[rules-users] need to manipulate ArrayList in rules Reg:

[Murali Venugopal]

Hi,
Thanks for the input. I've opted the second one and it's working.
Thanks for your timely support Esteban.
.

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| | ||_|| (_|||  \/

Whoever wants to be happy, let him be so: of tomorrow there's no knowing


On 12/27/2010 05:46 PM, Esteban Aliverti wrote:
> You have 2 simple approaches:
>
>    1. Insert all your Students as facts and create regular rules like
>       /Student(name == 'something')/
>    2. Use the /from/ keyword:
>       /$c: ClassA ()
>       Student(name == "something") from $c.students/
>
> Best Regards,
>
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>
> Esteban Aliverti
> - Developer @ http://www.plugtree.com <http://www.plugtree.com>
> - Blog @ http://ilesteban.wordpress.com
>
>
> On Mon, Dec 27, 2010 at 5:23 AM, Murali Venugopal 
> <murali.venugopal at sifycorp.com <mailto:murali.venugopal at sifycorp.com>> 
> wrote:
>
>
>     Hi,
>
>     I'm inserting an Object calld ClassA into the working memory.
>     Which has got it's students in an ArrayList
>
>     Like this...
>
>     public class ClassA {
>
>     private String RoomNo;
>     private ArrayList<Student>  students;
>
>     ...
>
>     }
>
>     public class Student {
>
>     private String name;
>     private String rollNo;
>
>     ...
>
>     }
>
>     Now, i've to write a rule to find a particular student with his
>     role number and fetch his name to make some decisions.
>
>     I don't know to write a rule to access an Object's data member of
>     type ArrayList and find a match. Please help.
>
>     Thanks in advance.
>
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