Re: [rules-users] Does the Rete Graph recognize associations independently?
The engine has no way to know that one object is a field of another
object. For this reason you should setup things relationally, using an
object to relate the parent and child. Look at the Conways game of life
example and the Neighbor class. You also then have the advantage that
you can now exploit the cross product to drive the application.
Read this blog:
http://blog.athico.com/2007/06/declarative-relational-programming.html
Mark
Arjun Dhar wrote:
Hi,
one doubt I've had while writing DRL scripts and also with others is:
A {
B b
C c
D d
};
If The rules are to be Written over A, B, C
Then should one assert B, C & D also? ---> Answer yes!
Ok, now that we've asserted them, in the Rule if one uses:
A.b; does the Rete graph recognize it as a node of A or B?
I suspect it is 'A'
Hence...
I take a safe approach and write rules on B,C independently but then ensure
those objects are reverse associated with A. This increases the risk of objects
not being released for GC (depends on JVM) if not nullified (and breaking the
circular associations).
So whats the best approach in designing objects for the Engine?
Thanks,
Arjun
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