Difficulty converting Stylesheet Class to XML String 2005-10-04 - By Brian Frutchey
I am attempting to build a quick JNI bridge between Xalan-J and Xalan-C++ such
that a single-threaded windows application won't take so long to transform
large mime messages with embedded base-64 encoded content (even with XSLTC a
12MB file takes 3 minutes and 85MB RAM to transform in Xalan-J, Xalan-C++
knocks it out in less than a second). I am looking to pass the xml source,
xslt, and result across the JNI interface as strings. However, I can't
understand how to get the org.apache.xalan.templates.Stylesheet class used by
the TransformerFactoryImpl to build an XML string from its contents. I built
my own ContentHandler instead of using the org.apache.xalan.processor
.StylesheetHandler, and I can simply build the XML String from the SAX events
(which then works with my JNI interface), however I have difficulty supporting
namespaces and am fairly certain I will never implement the w3c requirements in
full, so it is not very good for general-use. Hence I am wanting to override
the existing xalan classes. The only problem I seem to have is getting the
Stylesheet out of the class as a string. I tried treating the stylesheet as a
node tree and walking it, but can't seem to find the root node (getParent() is
always null). Any ideas? Thanks.
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<P><FONT SIZE=2 FACE="Arial">I am attempting to build a quick JNI bridge
between Xalan-J and Xalan-C++ such that a single-threaded windows application
won't take so long to transform large mime messages with embedded base-64
encoded content (even with XSLTC a 12MB file takes 3 minutes and 85MB RAM to
transform in Xalan-J, Xalan-C++ knocks it out in less than a second). I
am looking to pass the xml source, xslt, and result across the JNI interface as
strings. However, I can't understand how to get the org.apache.xalan
.templates.Stylesheet class used by the TransformerFactoryImpl to build an XML
string from its contents. I built my own ContentHandler instead of using
the org.apache.xalan.processor.StylesheetHandler, and I can simply build the
XML String from the SAX events (which then works with my JNI interface),
however I have difficulty supporting namespaces and am fairly certain I will
never implement the w3c requirements in full, so it is not very good for
general-use. Hence I am wanting to override the existing xalan classes.
The only problem I seem to have is getting the Stylesheet out of the
class as a string. I tried treating the stylesheet as a node tree and
walking it, but can't seem to find the root node (getParent() is always null).
Any ideas? Thanks.</FONT></P>
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