returned by TransformerFactory.newInstance() is not a SAXTransformerFactory
**/
public TransformerXMLSerializerFactory(){
TransformerFactory tf = TransformerFactory.newInstance();
if(!tf.getFeature(SAXTransformerFactory.FEATURE) || !(tf instanceof SAXTransformerFactory)){
throw new TransformerFactoryConfigurationError(
tf.getClass().getName() +
" is not a SAXTransformerFactory." +
"Please set the system property " +
"javax.xml.transform.TransformerFactory to a "+
"SAXTransformerFactory implementation.") ;