/**
* extract clickable links from pdf
*
* @param pdf the document to parse
* @return all detected links
*/
private Collection<AnchorURL>[] extractPdfLinks(final PDDocument pdf) {
@SuppressWarnings("unchecked")
List<PDPage> allPages = pdf.getDocumentCatalog().getAllPages();
@SuppressWarnings("unchecked")
Collection<AnchorURL>[] linkCollections =
(Collection<AnchorURL>[]) new Collection<?>[allPages.size()];
int pagecount = 0;
for (PDPage page : allPages) {
final Collection<AnchorURL> pdflinks = new ArrayList<AnchorURL>();
try {
List<PDAnnotation> annotations = page.getAnnotations();
if (annotations != null) {
for (PDAnnotation pdfannotation : annotations) {
if (pdfannotation instanceof PDAnnotationLink) {
PDAction link = ((PDAnnotationLink) pdfannotation).getAction();
if (link != null && link instanceof PDActionURI) {
PDActionURI pdflinkuri = (PDActionURI) link;
String uristr = pdflinkuri.getURI();
AnchorURL url = new AnchorURL(uristr);
pdflinks.add(url);
}
}
}
}
} catch (IOException ex) {
}
linkCollections[pagecount++] = pdflinks;
}
return linkCollections;
}
@Override
protected void endPage(PDPage page) throws IOException {
try {
EmbeddedDocumentExtractor extractor = getEmbeddedDocumentExtractor();
for (PDAnnotation annotation : page.getAnnotations()) {
if (annotation instanceof PDAnnotationFileAttachment) {
PDAnnotationFileAttachment fann = (PDAnnotationFileAttachment) annotation;
PDComplexFileSpecification fileSpec = (PDComplexFileSpecification) fann.getFile();
try {
extractMultiOSPDEmbeddedFiles(fann.getAttachmentName(), fileSpec, extractor);
} catch (SAXException e) {
throw new IOExceptionWithCause("file embedded in annotation sax exception", e);
} catch (TikaException e) {
throw new IOExceptionWithCause("file embedded in annotation tika exception", e);
} catch (IOException e) {
handleCatchableIOE(e);
}
}
// TODO: remove once PDFBOX-1143 is fixed:
if (config.getExtractAnnotationText()) {
if (annotation instanceof PDAnnotationLink) {
PDAnnotationLink annotationlink = (PDAnnotationLink) annotation;
if (annotationlink.getAction() != null) {
PDAction action = annotationlink.getAction();
if (action instanceof PDActionURI) {
// can't currently associate link to text.
// for now, extract link and repeat the link as if it
// were the visible text
PDActionURI uri = (PDActionURI) action;
String link = uri.getURI();
if (link != null && link.trim().length() > 0) {
xhtml.startElement("div", "class", "annotation");
xhtml.startElement("a", "href", link);
xhtml.characters(link);
xhtml.endElement("a");
xhtml.endElement("div");
}
}
}
}
if (annotation instanceof PDAnnotationMarkup) {
PDAnnotationMarkup annotationMarkup = (PDAnnotationMarkup) annotation;
String title = annotationMarkup.getTitlePopup();
String subject = annotationMarkup.getSubject();
String contents = annotationMarkup.getContents();
// TODO: maybe also annotationMarkup.getRichContents()?
if (title != null || subject != null || contents != null) {
xhtml.startElement("div", "class", "annotation");
if (title != null) {
xhtml.startElement("div", "class", "annotationTitle");
xhtml.characters(title);
xhtml.endElement("div");
}
if (subject != null) {
xhtml.startElement("div", "class", "annotationSubject");
xhtml.characters(subject);
xhtml.endElement("div");
}
if (contents != null) {
xhtml.startElement("div", "class", "annotationContents");
xhtml.characters(contents);
xhtml.endElement("div");
}
xhtml.endElement("div");
}
}
}
}
if (config.getOCRStrategy().equals(PDFParserConfig.OCR_STRATEGY.OCR_AND_TEXT_EXTRACTION)) {
doOCROnCurrentPage();
}
xhtml.endElement("div");
} catch (SAXException | TikaException e) {
throw new IOExceptionWithCause("Unable to end a page", e);
} catch (IOException e) {
exceptions.add(e);
} finally {
pageIndex++;
}
}
