java - Choose XSLT processor depending on XSLT version -

my application has many old stylesheets written in xslt 1.0 , new ones being written in xslt 2.0.

with saxon 9.6 many of old stylesheets not functioning properly, ones using exslt set:distinct. hence, want continue using xalan transform old xslt 1.0 stylesheets, use saxon new xslt 2.0 stylesheets.

in java best way read xsl:stylesheet/@version attribute of xsl file before deciding on transformerfactory?

as of now, application creates streamsource absolute path of xsl file.

source xslsource = new streamsource(xslfilepath); string version = ...; // todo xslt version of xsl file  transformerfactory transformerfactory;  if ("2.0".equals(version)) {     transformerfactory = new net.sf.saxon.transformerfactoryimpl(); } else {     transformerfactory = new org.apache.xalan.processor.transformerfactoryimpl(); } 

that's way any. note if write sax contentreader access xsl:stylesheet/@version, can abort parsing version known throwing saxexception.