public void expandNode(PdfObjectTreeNode node) {
if (node.getChildCount() > 0) {
return;
}
PdfObject object = node.getPdfObject();
PdfObjectTreeNode leaf;
switch (object.type()) {
case PdfObject.INDIRECT:
PdfIndirectReference ref = (PdfIndirectReference) object;
leaf = getNode(ref.getNumber());
addNodes(node, leaf);
if (leaf instanceof PdfPagesTreeNode) expandNode(leaf);
return;
case PdfObject.ARRAY:
PdfArray array = (PdfArray) object;
for (Iterator<PdfObject> it = array.listIterator(); it.hasNext(); ) {
leaf = PdfObjectTreeNode.getInstance(it.next());
addNodes(node, leaf);
expandNode(leaf);
}
return;
case PdfObject.DICTIONARY:
case PdfObject.STREAM:
PdfDictionary dict = (PdfDictionary) object;
for (Iterator<PdfName> it = dict.getKeys().iterator(); it.hasNext(); ) {
leaf = PdfObjectTreeNode.getInstance(dict, it.next());
addNodes(node, leaf);
expandNode(leaf);
}
return;
}
}
public TreeNodeFactory(IndirectObjectFactory objects) {
this.objects = objects;
for (int i = 0; i < objects.size(); i++) {
int ref = objects.getRefByIndex(i);
nodes.add(PdfObjectTreeNode.getInstance(PdfNull.PDFNULL, ref));
}
}
public PdfObjectTreeNode getNode(int ref) {
int idx = objects.getIndexByRef(ref);
PdfObjectTreeNode node = nodes.get(idx);
if (node.getPdfObject().isNull()) {
node = PdfObjectTreeNode.getInstance(objects.loadObjectByReference(ref), ref);
nodes.set(idx, node);
}
return node;
}