void propagate(PdfObject obj, PdfIndirectReference refo, boolean restricted) throws IOException {
if (obj == null) return;
// if (refo != null)
// addToBody(obj, refo);
if (obj instanceof PdfIndirectReference) return;
switch (obj.type()) {
case PdfObject.DICTIONARY:
case PdfObject.STREAM:
{
PdfDictionary dic = (PdfDictionary) obj;
for (PdfName key : dic.getKeys()) {
if (restricted && (key.equals(PdfName.PARENT) || key.equals(PdfName.KIDS))) continue;
PdfObject ob = dic.get(key);
if (ob != null && ob.isIndirect()) {
PRIndirectReference ind = (PRIndirectReference) ob;
if (!setVisited(ind) && !isPage(ind)) {
PdfIndirectReference ref = getNewReference(ind);
propagate(PdfReader.getPdfObjectRelease(ind), ref, restricted);
}
} else propagate(ob, null, restricted);
}
break;
}
case PdfObject.ARRAY:
{
// PdfArray arr = new PdfArray();
for (Iterator<PdfObject> it = ((PdfArray) obj).listIterator(); it.hasNext(); ) {
PdfObject ob = it.next();
if (ob != null && ob.isIndirect()) {
PRIndirectReference ind = (PRIndirectReference) ob;
if (!isVisited(ind) && !isPage(ind)) {
PdfIndirectReference ref = getNewReference(ind);
propagate(PdfReader.getPdfObjectRelease(ind), ref, restricted);
}
} else propagate(ob, null, restricted);
}
break;
}
case PdfObject.INDIRECT:
{
throw new RuntimeException(
MessageLocalization.getComposedMessage("reference.pointing.to.reference"));
}
}
}
/** @since 2.1.5; before 2.1.5 the method was private */
protected void updateCalculationOrder(PdfReader reader) {
PdfDictionary catalog = reader.getCatalog();
PdfDictionary acro = catalog.getAsDict(PdfName.ACROFORM);
if (acro == null) return;
PdfArray co = acro.getAsArray(PdfName.CO);
if (co == null || co.size() == 0) return;
AcroFields af = reader.getAcroFields();
for (int k = 0; k < co.size(); ++k) {
PdfObject obj = co.getPdfObject(k);
if (obj == null || !obj.isIndirect()) continue;
String name = getCOName(reader, (PRIndirectReference) obj);
if (af.getFieldItem(name) == null) continue;
name = "." + name;
if (calculationOrder.contains(name)) continue;
calculationOrder.add(name);
}
}
/**
* Returns a <CODE>PdfObject</CODE> as a <CODE>PdfIndirectReference</CODE>.
*
* <p>The object associated with the <CODE>PdfName</CODE> given is retrieved If it is a <CODE>
* PdfIndirectReference</CODE>, it is cast down and returned as such. Otherwise <CODE>null</CODE>
* is returned.
*
* @param key A <CODE>PdfName</CODE>
* @return the associated <CODE>PdfIndirectReference</CODE> object, or <CODE>null</CODE>
*/
public PdfIndirectReference getAsIndirectObject(final PdfName key) {
PdfIndirectReference ref = null;
PdfObject orig = get(key); // not getDirect this time.
if (orig != null && orig.isIndirect()) ref = (PdfIndirectReference) orig;
return ref;
}