RE: Cayenne GUI tool

From: Andrei Adamchik (aadamchi..obox.com)
Date: Mon Feb 11 2002 - 12:31:30 EST

  • Next message: Shengaout, Michael: "RE: Cayenne GUI tool"

    You forgot to send it to the mailing list again ;-)

    I think source and target are redundant, since it is derived data. I
    totally agree that DbRelationship name won't be unique across the DataMap,
    just within the source entity. But still, here is how you would find the
    right DbRel. without source and target under "db-relationship-ref" tag:

    // with a couple of casts omitted here
    DbRelationship r1 =
    objRel.getSourceEntity().getDbEntity().getRelationship(name1);
    DbRelationship r2 = r1.getTargetEntity().getRelationship(name2);
    DbRelationship r3 = r2.getTargetEntity().getRelationship(name3);
    // ... etc.

    At 12:21 PM 2/11/2002 -0500, Shengaout, Michael wrote:
    >No, I meant something slightly different. The DbRelationship Name won't be
    >unique across the DataMap. It will be unique for the DbRelationships between
    >two specified DbEntities (e.g A and B). It is going to be needed only when
    >you have more than one relationship between two entities, or when you have
    >the relationship between of entity with itself, e.g. subordinate-supervisor
    >relationship in DbEntity "Employee". Consequently, db-relationship-ref will
    >have to have
    >a) Source
    >b) Target
    >c) Name
    >
    >All three will be mandatory, but Name will not be unique across the DataMap.
    >
    >Misha
    >
    >

    Andrei



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