CODEWITHSUNDEEP
jess
zjsea
zjsea

Reputation: 3

A deftemplate code in Jess programing

I saw such code in a paper:

(import com.psy.entity.Record)

Can this statement import a Java class?

(deftemplate Record(declare(from-class Record)))

I don't understand this statement, how to use the declare statement, is there a function in Jess named from-class, I think I have never seen such function in the book of Jess in Action.

(defrule show-test-result-20
?0<-(Record {score<=30}))

I think it's better to do this test by the test conditional element, is this code right?

Upvotes: 0

Views: 155

Answers (1)

laune
laune

Reputation: 31290

"Can...class?" -> Yes, that's why you have the import statement. See the Jess manual.

(deftemplate Record (declare (from-class Record)))

This declares a fact type Record as a shadow fact for class `Record*. This is discussed and explained in the Jess manual.

"I think...?" -> No, the rule is perfectly all right and preferable.

Upvotes: 1

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