Adding an Immutable annotation

[Marco Tedone]

Hi all,

I know it's not "officially" a pattern, but why don't we add an
@Immutable annotation, to identify an Immutable class, according to
Item 15 of EJ 2nd Edition?

I'm writing a Twitter services API and would make good use of such
annotation.

Regards,

Marco

[Michael Hunger]

So, it is rather an idiom.

Sounds good anyway. Perhaps also add some more of the EJ things? Like Constant Object (== Enum).

Cheers

Michael

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[Marco Tedone]

Yep, I was thinking along the same line. Things like Builder, etc. Shall I
create a package called org.jpatterns.ej (with subpackages, such as
immutable, builder, etc)?

If ok pls let me know and I'll add it.

Regards,

Marco

[Dr Heinz M. Kabutz]

Hi Marco,

I don't think this is a pattern and I also don't think it belongs in org.jpatterns.  Besides there already is an Immutable annotation in Hibernate AND in the concurrency annotations.

http://groups.google.com/group/jsr-305/browse_thread/thread/fac3b88874aa8b89?pli=1

Probably a lot more places have this.

Regards

Heinz
-- 
Dr Heinz M. Kabutz (PhD CompSci)
Author of "The Java(tm) Specialists' Newsletter"
Sun Java Champion
IEEE Certified Software Development Professional
http://www.javaspecialists.eu
Tel: +30 69 72 850 460
Skype: kabutz 

[Johannes Buehler]

I would also not introduce @Immutable. But maybe a @TransferObject matches the pattern you would like to express here.

regards

Johannes

[Dr Heinz M. Kabutz]

Right, and that is a recognizable JEE pattern.

Regards

Heinz
-- 
Dr Heinz M. Kabutz (PhD CompSci)
Author of "The Java(tm) Specialists' Newsletter"
Sun Java Champion
IEEE Certified Software Development Professional
http://www.javaspecialists.eu
Tel: +30 69 72 850 460
Skype: kabutz