[rules-users] verifying 'is not null' in decision table?

[Swindells, Thomas]

You can probably do what you need by using XOR-GROUPS (activation groups).

If your spreadsheet is configured to be sequential (or you explicitly set rule priority levels) then only the highest priority matching rule in a particular xor-group will be fired.



So you may be able to specify the rules as follows:
CONDITION

CONDITION

CONDITION

CONDITION

ACTION

XOR-GROUP

Foo





Date1 $param null

Date2 $param null

Date3 $param null

Date4 $param null

setPriority($param)



Date1

Date2

Date3

Date4

setPriority($param)









!=

1

DateXORGroup





!=



2

DateXORGroup



!=





3

DateXORGroup

!=







4

DateXORGroup




Then if Date4 is set the first rule would be fired, otherwise if date3 is set then row 2 would be fired etc.

If there are more permuations that you want to consider you can easily insert them too.



Hope that helps,



Thomas



> -----Original Message-----

> From: rules-users-bounces at lists.jboss.org [mailto:rules-users-

> bounces at lists.jboss.org] On Behalf Of HonorGod

> Sent: 22 December 2009 11:21

> To: rules-users at lists.jboss.org

> Subject: Re: [rules-users] verifying 'is not null' in decision table?

>

>

> Thanks Thomas. I got this part now. But I guess the real scenarios I have

> been looking is -

>

> I have 4 different date fields and I need to check if they are not null and

> set a priority using decision table.

>

> Lets say I have Date 1 , Date 2  , Date 3 , Date 4. If Date 1 is not null

> and rest of them are null then my priority is Date 1. If Date 1 and Date 2

> are not null and the rest are null then my priority is Date 2 and so

> no.....so we are looking at 16 different possibilites and the

> priorities....how can i set the priority in this case...

>

> Thanks

>

> Swindells, Thomas wrote:

> >

> > The key thing to remember with decision tables is that currently a column

> > is only included if there is a value in the rule row and that value will

> > always be included in the rule. The easiest way to do this is to have a

> > condition in the form "firstName != $param" and then have null as the cell

> > value. The other solution if you want separate rules for each field which

> > cannot be null is to have it in the form "$param != null" and enter the

> > field name as the cell value.

> >

> > Thomas

> >

> >> -----Original Message-----

> >> From: rules-users-bounces at lists.jboss.org [mailto:rules-users-

> >> bounces at lists.jboss.org] On Behalf Of HonorGod

> >> Sent: 21 December 2009 15:52

> >> To: rules-users at lists.jboss.org

> >> Subject: [rules-users] verifying 'is not null' in decision table?

> >>

> >>

> >> How can I verify if my condition attribute is not null in decision table?

> >>

> >> I have a class -

> >>

> >> Public Class Person {

> >>

> >> String firstName = null;

> >> String lastName = null ;

> >>

> >> }

> >>

> >> In my decision table I have to check if firstName and lastName are not

> >> null

> >> and then fire actions.

> >>

> >> How I can do this? I know I can get that through drl.

> >>

> >> Thanks

> >>

> >> --

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> >> http://n3.nabble.com/verifying-is-not-null-in-

> >> decision-table-tp96386p96386.html

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> >

> >

> >

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> decision-table-tp96386p97139.html

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