PDF-HUL: Negative value for pdf.ObjectCount with JHOVE 1.34

[asciim0]

While the pdf.ObjectCount has always been off in JHOVE it now takes a particiular turn with JHOVE 1.34.

As hinted at in this fix #989 JHOVE takes the pdf.ObjectCount value from the count of the xref. However, I believe that JHOVE runs into problems when the cross-reference table is a included as a cross-reference stream.
Previously, whenver JHOVE couldn't adequatly report the number of objects, it would return "0". Since JHOVE 1.34 it now returns "-1".

Both are incorrect as a valid PDF cannot have 0 objects (let alone -1), but for backwards compatablity it might make sense to keep the value as "0" for now and to investigate into a more concrete fix to report something more meaningful for pdf.ObjectCount.

Could you also please answer based on what the pdf.ObjectCount is reported? Is a a simple count of the xref entries? If so, does it count through multiple xrefs if present or only the last or first one found?

[carlwilson]

Hi @asciim0 that's interesting and probably a side effect of some of the recent XREF fixes. I agree that only one (and preferably none) wrong answer options is better. I'll take a comb through the code and report back here.