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https://issues.apache.org/jira/browse/PDFBOX-5118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17297132#comment-17297132
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Tilman Hausherr commented on PDFBOX-5118:
-----------------------------------------
It looks to me as if you're trying to force your way to do something that isn't
meant to be done at all, by doing {{c.setAccessible(true)}}.
The NPE you get is here:
{{if (!getRenderer().isGroupEnabled(group))}}
So renderer hasn't been set. That one is to be set in the PageDrawerParameters.
You're also using an outdated version (but my comment stands).
> Can render PDF with PDFRenderer but not with PageRenderer
> ---------------------------------------------------------
>
> Key: PDFBOX-5118
> URL: https://issues.apache.org/jira/browse/PDFBOX-5118
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.20
> Reporter: Daniel Migowski
> Priority: Major
> Attachments: SimplePDFPageRenderer.java, SimplePDFRenderer.java
>
>
> I get the following NPE when I try to renderer a PDF with the PageRenderer
> (See SimplePDFPageRenderer.java) but it works when I use PDFRenderer (See
> SimplePDFRenderer.java). The Exception is:
> {{Exception in thread "main" java.lang.NullPointerExceptionException in
> thread "main" java.lang.NullPointerException at
> org.apache.pdfbox.rendering.PageDrawer.isHiddenOCG(PageDrawer.java:1907) at
> org.apache.pdfbox.rendering.PageDrawer.beginMarkedContentSequence(PageDrawer.java:1876)
> at
> org.apache.pdfbox.contentstream.operator.markedcontent.BeginMarkedContentSequenceWithProperties.process(BeginMarkedContentSequenceWithProperties.java:52)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:932)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:510)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:484)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:156)
> at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:271) at
> de.ikoffice.pdf.SimplePDFPageRenderer.main(SimplePDFPageRenderer.java:62)}}
> The PDF can be found at:
> [https://www.ikoffice.de/temp/DaumeBriefpapierDefekt.pdf]
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