RE: Re: Computed Attributes

From: Jürgen Saar (Juerge..Saar.org)
Date: Fri Feb 17 2006 - 02:42:32 EST

  • Next message: Andrus Adamchik: "Re: Computed Attributes"

    Yes ist does cover most unusually need,
    but there a 2 additional aspects:

    -- 1 --
    For generation tasks, like velocity, it would be helpful
    if they can be controlled by repository

    -- 2 --
    In the team it brings more transparency for
    the Datastructure

    And I think it should be easy to ignore the
    transient attributes on all db activities
    within the cayenne engine.

    2006/2/16, Joshua Pyle <joshua.t.pyl..mail.com>
    >
    > Maybe I'm over simplifying but if I need an attribute on a cayenne
    > object I just create the appropriate getter and perform whatever calcs
    > needed in that getter. In the example I provide I'm just formatting a
    > date but I could also run another query loop through the results and
    > spit out a sum. I could even execute a SQLTemplate query.
    >
    > public class User extends _User{
    > public String getEntryDateString{
    > Date toFormat = this.getEntryDate();
    > if( toFormat == null ){
    > return "";
    > }else{
    > return Util.SIMPLE_DATE.format( toFormat );
    > }
    > }
    >
    > public Double getComplexThingy{
    > Double toReturn = new Double(0.0);
    > // TODO loop through a List of object and perform a complex calculation
    > return toReturn;
    > }
    > }
    >
    > I have yet to find a situation where this does not cover even my most
    > unusually needs.
    >
    > Joshua T. Pyle
    >

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