🚀 go-pugleaf

Hi Andrew,

"Andrew Shrosbree" <A.Shrosbree@ballarat.edu.au> schrieb im Newsbeitrag
news:3AE67517.5B43766@ballarat.edu.au...
> Greetings
>
> I have an application which uses 4 separate factories. Each factory is a
> singleton which maintains a hashtable of classes. I can ask each factory
to
> return a particular instantiated class by calling (for example)
>
> jMyObject oObject = jFactory1.getObjectFor( "ClassName" );
>
> As you can see, my getObjectFor method is static. In fact all the methods
in my
> factory classes are static.

If you would have used the naming convention that class names have to start
with
an uppercase letter we could have seen.

> Now all the factories work exactly the same, so I want to subclass them
all from
> a neat base-factory class. But of course, I can't do this because the
Instance
> method in each of my classes returns a different type.
>
> I have grappled with Rod Waldhoff's article 'Implementing the Singleton
Pattern
> in Java' and cannot make head of tail of how to solve my subclassing
problem.
>
> Does anybody have some real code which demonstrates a solution to this
(common)
> problem?

You can make your methods return type an Object and cast the returned
reference
to the just desired type.

Greetings
Michael

>
> --
> Andrew N. Shrosbree
> Project Manager and Technical Architect
> Collaborative Centre for eHealth
> University of Ballarat
> Victoria, Australia
> Tel: +61 (0)3 5327 9896
> Fax: +61 (0)3 5327 9307
> Mob: +61 (0)415 645 291
>
>