/**
* This method scans the document for all WidgetAnnotation objects.
*
* <p>This is done because some writer do not create a correct list of all PDAcroFormField objects
* in the AcroForm. In the case that the list of children is empty, we go and search ourselves for
* candidates...
*
* @param doc The document to reconstruct.
*/
protected COSArray reconstruct(PDDocument doc) {
COSArray result = COSArray.create();
if (doc == null) {
return result;
}
PDPageTree pageTree = doc.getPageTree();
if (pageTree == null) {
return result;
}
boolean signatureExists = false;
for (PDPage page = pageTree.getFirstPage(); page != null; page = page.getNextPage()) {
List annotations = page.getAnnotations();
if (annotations == null) {
continue;
}
for (Iterator it = annotations.iterator(); it.hasNext(); ) {
PDAnnotation annot = (PDAnnotation) it.next();
if (annot.isWidgetAnnotation()) {
COSDictionary cosAnnot = annot.cosGetDict();
result.basicAddSilent(cosAnnot);
cosAnnot.basicRemoveSilent(PDAcroFormField.DK_Parent);
signatureExists |= cosAnnot.get(PDAcroFormField.DK_FT).equals(PDAcroFormField.CN_FT_Sig);
}
}
}
if (signatureExists) {
int flags = getFieldInt(PDAcroForm.DK_SigFlags, 0);
flags |= AcroFormSigFlags.Bit_AppendOnly | AcroFormSigFlags.Bit_SignatureExists;
cosGetDict().basicPutSilent(PDAcroForm.DK_SigFlags, COSInteger.create(flags));
}
return result;
}
/**
* The destination page. ATTENTION: it is common have dangling destinations to invalid (null)
* pages around!
*
* @return The destination page. Be sure to handle null return values.
*/
public PDPage getPage(PDDocument doc) {
COSArray definition = cosGetArray();
COSObject page = definition.get(0);
if (page.asNumber() != null) {
int pageIndex = page.asNumber().intValue();
return doc.getPageTree().getPageAt(pageIndex);
}
if (page.asDictionary() != null) {
return (PDPage) PDPageNode.META.createFromCos(page.asDictionary());
}
return null;
}
