private void processDocOnAction(String name, String annotationType, PDFileSpecification spec,
                                    AttributesImpl attributes)
            throws TikaException, SAXException, IOException {
        if (spec == null) {
            return;
        }
        processDoc(name, annotationType, spec, attributes);
        extractedFiles.add(spec.getCOSObject());
    }
Format used for signature dates
TODO Make this thread-safe
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-pdf-module/src/main/java/org/apache/tika/parser/pdf/AbstractPDF2XHTML.java