[Advice needed] where to associate child objects with Parent

alistair · **Posted:** Sun Mar 07, 2004 11:14 pm

Vital stats: Hibernate 2.1.2.

A parent class, Foo, has a one to many relationship with child class, Bar.

Which of this design is better and why ?

#1) The client program performs the association task.

e.g. In the web tier

Code:

    Foo f = new Foo();
    Bar b1 = new Bar();
    Bar b2 = new Bar();

     f.addBar( b1 ); f.addBar( b2 );
     delegate.createFoo( f );

#2) the SLSB (session bean) performs the association

Code:

    Foo f = new Foo();
    Bar b1 = new Bar();
    Bar b2 = new Bar();

    delegate.createFoo( f );
    delegate.addBarToFoo( f, b1 );
    delegate.addBarToFoo( f, b2 );

Thanks a million.

Regards,

Alistair

roofimon · **Posted:** Sun Mar 07, 2004 11:34 pm

I prefer the first one :-)

Cheers

alistair · **Posted:** Mon Mar 08, 2004 12:22 am

Why is the first design preferable ?

Regards,

Alistair

emmanuel · **Posted:** Mon Mar 08, 2004 8:41 am

More OO, less SLSB usage, transaction isolation

roofimon · **Posted:** Tue Mar 09, 2004 2:41 am

Lets delegate obj do the things that it supposes to do , Make sense for me and easy to understand, anyway this is my personal opinion.
Cheers
roofimon