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From "Tilman Hausherr (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PDFBOX-2477) NPE in DomXmpParser.createProperty
Date Mon, 03 Nov 2014 18:58:35 GMT
Tilman Hausherr created PDFBOX-2477:
---------------------------------------

             Summary: NPE in DomXmpParser.createProperty
                 Key: PDFBOX-2477
                 URL: https://issues.apache.org/jira/browse/PDFBOX-2477
             Project: PDFBox
          Issue Type: Bug
          Components: XmpBox
    Affects Versions: 1.8.7, 1.8.8, 2.0.0
            Reporter: Tilman Hausherr
            Assignee: Tilman Hausherr
             Fix For: 1.8.8, 2.0.0


I get this NPE with the attached file:
{code}
Exception in thread "main" java.lang.NullPointerException
	at org.apache.xmpbox.xml.DomXmpParser.createProperty(DomXmpParser.java:352)
	at org.apache.xmpbox.xml.DomXmpParser.parseDescriptionRoot(DomXmpParser.java:292)
	at org.apache.xmpbox.xml.DomXmpParser.parse(DomXmpParser.java:206)
	at org.apache.xmpbox.xml.DomXmpParser.parse(DomXmpParser.java:114)
	at org.apache.pdfbox.preflight.process.MetadataValidationProcess.validate(MetadataValidationProcess.java:67)
	at org.apache.pdfbox.preflight.utils.ContextHelper.callValidation(ContextHelper.java:73)
	at org.apache.pdfbox.preflight.utils.ContextHelper.validateElement(ContextHelper.java:88)
	at org.apache.pdfbox.preflight.PreflightDocument.validate(PreflightDocument.java:168)
	at org.apache.pdfbox.preflight.Validator_A1b.runSimple(Validator_A1b.java:161)
	at org.apache.pdfbox.preflight.Validator_A1b.main(Validator_A1b.java:126)
{code}
The cause is this:
{code}
<xapMM:DerivedFrom rdf:parseType="Resource"/>
{code}

According to the XMP spec, that part can have missing elements, i.e. it is not an error. So
I'll just add a null check.

There are more potiential NPE risks in that code, however I prefer to get examples.



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