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https://issues.apache.org/jira/browse/PDFBOX-4476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16780204#comment-16780204
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Derek Liu commented on PDFBOX-4476:
-----------------------------------
This code on screen shot is my changed result. The original code is:
{code}
private List<COSDictionary> getKids(COSDictionary node)
{
List<COSDictionary> result = new ArrayList<>();
COSArray kids = node.getCOSArray(COSName.KIDS);
if (kids == null)
{
// probably a malformed PDF
return result;
}
for (int i = 0, size = kids.size(); i < size; i++)
{
COSBase base = kids.getObject(i);
if (base instanceof COSDictionary)
{
result.add((COSDictionary) base);
}
else
{
LOG.warn("COSDictionary expected, but got " +
base.getClass().getSimpleName());
}
}
return result;
}
{code}
> Need handle the NullPointerException in PDPageTree
> --------------------------------------------------
>
> Key: PDFBOX-4476
> URL: https://issues.apache.org/jira/browse/PDFBOX-4476
> Project: PDFBox
> Issue Type: Bug
> Reporter: Derek Liu
> Priority: Major
> Attachments: image-2019-02-28-13-24-27-954.png
>
>
> In class PDPageTree, the log will raise NPE error if "base" is null.
> !image-2019-02-28-13-24-27-954.png!
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