Using Saxon Extensions from Java Applet

WilliamYou · November 5th, 2012, 01:07 PM

Hi.

I have a Java applet that populates an object with data extracted from the Applet's UI after it is entered by the User. Now using Saxon extensions I now want to pass this 'live' object to a transformer so it can use the data to generate XML. But how do I do this? i.e. set up the parser | transformer etc from Java.

I have created the transformer using oxygen XML and I can get it to work by setting the extensions to the applicable Jar file but how is the same done in plain old Java?

--
William

mhkay · November 5th, 2012, 02:30 PM

The options for invoking Saxon from a Java application are explained here:

http://www.saxonica.com/documentatio...-xsl/embedding

and further elaborated in the Javadoc.

WilliamYou · November 9th, 2012, 10:36 AM

Hello. Having finally had time to get back to this and read the documentation I am still no further forward, as I still see no way of "registering" my POJO class or providing an instance of it so I can access it within my Style Sheet.

There are methods to registerExtensionFunction available on the Processor in the s9api, but my object isn't derived from the expected type.

I know what I want to do can be done as I have a version using a different Class albeit within the Oxygen IDE, but how to actually :

Code:

processor = new Processor(false) ;
**************
processor.setExtension(my.extension.class) ;
processor.setExtensionInstance(myInstance) ;
**************
compiler = processor.newXsltCompiler() ;
executable = compiler.compile(style) ;
source = processor.newDocumentBuilder().build(streamSource) ;
output = processor.newSerializer(new File(f.toString())) ;
transformer = executable.load() ;
transformer.setInitialContextNode(source) ;
transformer.setInitialTemplate(new QName("build")) ;
transformer.setDestination(output) ;
transformer.transform() ;

So in the XSLT I can use this:

Code:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:RM="java:you.RM.Definition" exclude-result-prefixes="xs RM">
    <xsl:output method="xml" indent="yes" encoding="UTF-8" version="1.0"/>
    <xsl:template name="build">
        <xsl:variable name="Def" select="RM" />
        <xsl:element name="definition">
            <xsl:attribute name="title" select="RM:getTitle($Def)"/>
        </xsl:element>
    </xsl:template>
</xsl:stylesheet>

This is driving me to distraction so I'd really appreciate some help here.

--
William

mhkay · November 9th, 2012, 11:32 AM

I don't know where you are going wrong, because you haven't given any clues about what you are doing. So it's hard to do anything other than point you to the documentation; but I've already done that.

The first thing to be clear on (well, if you've read the documentation you already know this) is that there are two kinds of extension function mechanism, called "reflexive" extension functions and "integrated extension functions" and they are not all available in all product releases.

But if you can give a clear description of what you are doing and how it is failing, then it will be much easier to help you. And it would be better to do it on the Saxon forum at http://saxonica.plan.io.