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https://issues.apache.org/jira/browse/PDFBOX-2951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14727982#comment-14727982
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John Hewson commented on PDFBOX-2951:
-------------------------------------
This fixes the NullPointerException, which was due to Encoding having a stale
cache of glyph names which didn't account for the Differences. Now instead of
an NPE you should get an IOException because the given characters aren't
available in the font, because you're not decoding the text correctly, as
discussed above.
> quotedbl causes NullPointerException
> ------------------------------------
>
> Key: PDFBOX-2951
> URL: https://issues.apache.org/jira/browse/PDFBOX-2951
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 2.0.0
> Environment: Windows 10 64 bit
> Reporter: Juergen Uhl
> Fix For: 2.0.0
>
> Attachments: Test.jar, Test.java, Test.pdf
>
>
> I have a pdf document using (besides others) the font CourierNewPS-BoldMT and
> text with this font containing a double quote.
> When calling PDFont.encode, this results in a NullPointerException due to the
> following:
> The font encoding is built using pdf /DIFFERENCES which overwrites the
> original "quotedbl" at index 34 with an "A". The entries for
> quotedblbase/left/right are left unchanged. As a result, the inverted font
> does not contain "quotedbl" as key.
> Within encode, the character code 34 gets assigned the name "quotedbl", which
> is then not found in the inverse encoding (PDTrueTypeFont.encode -> int code
> = inverted.get(name))
> Right before this code line causing the NullPointerException, there is a
> check whether ttf.hasGlyph("quotedbl") (which in this case is false) and, if
> not, whether ttf.hasGlyph("uni0022") (which in this case is true); however,
> this has no consequence for the continuation of the code, which then crashes,
> since inverted.get("quotedbl") is null (which is assigned to an int).
> I believe, this is a bug in PDFBox, but have no idea, whether the handling
> within encode should be changed (maybe using the "else" part in case
> ttf.hasGlyph("quotedbl") is false or whether code 34 should be assigned to
> quotedblbase in the first place, or even something else.
> I attached the file (Test.pdf) where the error occurs and a jar (main is
> com.juergisApps.pdfConverter.Test) that reproduces the problem.
> You may also see
> http://stackoverflow.com/questions/7140476/pdf-font-mapping-error
> Juergen
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