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

[Michael Anstis]

As a reminder, if you need to know the ClassA to which the Student belongs
you'll need to make the association to avoid cross-products:-

when
$s : Student( )
$c : ClassA( students contains $s )
then
...

2010/12/27 Esteban Aliverti <esteban.aliverti at gmail.com>

> 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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