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https://issues.apache.org/jira/browse/PDFBOX-581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12788088#action_12788088
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Andreas Lehmkühler commented on PDFBOX-581:
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IMHO the Ignore-operator is a good idea. As the TextStripper has its own
property file to define the operator mapping, we should use the ignore-operator
in that case and leave the PageDrawer property file alone. I think it's quite
useful to know which unsupported operators are used during rendering a pdf. So
that it's easy to decide if something is missing because of an issue or because
of beeing not supported.
> Avoid warnings for graphics operations when extracting text
> -----------------------------------------------------------
>
> Key: PDFBOX-581
> URL: https://issues.apache.org/jira/browse/PDFBOX-581
> Project: PDFBox
> Issue Type: Improvement
> Components: Text extraction
> Reporter: Jukka Zitting
> Assignee: Jukka Zitting
> Priority: Minor
>
> PDFStreamEngine logs warnings of all encountered PDF operators for which an
> OperatorProcessor has not explicitly been configured. This is a bit annoying
> for things like text extraction where many graphics operators can simply be
> ignored.
> To solve this we can either disable the warnings entirely or add an explicit
> "Ignore" operator processor that simply ignores the selected operators. I'm
> inclined to implement the latter solution as I think it's a good idea to log
> warnings for truly unexpected operators.
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