After going through lots of FOP java code I managed to get it to work.
Descriptive version
Main idea is to force FOP to use custom PDFRendererConfigurator that will return desired font list when getCustomFontCollection() is executed.
In order to do it we need to create custom PDFDocumentHandlerMaker that will return custom PDFDocumentHandler (form method makeIFDocumentHandler()) which will in turn return our custom PDFRendererConfigurator (from getConfigurator() method) that, as above, will set out custom font list.
Then just add custom PDFDocumentHandlerMaker to RendererFactory and it will work.
FopFactory > RendererFactory > PDFDocumentHandlerMaker > PDFDocumentHandler > PDFRendererConfigurator
Full code
FopTest.java
public class FopTest {
public static void main(String[] args) throws Exception {
// the XSL FO file
StreamSource xsltFile = new StreamSource(
Thread.currentThread().getContextClassLoader().getResourceAsStream("template.xsl"));
// the XML file which provides the input
StreamSource xmlSource = new StreamSource(
Thread.currentThread().getContextClassLoader().getResourceAsStream("employees.xml"));
// create an instance of fop factory
FopFactory fopFactory = new FopFactoryBuilder(new File(".").toURI()).build();
RendererFactory rendererFactory = fopFactory.getRendererFactory();
rendererFactory.addDocumentHandlerMaker(new CustomPDFDocumentHandlerMaker());
// a user agent is needed for transformation
FOUserAgent foUserAgent = fopFactory.newFOUserAgent();
// Setup output
OutputStream out;
out = new java.io.FileOutputStream("employee.pdf");
try {
// Construct fop with desired output format
Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, out);
// Setup XSLT
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer(xsltFile);
// Resulting SAX events (the generated FO) must be piped through to
// FOP
Result res = new SAXResult(fop.getDefaultHandler());
// Start XSLT transformation and FOP processing
// That's where the XML is first transformed to XSL-FO and then
// PDF is created
transformer.transform(xmlSource, res);
} finally {
out.close();
}
}
}
CustomPDFDocumentHandlerMaker.java
public class CustomPDFDocumentHandlerMaker extends PDFDocumentHandlerMaker {
@Override
public IFDocumentHandler makeIFDocumentHandler(IFContext ifContext) {
CustomPDFDocumentHandler handler = new CustomPDFDocumentHandler(ifContext);
FOUserAgent ua = ifContext.getUserAgent();
if (ua.isAccessibilityEnabled()) {
ua.setStructureTreeEventHandler(handler.getStructureTreeEventHandler());
}
return handler;
}
}
CustomPDFDocumentHandler.java
public class CustomPDFDocumentHandler extends PDFDocumentHandler {
public CustomPDFDocumentHandler(IFContext context) {
super(context);
}
@Override
public IFDocumentHandlerConfigurator getConfigurator() {
return new CustomPDFRendererConfigurator(getUserAgent(), new PDFRendererConfigParser());
}
}
CustomPDFRendererConfigurator.java
public class CustomPDFRendererConfigurator extends PDFRendererConfigurator {
public CustomPDFRendererConfigurator(FOUserAgent userAgent, RendererConfigParser rendererConfigParser) {
super(userAgent, rendererConfigParser);
}
@Override
protected FontCollection getCustomFontCollection(InternalResourceResolver resolver, String mimeType)
throws FOPException {
List<EmbedFontInfo> fontList = new ArrayList<EmbedFontInfo>();
try {
FontUris fontUris = new FontUris(Thread.currentThread().getContextClassLoader().getResource("UbuntuMono-Bold.ttf").toURI(), null);
List<FontTriplet> triplets = new ArrayList<FontTriplet>();
triplets.add(new FontTriplet("UbuntuMono", Font.STYLE_NORMAL, Font.WEIGHT_NORMAL));
EmbedFontInfo fontInfo = new EmbedFontInfo(fontUris, false, false, triplets, null, EncodingMode.AUTO, EmbeddingMode.AUTO);
fontList.add(fontInfo);
} catch (Exception e) {
e.printStackTrace();
}
return createCollectionFromFontList(resolver, fontList);
}
}
<fo:root tag.font-family="UbuntuMono"in the given case. And it will work perfectly. – Vaccination