DO NOT REPLY [Bug 33924] New: - Anakia throws NullPointerException if run under Maven with Custom Contexts

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http://issues.apache.org/bugzilla/show_bug.cgi?id=33924

           Summary: Anakia throws NullPointerException if run under Maven
                    with Custom Contexts
           Product: Velocity
           Version: 1.5
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: Anakia
        AssignedTo: velocity-dev@jakarta.apache.org
        ReportedBy: hps@intermeta.de


The AnakiaTask has the feature to use a custom context object. This is tested in
the AnakiaTestCase. However, when running this test (and the AnakiaTask) under
Maven, it fails with a NullPointerException. The reason is that maven uses a
different sequence to initialize the AnakiaTask and Context objects and set
their properties. When running under ant, the setFile() method in the Context
object is called after setBaseDir() in the AnakiaTask, which allows setFile() to
resolve the baseDir member. When running under maven, setBasedir() is called
after the Context  object has been initialized thus using a null baseDir element
when creating the contextFile element in Context. 

When using an element outside the current working directory, this leads to
subContext.getContextDocument() returning null in line 378, thus resulting in a
NullPointerException.

The attached patch adds checks for this condition and throws a BuildExeption. It
also defers the creation of the contextDoc member of the context until it is
actually referenced.

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