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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 51836] New: NullPointerException when navigation target doesn't exist
Date Fri, 16 Sep 2011 14:05:10 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=51836

             Bug #: 51836
           Summary: NullPointerException when navigation target doesn't
                    exist
           Product: Fop
           Version: 1.0
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: trivial
          Priority: P2
         Component: general
        AssignedTo: fop-dev@xmlgraphics.apache.org
        ReportedBy: melanie.drake@gmail.com
    Classification: Unclassified


Created attachment 27512
  --> https://issues.apache.org/bugzilla/attachment.cgi?id=27512
IF file after modification

A NullPointerException was encountered when trying to generate a PDF from a
modified FOP IF file.  The IF file was systematically manipulated to delete
some of the <page-sequence> and <page> elements.  The exception was the result
of <nav:*> elements that reference content that no longer exists in the IF
file.  Stripping all <nav:*> elements from the IF file avoids the exception. 
There may be a more graceful way of handling this than a NullPointerException.  

The specific error I get when trying to generate the PDF is: 
Caused by: java.lang.NullPointerException 
at
org.apache.fop.render.pdf.PDFDocumentNavigationHandler.updateTargetLocation(PDFDocumentNavigationHandler.java:188)

at
org.apache.fop.render.pdf.PDFDocumentNavigationHandler.getAction(PDFDocumentNavigationHandler.java:160)

at
org.apache.fop.render.pdf.PDFDocumentNavigationHandler.renderLink(PDFDocumentNavigationHandler.java:108)

at
org.apache.fop.render.intermediate.extensions.DocumentNavigationHandler.endElement(DocumentNavigationHandler.java:186)

[rest of stack omitted] 

I believe the NullPointerException occurs on this line in
PDFDocumentNavigationHandler.java: 
  action.getTargetLocation().x / 1000.0

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