The transformer does not alter the source document. Caveat: Remember that the DOM API is not promised to be threadsafe even in read-only usage. Most implementations are safe when only being read, but that isn't guaranteed; if you require that, be sure you document the requirement in case someone later wants to run your code against a different DOM.
______________________________________ "... Three things see no end: A loop with exit code done wrong, A semaphore untested, And the change that comes along. ..." -- "Threes" Rev 1.1 - Duane Elms / Leslie Fish ( http://www.ovff.org/pegasus/songs/threes-rev-11.html) Prabu <prabudhaks...@gmail.com> wrote on 11/11/2010 12:53:42 AM: > From: > > Prabu <prabudhaks...@gmail.com> > > To: > > xalan-j-users@xml.apache.org > > Date: > > 11/11/2010 12:53 AM > > Subject: > > transform method: Does it do Read only operation on the source? > > Am using xalan-java to apply xsl rules on xml files. Initially I create > a DOM node (call it doc) from xml by using the DocumentBuilder. > My intention is to apply multiple rules on the same xml file > in multiple threads, one thread per rule - I create separate > Transformer objects in each thread as seen below. > > =====Code snippet - Thread's Run method ==== > > ... > ... > TransformerFactory tFactory = TransformerFactory.newInstance(); > Transformer transformer = tFactory.newTransformer > (new > StreamSource(ruleLocation)); > DOMResult domResult = new DOMResult(); > transformer.transform(new DOMSource(doc), domResult); > ... > ... > > ================== > > In the above code, I want to know whether the transform method > does only read-only operation on the document source "doc". > If it affects the source, then it will not be thread safe to run rules > on the same xml. > > > -- > > Thanks, > Prabu D >
