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From: bugzilla@apache.org
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Subject: DO NOT REPLY [Bug 52764] Unmodified cell comments disappear after
 HSSFWorkbook.write
Date: Sat, 25 Feb 2012 14:12:59 +0000
Message-ID: <bug-52764-47293-MK54WvMLFF@https.issues.apache.org/bugzilla/>
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https://issues.apache.org/bugzilla/show_bug.cgi?id=52764

Laszlo Kustra <kl223hun@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #2 from Laszlo Kustra <kl223hun@gmail.com> 2012-02-25 14:12:59 UTC ---
(In reply to comment #1)
> How are you creating the additional comments? Does it by any chance include a
> call to createDrawingPatriarch?
> 
> If so, you should note the warning in the javadocs - 
> http://poi.apache.org/apidocs/org/apache/poi/hssf/usermodel/HSSFSheet.html#createDrawingPatriarch()
> - "This will have the effect of removing any existing drawings on this sheet."
> 
> (Comments are a kind of drawing)

Please have a look at the attached test program to see the answer for yourself.
I only call the createDrawingPatriarch() method once, when creating the sheet.
The second time, after loading the file from the disk to modify cell comments,
I call the getDrawingPatriarch() method to get the existing instance.

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