kesh...@us.ibm.com wrote on 11/11/2010 09:01:09 AM: > 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;
That's never been true for Xerces and I'm not just talking about deferred DOM. None of its DOM implementations are thread-safe even for read-only usage. > 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 > > Michael Glavassevich XML Parser Development IBM Toronto Lab E-mail: mrgla...@ca.ibm.com E-mail: mrgla...@apache.org
