[hibernate-issues] [Hibernate-JIRA] Created: (HHH-2250) Create an appropriate error message if Query.setEntity is passed a NULL value

[Jonas Maurus (JIRA)]

Create an appropriate error message if Query.setEntity is passed a NULL value
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         Key: HHH-2250
         URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2250
     Project: Hibernate3
        Type: Improvement

  Components: query-hql  
    Versions: 3.2.0.ga, 3.2.1    
    Reporter: Jonas Maurus
    Priority: Minor


setEntity(xyz, null) ends in a NPE in SessionImpl.guessEntityName(). This previously came up as HHH-675. I just spent hours tracking this NPE in our application, then upgrading Hibernate because I thought it might be a Hibernate bug :-/. The offending line read:

.setEntity("customer", user.getCustomer())

"user" being an entity managed by Hibernate with user.customer being a nullable ManyToOne-relation. The current mode of "crash-and-burn" really looks like a Hibernate bug and not like expected behavior. I'd like to recommend that setEntity() should explicitly check for null-values.

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