NPE in epubcheck when the rootfile/@full-path is missing

PROBLEM:

Give a brief description of the problem
When epubcheck is used to verify an epub file that has a container.xml that 
does not specify the full-path attribute for the rootfile element then along 
with the error that reports the issue epubcheck fails with a 
NullPointerException.

METHOD:

What steps will reproduce the problem?
1. Create an epub sample and remove the full-path attribute from the rootfile 
element in the container.xml file
2. Check that epub with epubcheck
3. You should obtain something like below:

$ java -jar dist/epubcheck-1.1.jar testdocs/noFullPath.epub 
Epubcheck Version 1.1

ERROR: testdocs/noFullPath.epub/META-INF/container.xml(4): element "rootfile" 
missing required attribute "full-path"
Exception in thread "main" java.lang.NullPointerException: name
    at java.util.zip.ZipFile.getEntry(ZipFile.java:144)
    at com.adobe.epubcheck.ocf.OCFPackage.hasEntry(OCFPackage.java:35)
    at com.adobe.epubcheck.opf.OPFChecker.runChecks(OPFChecker.java:81)
    at com.adobe.epubcheck.ocf.OCFChecker.runChecks(OCFChecker.java:97)
    at com.adobe.epubcheck.api.EpubCheck.validate(EpubCheck.java:143)
    at com.adobe.epubcheck.tool.Checker.main(Checker.java:48)

RESULT:

epubcheck fails with a NPE.

EXPECTED:

epubcheck should not crash with a NPE, it should check for no full-path.

PLATFORM:

Latest epubcheck from trunk.
Any operating system.

Original issue reported on code.google.com by georgebina76 on 16 Feb 2011 at 10:11

daniel782 / epubcheck

NPE in epubcheck when the rootfile/@full-path is missing #95