PLATFORM_IS_JAVA=!(RUBY_PLATFORM.index('java').nil?)
OS_IS_WINDOWS=!(ENV['OS'].nil? ? true : ENV['OS'].index('Windows').nil?)


if OS_IS_WINDOWS
	module Mtk_xslt
	  class XsltProcessor
	    def name
		return "msxml"
	    end
	    def transform(xslt,infile,outfile)
		    param="#{infile} -o #{outfile} #{xslt}"
		    cmd="#{File.dirname(__FILE__)}\\converter-ea\\msxsl.exe "+param.tr('/','\\\\')
		    ret=system(cmd)
		    raise Exception.new("\n***\n***Error running command\n***\n***#{cmd}\n***Please check that no msxml process is running in background\n***\n") unless ret
	    end
	  end # XsltProcessor
	end 
elsif PLATFORM_IS_JAVA
	# Jruby version

	#from:
	#  http://kfahlgren.com/blog/2007/03/02/borrowing-javas-xslt-support-for-ruby/

	require 'java'
	module Mtk_xslt
	  include_class "javax.xml.transform.TransformerFactory"
	  include_class "javax.xml.transform.Transformer"
	  include_class "javax.xml.transform.stream.StreamSource"
	  include_class "javax.xml.transform.stream.StreamResult"
	  include_class "java.lang.System"


	  class Saxon 
	    def transform(xslt,infile,outfile)
	      transformer = @tf.newTransformer(StreamSource.new(xslt))
	      transformer.transform(StreamSource.new(infile), StreamResult.new(outfile))
	    end
	    def name
		return "jruby/saxon"
	    end
	    TRANSFORMER_FACTORY_IMPL = "net.sf.saxon.TransformerFactoryImpl"
	    def initialize
	      System.setProperty("javax.xml.transform.TransformerFactory", TRANSFORMER_FACTORY_IMPL)
	      @tf = TransformerFactory.newInstance
	      raise Exception.new("\n*** *******\n*** ERROR loading saxon into jruby.\n*** This error may be caused by missing Saxon jars in jruby lib directory\n*** *******") if @tf.nil?
	    end
	  end
	  class Xalan 
	    def transform(xslt,infile,outfile)
	      transformer = @tf.newTransformer(StreamSource.new(xslt))
	      transformer.transform(StreamSource.new(infile), StreamResult.new(outfile))
	    end
	    def name
		return "jruby/xalanl"
	    end
	    TRANSFORMER_FACTORY_IMPL = "org.apache.xalan.processor.TransformerFactoryImpl"
	    def initialize
	      System.setProperty("javax.xml.transform.TransformerFactory", TRANSFORMER_FACTORY_IMPL)
	      @tf = TransformerFactory.newInstance
	      raise Exception.new("\n*** *******\n*** ERROR loading saxon into jruby.\n*** This error may be caused by missing xalan jars in jruby lib directory\n*** *******") if @tf.nil?
	    end
	  end
	  #class XsltProcessor < Saxon ; end
	  class XsltProcessor < Xalan ; end
	end 

	# if you wanted to run this from the command line, do something like
	# $ jruby lib/jxslt.rb a.xsl in.xml out.xml
	#xalan = Mtk_xslt::XsltProcessor.new
	#xalan.transform(*ARGV)
	#saxon = JXslt::Saxon.new
	#saxon.transform(*ARGV)

else
	# XSLT is not available
	module Mtk_xslt
	  class XsltProcessor
		  def initialize
		    raise Exception.new("\n***\n***XSLT is not available on your platform. Currently supported platform are JRUBY and Windows\n***\n***") 
		  end
	  end
	end
end