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memberOf in a eval statement (dialect mvel)

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memberOf in a eval statement (dialect mvel)

vdelbart
Hi,

I want to use the keyword memberOf in an eval statement (with dialect = mvel).

rule "Your 5 Rule"
        dialect "mvel"
        when
                 $l:ArrayList()
                 eval("test" memberOf $l)
        then
                #actions
                System.out.println("OK");
end

but it doesn't work, and I don't understand the error :
Caused by: java.lang.ClassCastException: java.lang.String
        at org.drools.base.mvel.MVELEvalExpression.evaluate(MVELEvalExpression.java:36)
        at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:72)
        ... 12 more

Thanks for your help,

V.
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Re: memberOf in a eval statement (dialect mvel)

Edson Tirelli-3

   Not sure why do you want to do that. Better would be to simply:

rule "Your 5 Rule"
        dialect "mvel"
        when
                 $l:ArrayList( this contains "test" )
        then
                #actions
                System.out.println("OK");
end

   If you want to do that inside an eval, MVEL does not have "memberOf" operator, but it has "contains", so just write:

eval( $l contains "test" )
 
   []s
   Edson


2007/12/7, vdelbart <[hidden email]>:

Hi,

I want to use the keyword memberOf in an eval statement (with dialect =
mvel).

rule "Your 5 Rule"
        dialect "mvel"
        when
                 $l:ArrayList()
                 eval("test" memberOf $l)
        then
                #actions
                System.out.println("OK");
end

but it doesn't work, and I don't understand the error :
Caused by: java.lang.ClassCastException: java.lang.String
        at
org.drools.base.mvel.MVELEvalExpression.evaluate(MVELEvalExpression.java:36)
        at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java :72)
        ... 12 more

Thanks for your help,

V.
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  Edson Tirelli
  JBoss Drools Core Development
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