Try this.
// ---
// 1. Get a Source for XML document
// ---
// a) from string
Source strSource = new StreamSource(new StringReader(xmlData));
// ---
// 2. Get stylesheet transformer
// ---
// from file, see above examples for other types of XSL input
//TransformerFactory
TransformerFactory transformerFactory = TransformerFactory.newInstance ();
Templates template = transformerFactory.newTemplates( new StreamSource(
xslLayout ));
// note - template object is multi-threaded and should be cached if you
// plan to use the same XSL repeatedly
Transformer transformer = template.newTransformer();
// ---
// 3. Create FOP driver and set rendering mode and output stream
// ---
Driver driver = new Driver();
driver.setRenderer(driver.RENDER_PDF);
ByteArrayOutputStream baos = new ByteArrayOutputStream ();
driver.setOutputStream( baos);
// initialize logger - see sample code on FOP website
driver.setLogger(setLogger());
// ---
// 4. Create SAXResult based on FOP Driver content handler
// which will accept SAX events and build FOP tree
// ---
Result saxResult = new SAXResult( driver.getContentHandler() );
// 5. Use the Transformer to transform an XML Source and
// send the output to a Result object. Implicitely it will
// create the FOP tree by firing SAX events.
transformer.transform( strSource, saxResult );
// 6. Your user is already viewing the PDF!
response.getOutputStream().flush();
response.getOutputStream().close();
-Original Message-
From: Anil R. Pinto [mailto:[EMAIL PROTECTED]
Sent: June 21, 2002 1:35 PM
To: '[EMAIL PROTECTED]'
Subject: Using Xalan Transformer with FOP Driver problem
Hi,
I have been using FOP to create PDF files for sometime now. Mostly as
embedded code within my Struts Action classes, as mentioned in
http://xml.apache.org/fop/embedding.html and it has been working just fine.
But this method requires the xml source to exist only as a java.io.File (if
I am not mistaken), with no provision as an in memory object - like a Java
String or Stream for example.
So when I looked at the Xalan site and this mailing list I saw the in
memory implementation possible with the TransformerFactory and Transformer
classes in Xalan. So, I tried this with a simple xml and xsl to test the
concept first. But, I seem to be getting the error
building formatting object tree
building formatting object tree
javax.xml.transform.TransformerException
at
org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerIm
pl.java:1212)
at
org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:2894)
at java.lang.Thread.run(Thread.java:484)
-
java.lang.NullPointerException
at
org.apache.fop.fo.FOTreeBuilder.startDocument(FOTreeBuilder.java:167)
at
org.apache.xalan.transformer.QueuedStartDocument.flush(QueuedStartDocume
nt.java:108)
at
org.apache.xalan.transformer.ResultTreeHandler.flushPending(ResultTreeHa
ndler.java:758)
at
org.apache.xalan.transformer.ResultTreeHandler.startElement(ResultTreeHa
ndler.java:245)
at
org.apache.xalan.transformer.ResultTreeHandler.startElement(ResultTreeHa
ndler.java:209)
at
org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j
ava:704)
at
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans
formerImpl.java:2154)
at
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans
formerImpl.java:2097)
at
org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(Transfo
rmerImpl.java:2029)
at
org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerIm
pl.java:1189)
at
org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:2894)
at java.lang.Thread.run(Thread.java:484)
javax.xml.transform.TransformerException
at
org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerIm
pl.java:1212)
at
org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:2894)
at java.lang.Thread.run(Thread.java:484)
-
java.lang.NullPointerException
at
org.apache.fop.fo.FOTreeBuilder.startDocument(FOTreeBuilder.java:167)
at
org.apache.xalan.transformer.QueuedStartDocument.flush(QueuedStartDocume
nt.java:108)
at
org.apache.xalan.transformer.ResultTreeHandler.flushPending(ResultTreeHa
ndler.java:758)
at
org.apache.xalan.transformer.ResultTreeHandler.startElement(ResultTreeHa
ndler.java:245)
at org.apache.xalan.transformer.ResultTreeHandler.startElement(R
esultTreeHandler.java:209)
at
org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j
ava:704)
at
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans
formerImpl.java:2154)
at
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans
