private void handleAnnotations()

in src/java/org/apache/fop/render/pdf/pdfbox/PDFBoxAdapter.java [480:552]
59 lines of code
14 McCabe index (conditional complexity)

    private void handleAnnotations(PDDocument sourceDoc, PDPage page, AffineTransform at, Rectangle pos)
        throws IOException {
        PDDocumentCatalog srcCatalog = sourceDoc.getDocumentCatalog();
        PDAcroForm srcAcroForm = srcCatalog.getAcroForm();
        List pageAnnotations = page.getAnnotations();
        if (srcAcroForm == null && pageAnnotations.isEmpty()) {
            return;
        }

        PDFBoxAdapterUtil.moveAnnotations(page, pageAnnotations, at, pos);

        //Pseudo-cache the target page in place of the original source page.
        //This essentially replaces the original page reference with the target page.
        COSObject cosPage = null;
        COSDictionary parentDic = (COSDictionary) page.getCOSObject().getDictionaryObject(COSName.PARENT, COSName.P);
        COSArray kids = (COSArray) parentDic.getDictionaryObject(COSName.KIDS);
        for (int i = 0; i < kids.size(); i++) {
            //Hopefully safe to cast, as kids need to be indirect objects
            COSObject kid = (COSObject) kids.get(i);
            if (!pageNumbers.containsKey(i)) {
                PDFArray a = new PDFArray();
                a.add(null);
                pdfDoc.assignObjectNumber(a);
                pdfDoc.addTrailerObject(a);
                pageNumbers.put(i, a);
            }
            cacheClonedObject(kid, pageNumbers.get(i));
            if (kid.getObject() == page.getCOSObject()) {
                cosPage = kid;
            }
        }
        if (cosPage == null) {
            throw new IOException("Illegal PDF. Page not part of parent page node.");
        }

        Set<?> fields = copyAnnotations(page, srcAcroForm);
        boolean formAlreadyCopied = getCachedClone(srcAcroForm) != null;
        PDFRoot catalog = this.pdfDoc.getRoot();
        PDFDictionary destAcroForm = (PDFDictionary)catalog.get(COSName.ACRO_FORM.getName());
        if (formAlreadyCopied) {
            //skip, already copied
        } else if (destAcroForm == null) {
            if (srcAcroForm != null) {
                //With this, only the first PDF's AcroForm is copied over. If later AcroForms have
                //different properties besides the actual fields, these get lost. Only fields
                //get merged.
                Collection exclude = Collections.singletonList(COSName.FIELDS);
                destAcroForm = (PDFDictionary)cloneForNewDocument(srcAcroForm, srcAcroForm, exclude);
            } else {
                //Work-around for incorrectly split PDFs which lack an AcroForm but have widgets
                //on pages. This doesn't handle the case where field dicts have "C" entries
                //(for the "CO" entry), so this may produce problems, but we have almost no chance
                //to guess the calculation order.
                destAcroForm = new PDFDictionary(pdfDoc.getRoot());
            }
            pdfDoc.assignObjectNumber(destAcroForm);
            pdfDoc.addTrailerObject(destAcroForm);
            catalog.put(COSName.ACRO_FORM.getName(), destAcroForm);
        }
        PDFArray clonedFields = (PDFArray) destAcroForm.get(COSName.FIELDS.getName());
        if (clonedFields == null) {
            clonedFields = new PDFArray();
            destAcroForm.put(COSName.FIELDS.getName(), clonedFields);
        }
        for (Object field : fields) {
            if (field instanceof COSBase) {
                field = cloneForNewDocument(field, field, Arrays.asList(COSName.KIDS));
            }
            if (!clonedFields.contains(field)) {
                clonedFields.add(field);
            }
        }
    }