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https://issues.apache.org/jira/browse/PDFBOX-3051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14972568#comment-14972568
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ASF subversion and git services commented on PDFBOX-3051:
---------------------------------------------------------
Commit 1710338 from [~tilman] in branch 'pdfbox/trunk'
[ https://svn.apache.org/r1710338 ]
PDFBOX-3051: convert indirect reference to COSNull to null
> COSArray.getObject() incorrect handling of indirect reference to COSNull
> ------------------------------------------------------------------------
>
> Key: PDFBOX-3051
> URL: https://issues.apache.org/jira/browse/PDFBOX-3051
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 1.8.10, 1.8.11, 2.0.0
> Reporter: Tilman Hausherr
> Assignee: Tilman Hausherr
> Fix For: 1.8.11, 2.0.0
>
> Attachments: EIMKRH5MJJPH3VHKE753U4VCLH64EOL2.pdf
>
>
> The attached (broken) file has this exception when displaying page 10:
> {code}
> java.lang.RuntimeException: java.util.concurrent.ExecutionException:
> java.io.IOException: Error: Unknown annotation type COSNull{}
>
> org.apache.pdfbox.debugger.pagepane.PagePane$RenderWorker.done(PagePane.java:175)
> sun.swing.AccumulativeRunnable.run(Unknown Source)
> java.security.AccessController.doPrivileged(Native Method)
> java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
> Caused by: java.util.concurrent.ExecutionException: java.io.IOException:
> Error: Unknown annotation type COSNull{}
>
> org.apache.pdfbox.debugger.pagepane.PagePane$RenderWorker.done(PagePane.java:164)
> sun.swing.AccumulativeRunnable.run(Unknown Source)
> java.security.AccessController.doPrivileged(Native Method)
> java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
> Caused by: java.io.IOException: Error: Unknown annotation type COSNull{}
>
> org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotation.createAnnotation(PDAnnotation.java:164)
> org.apache.pdfbox.pdmodel.PDPage.getAnnotations(PDPage.java:664)
> org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:181)
> org.apache.pdfbox.rendering.PDFRenderer.renderPage(PDFRenderer.java:208)
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:139)
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:68)
>
> org.apache.pdfbox.debugger.pagepane.PagePane$RenderWorker.doInBackground(PagePane.java:155)
>
> org.apache.pdfbox.debugger.pagepane.PagePane$RenderWorker.doInBackground(PagePane.java:138)
> java.lang.Thread.run(Unknown Source)
> {code}
> The cause is this code:
> {code}
> public COSBase getObject( int index )
> {
> Object obj = objects.get( index );
> if( obj instanceof COSObject )
> {
> obj = ((COSObject)obj).getObject();
> }
> else if( obj instanceof COSNull )
> {
> obj = null;
> }
> return (COSBase)obj;
> }
> {code}
> i.e. a COSObject that points to a COSNull object isn't returned as null, but
> as COSNull. COSDictionary.getDictionaryObject() does not have this bug.
> Solution: remove the "else".
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