I understand the principle.
That's true the following code give me an access to the java object:
(defrule validate-virtualsite
(VirtualSite (inetModem ?inetModem))
=>
(printout t "Virtual site: " ?inetModem crlf)
)
With the following output :
Virtual site: <Java-Object:be.uniway.rvk.jesstest.model.InetModem>
But (because there's sadly a but)
The notation with the Object slot doesn't seems to work. Eclipse warn me with
this message if it can help:
Created implied ordered template at token 'OBJECT'
I'm completely lost :/
Thanks for your help!
Romain Van der Keilen.
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Ernest Friedman-Hill
Sent: vendredi 21 août 2009 17:14
To: jess-users
Subject: Re: JESS: Accessing Java objects fields from a defrule
Ah, OK, here's the thing: your patterns
?inetModem <- (InetModem (publicIpAddress ?publicIpAddress))
(VirtualSite (inetModem ?inetModem))
are checking that the jess.Fact object representing the InetModem in
working memory is in the inetModem slot of the VirtualSite fact -- but
it's not. The inetModem slot contains the actual Java InetModem
object. You get at that object by using the OBJECT slot, not by
binding the whole fact:
(InetModem (publicIpAddress ?publicIpAddress) (OBJECT ?inetModem)
(VirtualSite (inetModem ?inetModem))
That should do you.
On Aug 21, 2009, at 11:04 AM, Romain Van der Keilen wrote:
> All getters and setters are present, respecting the jababeans
> conventions:
>
> Those methods are in Virtualsite
> public InetModem getInetModem() {
> return inetModem;
> }
> public void setInetModem(InetModem inetModem) {
> this.inetModem = inetModem;
> }
> And those are in InetModem
> public String getPublicIpAddress() {
> return publicIpAddress;
> }
> public void setPublicIpAddress(String publicIpAddress) {
> this.publicIpAddress = publicIpAddress;
> }
>
> So I don't really see what's wrong ...
>
> Thanks,
>
> Romain Van der Keilen.
>
> -----Original Message-----
> From: [email protected] [mailto:owner-jess-
> [email protected]] On Behalf Of Ernest Friedman-Hill
> Sent: vendredi 21 août 2009 16:54
> To: jess-users
> Subject: Re: JESS: Accessing Java objects fields from a defrule
>
>
> Normally, slots in Jess templates are based on JavaBeans properties --
> i.e., a method named "getInetModem" will give rise to a slot named
> "inetModem". If you include the "include-variables TRUE" declaration,
> then slots will also be created based on *public* member variables.
> Under no circumstances will Jess create slots based on private member
> variables.
>
>
>
> On Aug 21, 2009, at 10:39 AM, Romain Van der Keilen wrote:
>
>> Here is the exact code I use:
>>
>> (import be.uniway.rvk.jesstest.model.*)
>> (deftemplate VirtualSite (declare (from-class VirtualSite)))
>> (deftemplate InetModem (declare (from-class InetModem)))
>>
>> (defrule validate-virtualsite
>> "Just put the validate attribute to true!"
>> ?inetModem <- (InetModem (publicIpAddress ?publicIpAddress))
>> (VirtualSite (inetModem ?inetModem))
>> =>
>> (printout t "Internet modem address: " ?publicIpAddress crlf)
>> )
>>
>>
>> Using:
>>
>> VirtualSite
>> + private InetModem inetModem
>>
>> InetModem
>> + private String publicIpAddress
>>
>> Maybe the private fields are disturbing Jess?
>>
>> Regards,
>>
>> Romain Van der Keilen.
>>
>>
>>
>> From: [email protected] [mailto:owner-jess-
>> [email protected]] On Behalf Of Romain Van der Keilen
>> Sent: vendredi 21 août 2009 16:15
>> To: [email protected]
>> Subject: RE: JESS: Accessing Java objects fields from a defrule
>>
>> Thanks for the response,
>>
>> You've exactly put the finger on what I wish do, but I just tried
>> that and I've no output :s
>>
>> From: [email protected] [mailto:owner-jess-
>> [email protected]] On Behalf Of Wolfgang Laun
>> Sent: vendredi 21 août 2009 15:41
>> To: [email protected]
>> Subject: Re: JESS: Accessing Java objects fields from a defrule
>>
>> First, you bind to the contained object, and then you locate the
>> containing object.
>>
>> (defrule mydoor
>> ?door <- (Door (weight ?weight)(color ?color))
>> (House (myDoor ?door)(owner "Mick"))
>> =>
>> (printout t "Weight of Mick's door :" ?weight crlf)
>> )
>>
>> Restrictions on weight or color, e.g., to paint red doors black ;-)
>> can be added in the usual way.
>>
>> -W
>> On Fri, Aug 21, 2009 at 12:12 PM, Romain Van der Keilen
>> <[email protected]
>>> wrote:
>> Hi there,
>>
>> I have a little question for you I can't fix by myself: how to
>> access the fields of a java Object that is itself a field of an
>> other java object?
>> Here is a tiny sample :
>>
>> Object Door
>> + int weight
>> + String color
>>
>> Object House
>> + Door myDoor
>>
>> Now I give the House to the Rete engine, how can I access (and
>> manipulate) for example the weight of my door?
>>
>> By now I just can display it like this:
>> (defrule mydoor
>> (House (myDoor ?myDoor))
>> =>
>> (printout t "Weight of my house's door :" ?myDoor.weight crlf)
>> )
>> But the thing I want to do is to catch that weight to make some
>> checks on it, then displaying the checks' results (for examples, is
>> my door heavier than 25kg).
>>
>> Thanks for help
>>
>> Romain Van der Keilen
>>
>>
>>
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>>
>>
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>
> ---------------------------------------------------------
> Ernest Friedman-Hill
> Informatics & Decision Sciences Phone: (925) 294-2154
> Sandia National Labs
> PO Box 969, MS 9012 [email protected]
> Livermore, CA 94550 http://www.jessrules.com
>
>
>
>
>
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> [email protected]'
> in the BODY of a message to [email protected], NOT to the list
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> --------------------------------------------------------------------
>
>
>
> --------------------------------------------------------------------
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> in the BODY of a message to [email protected], NOT to the list
> (use your own address!) List problems? Notify [email protected]
> .
> --------------------------------------------------------------------
---------------------------------------------------------
Ernest Friedman-Hill
Informatics & Decision Sciences, Sandia National Laboratories
PO Box 969, MS 9012, Livermore, CA 94550
http://www.jessrules.com
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