Filtered? No. Inaccessible from the root following various indirect
references? Yep. That's why their unused.
If you really don't want to touch the source, you should be able to step
through all the objects before and after RemoveUnusedObjects, and dump
the ones that were removed after the fact.
Here's some pseudocode.
Map<int, str> allObjects
For each indirect object in the reader
allObjects.put(obj number, string representation);
RemoveUnusedObjects();
for each indirect object in the reader
allObjects.remove(obj number);
for each entry in allObjects
System.out.println(entry.value);
For PdfArrays and PdfDictionaries, you should be able to use the
toString() of the underlying ArrayList or HashMap. For PdfStreams, you
probably just want to note that its a stream unless you really want to
show all the binary data of some image/font/content stream. The last
might be interesting, but the binary gobbledegook of images and fonts
probably won't tell you much.
--Mark Storer
Senior Software Engineer
Cardiff.com
import legalese.Disclaimer;
Disclaimer<Cardiff> DisCard = null;
Autonomy Corp., an HP Company
________________________________
From: WMJ [mailto:[email protected]]
Sent: Thursday, October 06, 2011 4:32 PM
To: Post all your questions about iText here
Subject: Re: [iText-questions] What are those unused objects in
a PDFdocument
It seems that those unused objects are already filtered when the
document is loaded and the only way to inspect them is to hack the
source code.
________________________________
Subject: RE: [iText-questions] What are those unused
objects in a PDF document
You could hack the source to dump a string
representation of those objects to System.out prior to removing them.
Shouldn't be too hard.
--Mark Storer
Senior Software Engineer
Cardiff.com
import legalese.Disclaimer;
Disclaimer<Cardiff> DisCard = null;
Autonomy Corp., an HP Company
________________________________
From: WMJ [mailto:[email protected]]
Sent: Thursday, October 06, 2011 2:17 AM
To: [email protected]
Subject: [iText-questions] What are those unused
objects in a PDF document
Hello,
I find that there's a RemoveUnusedObjects method
in the PdfReader class.
It seems that there can be some objects which
are not referenced by other objects and hence are "unused".
Some PDF files, after processed by the
RemoveUnusedObjects, can dramatically reduce to 30% the size of the
original one.
I wondered what's inside those unused objects.
Is it possible to find out what things are in
those removed objects?
WMJ
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