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https://issues.apache.org/jira/browse/PDFBOX-4669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17003542#comment-17003542
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Maruan Sahyoun commented on PDFBOX-4669:
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in addition - writing to PDF for the 3 same annotations they share the same
indirect object reference - \{{4 0 R}} in my case.
Possible fixes
* add \{{equals}} to PDAnnotation where two annotations are equal if the
COSObject is equal
* additionally we could also look in adding the same objects to the list of
they share the same COSObject for getAnnotation
The first one is a must have IMHO - the second an added benefit.
> Ensure proper functionality of COSArrayList
> -------------------------------------------
>
> Key: PDFBOX-4669
> URL: https://issues.apache.org/jira/browse/PDFBOX-4669
> Project: PDFBox
> Issue Type: Sub-task
> Components: PDModel
> Affects Versions: 2.0.17, 3.0.0 PDFBox
> Reporter: Maruan Sahyoun
> Assignee: Maruan Sahyoun
> Priority: Major
>
> The current COSArrayList implementation has some glitches as pointed out at
> https://stackoverflow.com/questions/45812696/
> In addition when working with {{AnnotationFilter}} as the
> adding/update/removal is index based the wron index of the underlying
> {{COSArray}} is affected.
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