Re: JMIUNDO SPI 0.2

On Fri, Jun 28, 2002 at 12:53:27PM -0500, Brian Smith wrote:
> My understanding is that all datatypes, including CollectionType 
> instances, are immutable.

>From where did you take this understanding ? My sources are:

JMI p.40: Unless otherwise specified, Java collections that appear in
the generated and reflective APIs have live semantics as opposed to
copy semantics. ... the source collection can be updated using:
* Operations defined in the Java collection interface.

JMI p. 74: CollectionType Template: All CollectionTypes are mapped to
java.util.Collection or java.util.List.

Please point me to my misunderstanding, if there is any.

For the moment I won't argue on the other point brought up by you,
because if you're right in this point, then I will agree with you in
the other point, too. It would really heavily simplify the JMIUNDO SPI
and I would be glad about this. Then it would be the nice SPI I wanted
to have. On the other hand interactive applications would have to add a
layer on top of the meta-data repository to allow the user to modify
attribute values.

> Do any JMI implementations allow you to modify the StructureField
> values?

Yes, every open source JMI implementation after a few code changes ;-)

-- 
Holger Krug
[email protected]