[PDFBOX-856] NPE from PDPageLabels with a large number PDPageLabelRanges

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2.1
• Fix Version/s: 1.3.1
• Component/s: PDModel
• Assignee: Andreas Lehmkühler
• Reporter: Kevin Jackson
• Created: 07/Oct/10 15:13
• Updated: 24/Mar/13 14:44
• Resolved: 17/Oct/10 17:36

Description

Section 3.8.6 states that number trees have either "Nums" or "Kids" entries. The current PDPageLabels does not handle Kids and fails with a NPE.

Fix:

public PDPageLabels(PDDocument document, COSDictionary dict) throws IOException
{
this(document);
if (dict == null)

{ return; }

PDNumberTreeNode root = new PDNumberTreeNode(dict, COSDictionary.class);
findLabels(root);
}

private void findLabels(PDNumberTreeNode node) throws IOException {
if (node.getKids() != null) {
@SuppressWarnings("unchecked")
List<PDNumberTreeNode> kids = node.getKids();
for (PDNumberTreeNode kid : kids)

{ findLabels(kid); }

}
else if (node.getNumbers() != null) {
@SuppressWarnings("unchecked")
Map<Integer, COSDictionary> numbers = node.getNumbers();
for (Entry<Integer, COSDictionary> i : numbers.entrySet())

{ labels.put(i.getKey(), new PDPageLabelRange(i.getValue())); }

}
}