Locating Transformers

• The javax.xml.transform.TransformerFactory Java system property determines which XSLT engine TrAX uses.

• Its value is the fully qualified name of the implementation of the abstract javax.xml.transform.TransformerFactory class. Possible values of this property include:

  • Saxon 6.x: com.icl.saxon.TransformerFactoryImpl

  • Saxon 7.x: net.sf.saxon.TransformerFactoryImpl

  • Xalan: org.apache.xalan.processor.TransformerFactoryImpl

  • jd.xslt: jd.xml.xslt.trax.TransformerFactoryImpl

  • Oracle: oracle.xml.jaxp.JXSAXTransformerFactory

• This property can be set in all the usual ways a Java system property can be set. TrAX picks from them in this order:

  1. System.setProperty( "javax.xml.transform.TransformerFactory", "classname")

  2. The value specified at the command line using the -Djavax.xml.transform.TransformerFactory=classname option to the java interpreter

  3. The class named in the lib/jaxp.properties properties file in the JRE directory, in a line like this one:

     javax.xml.transform.TransformerFactory=classname

  4. The class named in the META-INF/services/javax.xml.transform.TransformerFactory file in the JAR archives available to the runtime

  5. Finally, if all of the above options fail, TransformerFactory.newInstance() returns a default implementation. In Sun’s JDK 1.4, this is Xalan 2.2d10.