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https://issues.apache.org/jira/browse/PDFBOX-4767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr resolved PDFBOX-4767.
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Resolution: Fixed
> getFilters() methods should return an empty list instead of null when possible
> ------------------------------------------------------------------------------
>
> Key: PDFBOX-4767
> URL: https://issues.apache.org/jira/browse/PDFBOX-4767
> Project: PDFBox
> Issue Type: Improvement
> Components: PDModel
> Affects Versions: 2.0.18
> Reporter: Tilman Hausherr
> Assignee: Tilman Hausherr
> Priority: Minor
> Fix For: 3.0.0 PDFBox
>
>
> "Clean code" teaches to favor returning an empty lists instead of null.
> This is a breaking change because some may check for null to confirm the lack
> of a filter key. Preflight does this in
> {{MetadataValidationProcess.getXpacket()}}.
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