Enhancement : NPE exception when the StreamSource with null inputstream in XMLFragment is wrote to OutputStream

XMLFragment throws exception when client dispatch a StreamSource request:

StreamSource requestSource = new StreamSource(new File(requetMessage.xml));
dispatch.invoke(requestSource);

Here the input stream of requestSource is null , the StreamSource constructor uses file.toURI() to set the systemId value . We can do some enhancement to create Input stream internally from the systemId for this case.

Anyway constructs a StreamSource with InputStream or Reader will be more informative than StreamSource(File f) for StreamSource consumer to know where to get/read the data source .