By the way, traits are a quite clever solution to the problem of multiple inheritance, in which you can create a class that is composed of several traits, a trait being like an abstract class which is not allowed to have state (instance variables). It seems there is only an implementation for Smalltalk right now, and it is possible to emulate traits using AspectJ, but the syntax is not that nice.
Dennis Sosnoski wrote:
I'm not sure exactly what you mean by the "traits" approach. The <template> is basically a reusable binding definition structure that's defined with a particular object type. You should be able to define multiple <template>s for the same object type and combine them in a <mapping> or <structure>, but they'd be in a particular order (or unordered and optional). That's getting into some pretty wierd code generation, though, so no guarantees.
- Dennis
Guillaume Pothier wrote:
Right now there's no good way to share components of binding definitions (the label/using approach is fairly ugly, and probably still broken in some edge cases), so I think people end up using <mapping> more than they should. For beta 4 I'll be adding a <template> element to the binding definition to allow for reusable structures without the overhead of a <mapping> or the
Will the <template> element be similar to the "traits" approach, ie, a mapping can combine any number of templates? That would be real great!
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