COSStreamArray NullPointerException. firstStream is null if COSArray contains
no items
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Key: PDFBOX-898
URL: https://issues.apache.org/jira/browse/PDFBOX-898
Project: PDFBox
Issue Type: Bug
Components: Parsing
Affects Versions: 1.3.1
Reporter: Martijn Brinkers
COSStreamArray checks whether array contains any items. If array is empty
firstStream is not set and therefore null.
public COSStreamArray( COSArray array )
{
super( new COSDictionary(), null );
streams = array;
if( array.size() > 0 )
{
firstStream = (COSStream)array.getObject( 0 );
}
}
Most methods of COSStreamArray however use firstStream without any checks which
can result in a NullPointerException.
I have a PDF that when parsed, results in a NPE because
COSStreamArray#getScratchFile is called while firstStream is null.
One option would be to not create an instance of COSStreamArray when there are
no items in the array.
A patch is attached that checks whether the array is empty and only creates an
instance of there are any items.
The PDF was created with:
LaTeX with hyperref package
PDF-1.2
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