RE: Adding own ordering algorithm

From: Scott Anderson (sanderso..irvana.com)
Date: Fri Nov 21 2008 - 14:42:59 EST

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    If you google for a comparator for version numbers/SNMP OIDs, you can
    find Java classes to do this. If you're guaranteed to always have
    exactly three fields, the slickest way would be to change the schema.

    Regards,
    Scott

    -----Original Message-----
    From: Adrian Wiesmann [mailto:awiesman..omap.org]
    Sent: Sunday, November 16, 2008 12:31 PM
    To: use..ayenne.apache.org
    Subject: Adding own ordering algorithm

    Hello all

    I have a field in a DataObject which I need for ordering and which is
    formatted like this:

    <number>.<number>.<number>

    When ordering with the default Java order mechanism this problem arises.
    The numbers are ordered like that (which is wrong in this context):

    10.10.10
    10.4.10
    10.9.10

    So I need to write my own comparator. Has anybody done so with Cayenne
    before and what would you declare as the best/cleanest solution to do
    so?
    Subclassing Ordering, extending the compare method and use that new
    class?

    Thanks for your comments.

    Cheers,
    Adrian

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