I was just looking at the FOP API JavaDocs. Can I use getContentHanlder from the Driver object, send that into the transformer wrapped in a SAXResults object? Will this populate FOP with the required data to do the XSL:FO transform?
On Fri, Mar 22, 2002 at 11:22:12AM -0500, David B. Bitton wrote: > 1000/N > Status: O > X-Status: > X-Keywords: > X-UID: 600 > > Ok this is what I'm doing: > > I produce an XML file from data stored on a mainframe. The XML is generate in a VB >object. The XML is > passed up to an ASP page that makes a Low Level API SOAP call, using MSSOAP Toolkit >2.0, to my PDF server. > The PDF server is running Tomcat 4/Apache SOAP 2.2. > > On the PDF server, I receive the XML as literalxml in the envelope, fetch a >stylesheet, pass the Element > object to a Xalan 2.3 transformer (wrapped in a DOMSource object), and then >transform the XML into XSL:FO > objects. > > Now I have a Document object that was returned from the transformer wrapped in a >DOMResults object. The > next step is where the problem lies. I want to pass the Document to a Driver, but I >get the dreaded > NullPointerException. > > Most of the time, the XML is will be small ( 5 - 7K), but there is a potention for >an account to have 5 to > 10 thousand transactions in a day, and we store up to 63 days of data (a single >transaction in XML is 594 > bytes, therefore a 630K transaction XML file would be 374MB, plus some extra data at >the top). So you can > see what I have the potential to deal with. > > What I don't even know is how FOP will handle this. The XSL:FO file is sure to be >much larger than 380MB. > I transformer a 6.66KB XML file and it produced a XSL:FO file of 16.2KB. If we use >that as a benchmark, > than the same 374MB would become 909.8MB. That's a whole lot of RAM, not to mention >what FOP is going to > use to store the rendered PDF. > > I'm hoping that someone can poke a hole in these numbers (please), because this is >getting to look a whole > lot bigger than expected. Obviously performance and resource utilization are major >concernes (like when are > they not?). Obviously SAX for this would be faster because it wouldn't require >loading the entire XML > contents into memory. > > So, now is here the questions come in. Do I return from the transform a SAXResults? > Also, how do I > effectively handle the incoming XML into the SOAP method? I would prefer to send >the XML in literalxml > format so the < and > are HTML encoded (increasing the size of the content even >more). > > Where do I go from here? > > > On Fri, Mar 22, 2002 at 04:49:40PM +0100, Jeremias Maerki wrote: > > <comment>Oops, that one didn't make it to the list at first.</comment> > > > > DOM (Document) should work. But using DOM to process a 400MB XML? You > > wouldn't want to do that. Try to find a way to use SAX. You can fill SAX > > events into FOP to create the FO tree. Maybe it helps us to provide you > > with some pointers and ideas if you tell us what exactly you're trying > > to do. > > > > > I'm sorry to post this again but I need help. Does passing a Document >datatype to the Driver > > > render() method work? I have to potential to move XML files in excess of 400MB >and so I need to avoid as > > > moving of data in memory as possible. > > > > Cheers, > > Jeremias M?rki > > > > mailto:[EMAIL PROTECTED] > > > > OUTLINE AG > > Postfach 3954 - Rhynauerstr. 15 - CH-6002 Luzern > > Tel. +41 41 317 2020 - Fax +41 41 317 2029 > > Internet http://www.outline.ch > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, email: [EMAIL PROTECTED] > > -- > > David B. Bitton > [EMAIL PROTECTED] > > Diversa ab illis virtute valemus. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] -- David B. Bitton [EMAIL PROTECTED] Diversa ab illis virtute valemus. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
