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;
}
}
private void addNodes(PdfObjectTreeNode parent, PdfObjectTreeNode child) {
try {
parent.add(child);
} catch (IllegalArgumentException iae) {
parent.setRecursive(true);
}
}
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;
}
public PdfObjectTreeNode getAncestor() {
if (isRecursive()) {
PdfObjectTreeNode node = this;
while (true) {
node = (PdfObjectTreeNode) node.getParent();
if (node.isIndirectReference() && node.getNumber() == getNumber()) {
return node;
}
}
}
return null;
}
/**
* Creates a node corresponding with a node in the PdfTree.
*
* @param node a corresponding node
*/
public FormTreeNode(PdfObjectTreeNode node) {
super("form.png");
this.object_node = node;
if (node.isDictionary()) {
PdfDictionary dict = (PdfDictionary) node.getPdfObject();
PdfObject fieldname = dict.get(PdfName.T);
if (fieldname != null) {
this.setUserObject(fieldname);
} else {
this.setUserObject("unnamed field");
}
}
}
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));
}
}
@SuppressWarnings("unchecked")
public PdfObjectTreeNode getChildNode(PdfObjectTreeNode node, PdfName key) {
Enumeration<PdfObjectTreeNode> children = node.breadthFirstEnumeration();
PdfObjectTreeNode child;
while (children.hasMoreElements()) {
child = children.nextElement();
if (child.isDictionaryNode(key)) {
if (child.isIndirectReference()) {
expandNode(child);
child = (PdfObjectTreeNode) child.getFirstChild();
}
expandNode(child);
return child;
}
}
return null;
}
public static PdfObjectTreeNode getInstance(PdfDictionary dict, PdfName key) {
PdfObjectTreeNode node = getInstance(dict.get(key));
node.setUserObject(getDictionaryEntryCaption(dict, key));
node.key = key;
return node;
}
public static PdfObjectTreeNode getInstance(PdfObject object, int number) {
PdfObjectTreeNode node = getInstance(object);
node.number = number;
return node;
}