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Subject: RE: Custom Transformer
Date: Thu, 1 Mar 2007 08:37:29 -0600
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Thread-Topic: Custom Transformer
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From: "Schmitz, Jeffrey A" <Jeffrey.A.Schmitz@boeing.com>
To: <users@cocoon.apache.org>

OK (you asked for it), basically I have some xml that needs to be =
massaged first by a simple xslt before being fed into my transformer, =
and then once my transformer is done, I need to result to be massaged =
again with another xslt.

My transformer relies on some predefined and specific transformer =
libraries that I have no control over, so the xml has to be massaged to =
fit into the format required by these libraries.  If I can just build a =
string with the incoming xml (from the first xslt), I can then feed this =
string of xml into the custom transform libraries (as long as the xml =
contained in the string is structured correctly). So basically, here is =
what I need my custom tranformer to do:

1. Accept SAX events and build a string of the incoming xml
2. Perform transform on the received xml string
3. Output the resulting xml in the form of more Sax events for the next =
tranformer/serializer in line.  i.e. something like this:

      String message =3D doMyCustomTransform(incomingXMLString);
     =20
      //Create a reader for turning a string into an InputSource
      XMLReader xmlreader =3D XMLReaderFactory.createXMLReader();

      //Set the content handler into the XMLReader class.
      xmlreader.setContentHandler(contentHandler);

      //Now feed the source into the xml reader, which will turn around =
and
      //invoke the proper handlers in the contentHandler based on the
      //string.=20
      InputSource source =3D new InputSource(new StringReader(message));
      xmlreader.parse(source);


I've pretty much got steps 2 and 3 worked out.  I just need the step 1 =
part.

Need anymore details?

Thanks,
Jeff=20

-----Original Message-----
From: Grzegorz Kossakowski [mailto:grek@tuffmail.com]=20
Sent: Thursday, March 01, 2007 8:29 AM
To: users@cocoon.apache.org
Subject: Re: Custom Transformer

Schmitz, Jeffrey A napisa=B3(a):
>  Is there a simple implementation of a Custom Transformer using=20
> AbstractSAXTransformer anywhere?  Would love to see just a Hello World =

> program, but can't seem to find one.
>  =20
The most simple transformer I can think of is =
StripNamespacesTransformer[1].

It would be much better if you could come up with some details of your =
own transformer you want to write so we could give you some clues.

[1]
https://svn.apache.org/viewvc/cocoon/branches/BRANCH_2_1_X/src/java/org/a=
pache/cocoon/transformation/StripNameSpacesTransformer.java?view=3Dmarkup=


--
Grzegorz Kossakowski

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