From: Wes Gamble <weyus@...>
Date: 2007-01-24T07:32:38+09:00
Subject: Re: Xalan with Ruby (either command line or via Jrb)?

Wes Gamble wrote:
> Does anyone have any experience will using Xalan from a Ruby program
> (Rails app. especially useful)?
> 
> I'm willing to entertain running command lines but would like to use Jrb
> (I've already got that working).
> 
> I'd consider JRuby but feel like that might be too heavyweight.
> 
> Any advice/feedback would be appreciated.
> 
> Thanks,
> Wes

I seem to have gotten this working - a basic Xalan XSL transform from 
one file to another.  The do_XSL_transform takes the input file name, 
output file name, and XSL stylesheet file name as parameters.

Wes

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

require 'rjb'

require_gem 'rjb', '>= 1.0.2'

module XalanSupport
  def XalanSupport.load_Xalan_libraries
    ['serializer.jar', 'xml-apis.jar', 'xercesImpl.jar', 
'xalan.jar'].each do |lib_name|
      Rjb::load("#{RAILS_ROOT}/lib/#{lib_name}", ['-Xmx512M'])
    end
  end

  def XalanSupport.do_XSL_transform(infile, outfile, xsl)
    #Load all of the Jars
    XalanSupport.load_Xalan_libraries

    #Load all the classes
    stream_source_class = 
Rjb::import('javax.xml.transform.stream.StreamSource')
    stream_result_class = 
Rjb::import('javax.xml.transform.stream.StreamResult')
    file_output_stream_class = Rjb::import('java.io.FileOutputStream')
    transformer_factory_class = 
Rjb::import('javax.xml.transform.TransformerFactory')

    #Create the XSL transformer
    transformer_factory = transformer_factory_class.newInstance
    transformer = 
transformer_factory.newTransformer(stream_source_class.new(xsl))

    #Set up the input and output
    source = stream_source_class.new(infile)
    result = 
stream_result_class.new(file_output_stream_class.new(outfile))

    transformer.transform(source, result)
  end
end

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