Hi,
This is a new area for me ( but exciting! ).
I'm experimenting with using drools for filtering datasets.
In my case so far, I have basically 4 rules with varying parameters.
One of the rules looks something like this:
loop over a collection of beans
- for each bean check it against the conditions.
The conditions are name/value pairs with an operation ( >, <, =, etc...)
Each name may have several values that are ORed together.
So for example: return true IF name=1 OR 2 OR 3 ... etc.
Also, each rule may have more than one name/value pair.
And if the number of name/value pairs > 1 then AND them together
Example:
nameX=1 OR 2 OR 3
AND
nameY= A OR B OR etc...
Since the variable data is coming from a database and I've narrowed it down
to 4 rules, I figured that the best approach would be to program (using the
spi ) the rules rather than XML.
Can anyone give me a pointer or suggestion on how I can express the above
using drools, especially the operators?
Also, IS there an advantage to using drools in this case vs. a home grown
system? I initially started down the latter route, but it seems that the
further I went I was just re-inventing the wheel ( and doing quite poorly! )
I would really appreciated any help.
Thanks!
Dave
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