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https://issues.apache.org/jira/browse/XALANJ-2537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17737909#comment-17737909
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Joe Kesselman commented on XALANJ-2537:
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Handling huge documents is a problem for any XSLT processor. XSLT 3.0
introduced the concept of a streaming subset of the language specifically for
that purpose, and IBM has some patents (but not product as far as I know) on
the topic of how to optimize/rewrite a stylesheet into a streamable form.
That might or might not address this use case. If not, huge amounts of memory
or partitioning the problem may be unavoidable.
I believe Saxon does have some streaming capability, though I don't know how
much.
IBM's DB2 database does support XQuery, which is functionally equivalent to
XSLT; I don't know whether it supports XSLT syntax. Since DB2 scales up to huge
data structures, it might be able to run queries that Xalan will never be able
to handle directly.
> The SAX exception occurs in Tansformer.transform() for a very large xml
> string as input.
> -----------------------------------------------------------------------------------------
>
> Key: XALANJ-2537
> URL: https://issues.apache.org/jira/browse/XALANJ-2537
> Project: XalanJ2
> Issue Type: Bug
> Security Level: No security risk; visible to anyone(Ordinary problems in
> Xalan projects. Anybody can view the issue.)
> Components: SAX
> Affects Versions: 2.7
> Environment: Linux
> Reporter: Deepthi BakkaVemana
> Priority: Blocker
> Labels: sax_exception_for_Largexml
>
> We are using xalan 2.7.0 and fop 0.95 for generating PDF reports.While
> generating pdf report for a large xml string of 2,96,126 characters(~ nearly
> 3 lakh characters) ,the PDF generation fails and it fails at
> transformer.transform() method in TransformerImpl.java.Since in our
> product,we need large reports with very large strings(events),we need this
> fix ASAP.
> I et the below exception: javax.xml.transform.TransformerException:
> org.xml.sax.SAXException: Mismatch: page-sequence
> (http://www.w3.org/1999/XSL/Format) vs. root
> (http://www.w3.org/1999/XSL/Format)
> at
> org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:725)
> at
> org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2243)
> at
> org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2069)
> at
> org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1171)
> at
> org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:634)
> at
> org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1088)
> at
> org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1066)
> at
> com.ca.calm.reporter.pdf.PDFGenerator.buildPdf(PDFGenerator.java:1312)
> at
> com.ca.calm.reporter.pdf.PDFGenerator.generatePdfForQueryView(PDFGenerator.java:1240)
> at
> com.ca.calm.reporter.pdf.PDFGenerator.exportPanel(PDFGenerator.java:186)
> at calmReporter.exportPanel(calmReporter.java:421)
> at calmReporter.handleRequest(calmReporter.java:161)
> our code:
> TransformerFactory factory = TransformerFactory.newInstance();
> Templates templates = factory.newTemplates(new
> SAXSource(new InputSource(
> new StringReader(xslContent))));
> Transformer transformer = templates.newTransformer();
> // Set the value of a <param> in the stylesheet
> transformer.setParameter("versionParam", "2.0");
> Result res = new SAXResult(fop.getDefaultHandler());
> String parserClass =
> "com.sun.org.apache.xerces.internal.parsers.SAXParser";
> if (((String)
> System.getProperties().get("java.version")).startsWith("1.4"))
> {
> parserClass =
> "org.apache.crimson.parser.XMLReaderImpl";
> }
> //String parserClass =
> "org.apache.crimson.parser.XMLReaderImpl";
> XMLReader reader =
> XMLReaderFactory.createXMLReader(parserClass);
> Source source = new SAXSource(reader, new
> InputSource(bufferedInputStream));
> transformer.transform(source, res); - this is the
> point of failure..
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