Re: Modifying projects in Java

From: Andrus Adamchik (andru..bjectstyle.org)
Date: Mon Jul 16 2007 - 02:44:16 EDT

  • Next message: Andrus Adamchik: "Re: ConfigurationException"

    On Jul 16, 2007, at 1:22 AM, Mikaël Cluseau wrote:

    > Hi Andrus, and thanks for your answer.
    >
    > Le samedi 14 juillet 2007 à 22:13 +0300, Andrus Adamchik a écrit :
    >> To work around a bad decision made a long time ago to use Cayenne
    >> runtime objects (DataDomain, DataNode) as CayenneModeler model beans,
    >> modeler often uses inner subclasses to suppress various runtime
    >> behavior aspects.
    >
    > This design decision is something I liked, and is one of the reasons
    > that made me choose Cayenne: it allows for coded-style project
    > transformation, which is very interesting when it come to batch
    > processing. I'm using it to convert client's conventions to an
    > coherent
    > objet model, instead of mapping tables one by one using the modeler
    > (you
    > guessed it, I'm not a GUI person ;-)).

    Ah, glad somebody finds it useful :-)

    > I think that the only problem with the current design is that it is
    > reversed: you extends run-time objects to modeler objets (ie
    > Configuration vs ProjectConfiguration). I *feel* it would be much
    > better
    > to use a descriptive model suitable for the modeler and *then* to
    > extend
    > the run-time model to it, using a kind of "meta-model" interface:
    >
    > // Loads the (meta-)model
    > Configuration config = new Configuration("cayenne.xml");
    > // Build a run-time model
    > RuntimeConfiguration rtc = config.instanciate();
    > // Get back the (meta-)model
    > assert config == rtc.getMetaModel();
    >
    > I'm very tight on my deadlines theses days but I would be happy to
    > help
    > you get rid of this "pain" (you seem to call it this way ;-)) in a
    > month
    > or two.

    Great! Let's discuss it once you have spare cycles.

    Andrus



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