[jboss-jira] [JBoss JIRA] (DROOLS-2486) Drools Runtime does not recognize Custom Operator Parameter

[bharath mogali (JIRA)]

bharath mogali created DROOLS-2486:
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             Summary: Drools Runtime does not recognize Custom Operator Parameter
                 Key: DROOLS-2486
                 URL: https://issues.jboss.org/browse/DROOLS-2486
             Project: Drools
          Issue Type: Feature Request
          Components: core engine
    Affects Versions: 7.7.0.Final
            Reporter: bharath mogali
            Assignee: Mario Fusco


Problem Statement:

We have few custom operators for Date and Strings, which are implemented looking at Str operator like shown here: https://github.com/kiegroup/drools/blob/f7ab4ee3c88d767a8cbb372c2db1afa84b20a51d/drools-core/src/main/java/org/drools/core/base/evaluators/StrEvaluatorDefinition.java

with below configuration in kie.properties.conf:

drools.evaluator.str = com.company.drools.operators.StrEvaluatorDefinition

For Custom Str operator we created, Drools runtime is not able to make distinction between Str[begins] and Str[ends].

What this means is when we are running below tests, we expect Rule-1 to fail and Rule-2 to get activated. But what we noticed is, Rule-2 will not be activated.

// Facts input into drools :
//     str1 = drools
//     str2 = dr 

rule "Rule-1"
   when message : Customer( str1 str[endsWith] str2 )
   then System.out.println("Rule - Str 1 -  fired");
end


rule "Rule-2"
   when message : Customer( str1 str[startsWith] str2 )
   then System.out.println("Rule - Str 2 - fired");
end
Other Observations:

If we change RHS to a a string literal like shown below, then Rule-2 will be Activated.

// Facts input into drools :
//     str1 = drools
//     str2 = dr 

rule "Rule-1"
   when message : Customer( str1 str[endsWith] "abc" )
   then System.out.println("Rule - Str 1 -  fired");
end


rule "Rule-2"
   when message : Customer( str1 str[startsWith] str2 )
   then System.out.println("Rule - Str 2 - fired");
end
Finally

We removed Str custom operator, and then used the out of the box Str operator provided by drools. We ran below mentioned tests again, this time Rule-2 gets activated.

// Facts input into drools :
//     str1 = drools
//     str2 = dr 

rule "Rule-1"
   when message : Customer( str1 str[endsWith] str2 )
   then System.out.println("Rule - Str 1 -  fired");
end


rule "Rule-2"
   when message : Customer( str1 str[startsWith] str2 )
   then System.out.println("Rule - Str 2 - fired");
end

Based on our tests, it seems like custom operators are not processed correctly.



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