where I could find a simple
and thorough example of writing a custom transformer.
I've searched all over the net but haven't found
anything detailed enough.

Thanks for tips!

Simo K.

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