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

[Esteban Aliverti]

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
- Blog @ http://ilesteban.wordpress.com


On Mon, Dec 27, 2010 at 5:23 AM, Murali Venugopal <
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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