On a related argument, how do you print QRCodes or barcodes on the pdf?
Il 27/01/2022 14:52, Ilya Obshadko ha scritto:
I've been using FOP to generate PDFs from the Tapestry application for
quite a few years. There's nothing specific to Tapestry, you just create a
"rendering service" which does all the processing for you. The only caveat
I remember is using Saxon instead of Xalan for running initial
transformation (it's *much* faster and has a lower memory footprint).
This is the entire code responsible for producing PDF:
// 1) create transformer
if (fopFactory == null) {
fopFactory = FopFactory.newInstance();
final URL fopConfigResource =
getClass().getClassLoader().getResource(FOP_CONFIG_URL);
final URL fontsDirectoryResource =
getClass().getClassLoader().getResource("your/font/package");
assert fopConfigResource != null && fontsDirectoryResource != null;
fopFactory.setUserConfig(fopConfigResource.toExternalForm());
fopFactory.getFontManager().setFontBaseURL(fontsDirectoryResource.toExternalForm());
}
// use Saxon instead of Xalan
System.setProperty("javax.xml.transform.TransformerFactory",
"net.sf.saxon.TransformerFactoryImpl");
TransformerFactory transformerFactory = TransformerFactory.newInstance();
// register Saxon extension functions
TransformerFactoryImpl saxonFactory = (TransformerFactoryImpl)
transformerFactory;
Configuration configuration = saxonFactory.getConfiguration();
extensionFunctions.getAvailableFunctions(activeLocale).forEach(configuration::registerExtensionFunction);
// initialize transformer
Source template = new StreamSource(templateStream);
Transformer transformer = transformerFactory.newTransformer(template);
// 2) serialize object to xml
File tmpFile = File.createTempFile("fop", ".xml");
FileOutputStream marshallerOutputStream = new FileOutputStream(tmpFile);
JAXBContext jaxbContext = JAXBContext.newInstance(object.getClass());
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(object, marshallerOutputStream);
marshallerOutputStream.close();
logger.info("marshaller result: {}, {} bytes", tmpFile, tmpFile.length());
// 3) perform transformation
FileInputStream fopInputStream = new FileInputStream(tmpFile);
FOUserAgent foUserAgent = fopFactory.newFOUserAgent();
foUserAgent.setProducer("producer name");
foUserAgent.setCreationDate(new Date());
Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, outputStream);
Source xmlSource = new StreamSource(fopInputStream);
Result pdfResult = new SAXResult(fop.getDefaultHandler());
transformer.transform(xmlSource, pdfResult);
fopInputStream.close();
if (!tmpFile.delete())
logger.warn("unable to remove temporary file {}", tmpFile);
There's basically nothing else. After processing, *outputStream* will
contain your PDF. Note that my example includes:
- using custom fonts (you probably don't need this);
- using custom extension functions for Saxon (you probably don't need
this either).
Otherwise it's pretty much straightforward.
On Thu, Jan 27, 2022 at 9:19 AM Volker Lamp<volker.l...@gmail.com> wrote:
Hello Tapestry users,
Our Tapestry webapp needs to generate printable PDFs including user input.
We are currently looking at using Apache FOP for that.
Has anyone integrated FOP in their Tapestry webapp and perhaps a Tapestry
module to share?
Suggestions for other approaches are also welcome.
Cheers,
Volker
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