Hi everyone,
To get used to Jess, I have been executing commands at the Jess
prompt, and then trying the same commands using the API.
After doing all the usual things (new rete engine, creating a
deftemplate, populating the slots and adding the template) everything
works fine when asserting a particular fact using executeCommand - and
my rule fires. However, when I try and assert the fact using the API
(same slot values, head name etc.), the rule does not fire.
This code works:
engine.executeCommand("(assert (conventionalAddress (number_prefix
NIL) (street_number 48) (street_name Marlow) (street_type Street)
(suburb_name Wembley) (city_name Perth) (state_name WA) (post_code
6014) ))");
but the API equivalent does not:
Fact f = new Fact("conventionalAddress", engine);
f.setSlotValue("number_prefix", new Value("", RU.STRING) );
f.setSlotValue("street_number", new Value("48", RU.STRING) );
f.setSlotValue("street_name", new Value("Marlow", RU.STRING) );
f.setSlotValue("street_type", new Value("Street", RU.STRING) );
f.setSlotValue("suburb_name", new Value("Wembley", RU.STRING) );
f.setSlotValue("city_name", new Value("Perth", RU.STRING) );
f.setSlotValue("state_name", new Value("WA", RU.STRING) );
f.setSlotValue("post_code", new Value("6014", RU.STRING) );
engine.assertFact(f);
Regardless of which is used, this is the rule I'm trying to fire:
engine.executeCommand("(defrule find-suburb (conventionalAddress
(post_code 6014) (suburb_name ?s) ) => (store RESULT ?s ) )");
I just can't see how the fact is any different when done via the API!
Thanks, and I hope I haven't been posting the mailing list too much. (!)
Best wishes,
Matt
--
Matthew Hutchinson
Ph.D. Candidate
Department of Spatial Sciences
Curtin University of Technology
GPO Box U1987
Perth, Western Australia 6845
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