SAX transcoding example?

[Dwayne Schultz <dw...@schultz.net>]

I am attempting to transcode the results of an XSL translation.  With  
other systems like FOP I was able to get a ContentHandler from FOP that  
the XSL engine would send events to.  I see that TranscoderInput takes  
an XMLReader in the constructor but how to make that work with a  
ContentHandler has me confused.  Do I make my own implementation of  
XMLReader so Batik will call XMLReader.setContentHandler?  What order  
would I make my calls (ie:  construct TranscoderInput,  
Transformer.transform, PNGTranscoder.transcode)?

In an attempt to get a quick and inefficient solution I have made a  
temporary DOM document from the result of the XSL transformation.  I  
get a DOMException while transcoding so I still have no solution.  Here  
is that code:

	DOMResult domOutput = ...

	... Do xsl translation

	TranscoderInput input = new TranscoderInput(
			domOutput.getNode().getOwnerDocument());

	TranscoderOutput output = new TranscoderOutput(
			response.getOutputStream());

	ImageTranscoder transcoder = new PNGTranscoder();

	try
	{
		transcoder.transcode(input, output);
	}
	catch (TranscoderException e)
	{
		throw new Error("Unexpected TranscoderException", e);
	}

This gives me the following DOMException:

Exception in thread "main" org.w3c.dom.DOMException: The current node  
(type: 9, name: #document) do not allow children of the given type  
(type: 1, name: svg:svg)
         at org.apache.batik.dom.AbstractNode.createDOMException(Unknown  
Source)
         at org.apache.batik.dom.AbstractDocument.checkChildType(Unknown  
Source)
         at  
org.apache.batik.dom.AbstractParentNode.checkAndRemove(Unknown Source)
         at org.apache.batik.dom.AbstractParentNode.insertBefore(Unknown  
Source)
         at  
org.apache.batik.dom.util.DOMUtilities.deepCloneDocument(Unknown Source)
         at  
org.apache.batik.transcoder.SVGAbstractTranscoder.transcode(Unknown  
Source)
         at  
org.apache.batik.transcoder.image.ImageTranscoder.transcode(Unknown  
Source)
         at  
org.apache.batik.transcoder.XMLAbstractTranscoder.transcode(Unknown  
Source)
         at  
net.sf.colle.xml.BatikPlugin.finalizeResult(BatikPlugin.java:120)
         at  
net.sf.colle.xml.Transformation.transform(Transformation.java:384)
         at  
com.schield.market_indices.ThumbnailGenerator.generate(ThumbnailGenerato 
r.java:111)
         at  
com.schield.market_indices.ThumbnailGenerator.main(ThumbnailGenerator.ja 
va:57)

Any help is appreciated.  I will take an inefficient DOM solution for  
now but I would prefer a SAX solution.

Dwayne Schultz



============================

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