On Mon, Feb 23, 2009 at 9:38 PM, Anders Norås <[email protected]> wrote:
> I'm currently working on a demo for a talk where I'm using Qi4j to > illustrate how one can do protoype based development with Java. For > reference, I'm including a Ruby example of this taken from the talk; My Ruby knowledge == zero, so the code doesn't say me much... > Is there an easy way (not so easy ways are also fine :-) to achieve > this? We don't allow you to change the Mixins of composites on the fly. Every combination must be declared, either statically or at deploy-time (which we generally don't recommend). So the alternative behaviour would sit in a different 'type', potentially sharing everything except a Concern that constructs the fullname depending on (for instance) a internal mixin set at builder-time (use the stateFor() method with a e.g. FormatType type holding the formatting variants). So, I think the example is probably not a good showcase of dynamically changeable mixins, and we happen to think that there are very few showcases, and the downsides will quickly negate the benefits of a non-static system. Mind you, you can theoretically have a JRuby script implementing your Qi4j mixin, and modify the script on the fly for a different behavior if you want to get really sassy about it. Self-modifying code is definitely beyond our recommendations. While you are at it, put a couple of Mixins together in the same Composite, each implemented in different language; Groovy, JavaScript, Beanshell and Ruby. (Lacking Skala!) Cheers Niclas -- http://www.qi4j.org - New Energy for Java _______________________________________________ qi4j-dev mailing list [email protected] http://lists.ops4j.org/mailman/listinfo/qi4j-dev
