FOPpdf

public class FOPpdf {

    public InputStream toDo(InputStream xmlStream) throws TransformerException, IOException, ConfigurationException, SAXException {

        File xsltfile = new File("HelloWorld.xsl");
        StreamSource source = new StreamSource (xmlStream);
        StreamSource transformSource = new StreamSource(xsltfile);
        FopFactory fopFactory = FopFactory.newInstance();

        DefaultConfigurationBuilder cfgBuilder = new DefaultConfigurationBuilder();
        File file1 = new File("fonts.xsl");
        Configuration cfg = cfgBuilder.buildFromFile(file1);
        fopFactory.setUserConfig(cfg);


        FOUserAgent foUserAgent = fopFactory.newFOUserAgent();
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        Transformer xslfoTransformer;

        try {
            xslfoTransformer = getTransformer(transformSource);
            Fop fop;
            try {
                fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, outStream);

                Result res = new SAXResult(fop.getDefaultHandler());

                try {


                    xslfoTransformer.transform(source, res);

                    return new ByteArrayInputStream(outStream.toByteArray());

                } catch (TransformerException e) {
                    throw e;
                }
            } catch (FOPException e) {
                throw e;
            }
        } catch (TransformerConfigurationException e) {
            throw e;
        } catch (TransformerFactoryConfigurationError e) {
            throw e;
        }
    }

    private Transformer getTransformer(StreamSource streamSource) {
        TransformerFactoryImpl impl = new TransformerFactoryImpl();
        try {
            return impl.newTransformer(streamSource);
        } catch (TransformerConfigurationException e) {
           throw new RuntimeException(e);
        }
    }

}