Re: Hook in the cayenne internals

From: Michael Gentry (blacknex..mail.com)
Date: Mon Apr 02 2007 - 09:15:13 EDT

  • Next message: jerome moliere: "Re: Hook in the cayenne internals"

    I hate to follow up my own message, but I forgot to mention that the two
    main reasons implemented the extended types are:

    1) Better type safety. Methods could be setLienPosition(LienPosition
    lienPosition) instead of setLienPosition(Integer lienPosition). Only values
    that represented actual lien positions could be assigned, then.

    2) English (or any other language -- it was localizable) text for each
    enumerated value. Made it easier to present more meaningful values in
    pulldown lists and in reports instead of the typically more
    programmer-oriented values.

    /dev/mrg

    On 4/2/07, Michael Gentry <blacknex..mail.com> wrote:
    >
    > I've used extended types to implement enumerations (essentially -- but
    > mine had a lot more oomph behind it), but these were all integer/string
    > values, not blobs. My implementation of that is on the Cayenne Wiki, but I
    > wrote it for Java 1.4 and a co-worker had trouble with it working under
    > Java 1.5, but I haven't explored it yet. I'm not sure if it would help
    > you, but it might be worth looking at (since the code shows how to
    > read/write the types -- do the translation).
    >
    > /dev/mrg
    >
    > PS. Wiki link: http://cwiki.apache.org/CAY/enumerations-example.html
    >
    >
    > On 4/2/07, jerome moliere <jerome.molier..mail.com> wrote:
    > >
    > > Hi all,
    > > I'd like to show on a simple test the Cayenne equivalent for the
    > > Hibernate
    > > UserType, that is to say
    > > a way to map some SQL types with some user provided code...
    > > Example given is : my customers use sybase image type to store XML
    > > gzipped
    > > huge files...
    > > I'd like to be able to be able to store/read the XML
    > > transparently...Image
    > > type is a detail of implementation
    > > org.apache.cayenne.access.types.ExtendedType
    > > seems to be the Cayenne solution but there are no big details on this
    > > subject...
    > >
    > > Is the Cayenne source code my only source ?
    > > Moreover if you have UML sequence diagrams and other conception
    > > documents on
    > > Cayenne, I'd very happy to read them..
    > >
    > >
    > > Cheers
    > > Jerome
    > > --
    > > Jerome Moliere - Mentor/J
    > > http://romjethoughts.blogspot.com/
    > > auteur Eyrolles
    > >
    >
    >

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