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From "Frank Scholten (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAHOUT-410) NPE when calling hasPreferenceValues or getPreferenceValues on newly created FileDataModel
Date Mon, 07 Jun 2010 15:09:55 GMT
NPE when calling hasPreferenceValues or getPreferenceValues on newly created FileDataModel
 
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                 Key: MAHOUT-410
                 URL: https://issues.apache.org/jira/browse/MAHOUT-410
             Project: Mahout
          Issue Type: Bug
          Components: Collaborative Filtering
    Affects Versions: 0.3
            Reporter: Frank Scholten
            Priority: Trivial


An NPE gets thrown when calling hasPreferenceValues() or getPreferenceValue(long userID, long
itemID) on a newly created FileDataModel. This happens because these methods do not call checkLoaded()
before forwarding the method call to the delegate. Other overridden methods do call checkLoaded().
Seems like a bug.

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