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Class Person [was: Java EE Architecture]

From "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org>
Newsgroups comp.lang.java.programmer
References (4 earlier) <44SdnR1nzv406sPPnZ2dnUVZ_q2dnZ2d@westnet.com.au> <YPGdnVXVhNabFMPPnZ2dnUVZ7tKdnZ2d@bt.com> <525f31cc$0$297$14726298@news.sunsite.dk> <r7udnfKuf9XNBcLPnZ2dnUVZ7s-dnZ2d@bt.com> <7YidnRXyT-kfPcLPnZ2dnUVZ_qGdnZ2d@westnet.com.au>
Subject Class Person [was: Java EE Architecture]
Date 2013-10-18 08:19 +0100
Message-ID <WvWdneU6t9mRfP3PnZ2dnUVZ7rSdnZ2d@bt.com> (permalink)

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Qu0ll wrote:

> Let's face it, there are no "people" in the world.  The world is inhabited
> by citizens, residents, fish pies, accounts, users and lots and lots of
> animals.
>
> There is not one "person" on Earth!

Indeed, there are no "objects" either ;-)

Actually I thnk there's some truth to what Lipka claims.  In /most/ systems, 
either the s/w would be all /about/ people, in which case it's likely that 
"Person" would be at best an almost vacuous base class.  Or the system would 
not be about people particularly at all, in which case (as the the cat claims) 
it is likely that you'd want to represent your contacts with people with 
something less tied to the idea of a "person" like "account", "contact", or 
"customer" (all of which might be organisations rather than people, and also 
one "real" person might have more than one account, etc).

So I think that as a rule-of-thunb (not an absolute rule), "No class called 
Person" isn't so bad.  Class Person is a code smell -- not wrong in itself, but 
a useful hint that something /might/ be wrong.

    -- chris

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Thread

Java EE Architecture art.marole@gmail.com - 2013-10-09 13:41 -0700
  Re: Java EE Architecture Lew <lewbloch@gmail.com> - 2013-10-09 14:45 -0700
    Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-09 22:00 -0400
  Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-09 22:18 -0400
    Re: Java EE Architecture art.marole@gmail.com - 2013-10-10 00:47 -0700
      Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-16 20:37 -0400
  Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-10 13:26 +0100
    Re: Java EE Architecture 1connu <1connu999@gmail.com> - 2013-10-16 10:45 +0200
      Re: Java EE Architecture Donkey Hottie <donkey@fredriksson.dy.fi> - 2013-10-16 13:42 +0300
        Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-16 11:55 +0100
          Re: Java EE Architecture Donkey Hottie <donkey@fredriksson.dy.fi> - 2013-10-16 14:18 +0300
          Re: Java EE Architecture Donkey Hottie <donkey@fredriksson.dy.fi> - 2013-10-16 14:25 +0300
            Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-16 14:23 +0100
              Re: Java EE Architecture Donkey Hottie <donkey@fredriksson.dy.fi> - 2013-10-16 17:10 +0300
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-16 16:44 +0100
                Re: Java EE Architecture "L." <carisio@gmail.com> - 2013-10-16 10:15 -0700
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-16 19:01 +0100
                Re: Java EE Architecture "L." <carisio@gmail.com> - 2013-10-16 12:17 -0700
                Re: Java EE Architecture Martin Gregorie <martin@address-in-sig.invalid> - 2013-10-16 21:01 +0000
                Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-16 20:40 -0400
                Re: Java EE Architecture Donkey Hottie <donkey@fredriksson.dy.fi> - 2013-10-17 00:00 +0300
              Re: Java EE Architecture Wayne <nospam@all.invalid> - 2013-10-16 23:08 -0400
                Re: Java EE Architecture Donkey Hottie <donkey@fredriksson.dy.fi> - 2013-10-19 17:05 +0300
                Re: Java EE Architecture Lew <lewbloch@gmail.com> - 2013-10-19 14:48 -0700
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-20 09:00 +0100
                Re: Java EE Architecture "Qu0ll" <Qu0llSixFour@gmail.com> - 2013-10-20 19:40 +1100
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-20 10:07 +0100
          Re: Java EE Architecture Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-12-16 20:14 -0400
            Re: Java EE Architecture lipska the kat <"lipskathekat at yahoo dot co dot uk"> - 2013-12-17 08:47 +0000
        Re: Java EE Architecture Jeff Higgins <jeff@invalid.invalid> - 2013-10-16 20:19 -0400
          Re: Java EE Architecture Jeff Higgins <jeff@invalid.invalid> - 2013-10-16 21:24 -0400
      Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-16 11:49 +0100
        Re: Java EE Architecture "Qu0ll" <Qu0llSixFour@gmail.com> - 2013-10-16 22:24 +1100
          Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-16 13:39 +0100
            Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-16 20:39 -0400
              Re: Java EE Architecture "Qu0ll" <Qu0llSixFour@gmail.com> - 2013-10-17 13:43 +1100
              Re: Java EE Architecture Jeff Higgins <jeff@invalid.invalid> - 2013-10-16 23:22 -0400
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-17 08:53 +0100
              Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-17 08:57 +0100
                Re: Java EE Architecture "Qu0ll" <Qu0llSixFour@gmail.com> - 2013-10-17 19:31 +1100
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-17 09:56 +0100
                Re: Java EE Architecture "Qu0ll" <Qu0llSixFour@gmail.com> - 2013-10-17 20:18 +1100
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-17 10:56 +0100
                Re: Java EE Architecture "Qu0ll" <Qu0llSixFour@gmail.com> - 2013-10-17 21:39 +1100
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-17 12:08 +0100
                Class Person [was: Java EE Architecture] "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2013-10-18 08:19 +0100
                Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-17 21:00 -0400
                Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-17 21:02 -0400
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-18 09:06 +0100
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-18 09:04 +0100
                Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-19 22:43 -0400
                Re: Java EE Architecture lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-10-20 09:05 +0100
                Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-20 09:24 -0400
      Re: Java EE Architecture Arne Vajhøj <arne@vajhoej.dk> - 2013-10-16 20:43 -0400

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