April 27, 2006

Some more hibernate thingies

Writing about web page http://hibernate.org

Some more hibernate observations, although I haven't got time to prove via unit tests:

– if you specify an interface="" then the laziness is ignored; it is always lazy (not documented AFAICS)

– if you have final methods/class then regardless of access (field|property) you will get null values. This is because CGLIB cannot subclass/override final classes/methods (well known), but why doesn't hibernate throw an exception?

– if you specify non-lazy for a class, then the class is fully formed, even if it is using CGLIB with final classes/methods irrespective of access (property|field). I suspect in this case CGLIB isn't involved and hibernate is simply instantiating your implementation class and updating the fields via reflection.

– if you specify an outer join in the mapping, laziness will be ignored; it won't be lazy. This of course is intuitive; join makes no sense if it is not lazy.

When I have more time I will unit test all these combinations, but this is a reminder to me do so.

Will I ever understand hibernate completely :)


- 4 comments by 2 or more people Not publicly viewable

  1. Phil Wilson

    No one will ever understand all of Hibernate completely, that's part of its magic :)

    05 May 2006, 10:45

  2. :)

    05 May 2006, 11:02

  3. Nick Howes

    We've just been having a terrible time of getting SiteImpl objects with null properties; should have remembered your blog entry sooner! Bloody Hibernate.

    21 Aug 2006, 12:04

  4. Deepak Kumar

    HI,

    Visit: http://www.roseindia.net/struts/hibernate-spring/index.shtml

    This tutorial shows how to develop User Registration and Login Application using Spring, Hibernate and Spring technologies.

    Regards
    Deepak Kumar

    19 Nov 2006, 16:31


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