[rules-users] How to define keywords that represent objects(in facts) to be able to use in rules

[Wolfgang Laun]

The basic idea of the DSL implementation in Drools is to use phrases (and
not just single
keywords) with a translation into DRL. These phrases can have parameters.

On 9 August 2012 19:08, san_drools <pathasantosh at yahoo.co.in> wrote:

>      Laune, the problem is when i define a keyword like i said above
> "PersonMobileContact" for Object1($ContactNum : contactNumber &&
> contacttype
> == "mobile"). In business rule, i can use this keyword.
>
>      This is ok, but if i want to set this $ContactNum into another object
> i.e. Object2. I think i need to define the key for this action too (like
> "setContactNo" --> $Object2.setAccessPoint($ContactNum));) Because we
> cannot
> access $ContactNum directly. Or is any other way to do this.
>

You can use "$ContactNum" from the DRL translation. It's not "hidden".


> And another point to achieve is we will have to refer different objects for
> a keyword based on context. If we see above example, For
> "PersonMobileContact" if the context is "productdelivery" i need to refer
> Object1. and if the context is "meetingschedule" i need to refer Object2.
>
>
Here you might use a parameter. Your DSL phrase can be

 [when] PersonMobileContact with {X} ={X} ($ContactNum : contactNumber &&
contacttype
== "mobile")

and you can write

   PersonMobileContact with Object1
   PersonMobileContact with Object2

-W


>   I am just beginner in drools, so the things are new to me. Please
> suggest.
>
>
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/How-to-define-keywords-that-represent-objects-in-facts-to-be-able-to-use-in-rules-tp4019065p4019071.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20120809/c1d302e6/attachment.html