[rules-users] Ask for help on rule authoring

[Benson Fung]

so how can I change it to integer in the rule?



2011/3/26 Wolfgang Laun <wolfgang.laun at gmail.com>:
> If it's stored in a fact field of type int: yes.
>
> The way you write it: no.
>
> -W
>
>
> On 25 March 2011 18:37, Benson Fung <benson.redhat at gmail.com> wrote:
>>
>> If the age is String type, can I use Integer.parseInt(age) to change
>> to integer and then evaluate it?
>>
>> like
>>
>> when
>>   ad : ApplicationData(Integer.parseInt(age) < 0)
>> then
>>  ad.setReturnMsg("age should not be negative 0")
>> end
>>
>>
>>
>>
>> 2011/3/26 Wolfgang Laun <wolfgang.laun at gmail.com>:
>> > Sorry, I don't use guided editors.
>> > -W
>> >
>> > On 25 March 2011 18:17, Benson Fung <benson.redhat at gmail.com> wrote:
>> >>
>> >> Hi Wolfgang,
>> >>
>> >> I managed to author this rule(ApplicationData( age == null || age ==
>> >> "" )) via Technical Rules editor of BRMS.
>> >> However, I cannot create this rule via Business Rule Guided Editor of
>> >> BRMS.
>> >>
>> >> Could you let me know how?
>> >>
>> >>
>> >> Thanks
>> >>
>> >>
>> >>
>> >> 2011/3/26 Wolfgang Laun <wolfgang.laun at gmail.com>:
>> >> > You can't use a method call as the left hand side operand in a
>> >> > constraint;
>> >> > thus
>> >> >    age.size() == 0
>> >> > is not correct.
>> >> >
>> >> > Do you really mean
>> >> >    age == "null"
>> >> >
>> >> > Probably
>> >> >   ApplicationData( age == null || age == "" )
>> >> > is the right thing to do, provided that ApplicationData.age is a
>> >> > String.
>> >> >
>> >> > -W
>> >> >
>> >> > On 25 March 2011 17:32, Benson Fung <benson.redhat at gmail.com> wrote:
>> >> >>
>> >> >> Hi,
>> >> >>
>> >> >> I got the following rule problem.
>> >> >>
>> >> >> The rule is like :
>> >> >>
>> >> >> 1.      |       rule "Rule1"
>> >> >> 2.      |           dialect "mvel"
>> >> >> 3.      |           when
>> >> >> 4.      |               ad : ApplicationData( age == "null" ,
>> >> >> age.size()
>> >> >> == 0)
>> >> >> 5.      |           then
>> >> >> 6.      |               ad.setReturnMsg( "age should not be null or
>> >> >> empty"
>> >> >> );
>> >> >> 7.      |       end
>> >> >>
>> >> >> where setReturnMsg is a method of ApplicationData Fact();
>> >> >>
>> >> >> However, I got the validation error :
>> >> >>
>> >> >> [Rule1] [ERR 101] Line 4:49 no viable alternative at input ')' in
>> >> >> rule
>> >> >> "Rule1" in pattern ApplicationData
>> >> >> [Rule1] [ERR 102] Line 4:51 mismatched input '==' expecting ')' in
>> >> >> rule "Rule1" in pattern ApplicationData
>> >> >>
>> >> >> Please help what the problem is.
>> >> >>
>> >> >>
>> >> >> Thanks
>> >> >> _______________________________________________
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>> >> >> rules-users at lists.jboss.org
>> >> >> https://lists.jboss.org/mailman/listinfo/rules-users
>> >> >
>> >> >
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>> >> >
>> >> >
>> >>
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>> >
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>>
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