I have a similar question regarding accessing Java collections from Jess.
How do you do this from inside a rule? I've read through the book and
searched the forum but unfortunately am still not clear on this.
Thanks!
Ernest Friedman-Hill wrote:
>
> You deal with Java objects from Jess the same way you deal with them
> from Java. There is no special syntax for dealing with collections --
> you just call the Java methods. To call a method "y" on a Java object
> in variable ?x with argument "z", you write
>
> (?x y "z")
>
> Here you want to call "get" on the ArrayList to get an element, and
> "getValue" on the result; it looks like
>
> (bind ?theObject (?arraylist get 1))
> (?theObject getValue "value1")
>
> of course you can eliminate the extra variable ?theObject and write
>
> ((?arraylist get 1) getValue "value1")
>
> Now, I'm a tiny bit concerned that you didn't actually mean
> "ArrayList" but rather "array" in your original post; which is it?
>
>
> On Sep 26, 2007, at 3:15 PM, Andrew Meng wrote:
>
>> Hello,
>>
>> I have a java arraylist collection declared in Jess. In a rule's
>> defination, I want to get some value from a object contained in
>> arraylist. like,
>> (> arraylist[1].getValue("value1") arraylist[0].getValue
>> ("value2") )
>>
>> Can anyone tell me what is the right way to do it in Jess?
>>
>> Thanks a lot in advance!
>> Andrew
>>
>> Discover the new Windows Vista Learn more!
>
> ---------------------------------------------------------
> Ernest Friedman-Hill
> Advanced Software Research Phone: (925) 294-2154
> Sandia National Labs FAX: (925) 294-2234
> PO Box 969, MS 9012 [EMAIL PROTECTED]
> Livermore, CA 94550 http://www.jessrules.com
>
> --------------------------------------------------------------------
> To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]'
> in the BODY of a message to [EMAIL PROTECTED], NOT to the list
> (use your own address!) List problems? Notify [EMAIL PROTECTED]
> --------------------------------------------------------------------
>
>
>
--
View this message in context:
http://www.nabble.com/JESS%3A-How-to-access-info-in-a-objects-cotained-in-a-arraylist.-tf4524484.html#a12931035
Sent from the Jess mailing list archive at Nabble.com.
--------------------------------------------------------------------
To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]'
in the BODY of a message to [EMAIL PROTECTED], NOT to the list
(use your own address!) List problems? Notify [EMAIL PROTECTED]
--------------------------------------------------------------------
