I would suggest that you assert all of your objects into working memory. For example, if you have the object A with an embedded B and C, you need to do the following<br><br>insert(A);<br>insert(A.B);<br>insert(A.C);<br><br>
than within your rules, join the objects where needed<br><br>rule<br> <br> A(b$ : b != null)<br> B(this == b$)<br><br>etc. <br><br><div class="gmail_quote">On Mon, Feb 23, 2009 at 10:39 AM, Corneil du Plessis <span dir="ltr"><<a href="mailto:corneil@tsctech.com">corneil@tsctech.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
You should initialise your globals and then pass them into the session.<br>
Your rule file will have:
<pre>global java.lang.String recipients
global java.lang.String to
global java.lang.String cc
</pre><div><div></div><div class="Wj3C7c">
On Mon, 2009-02-23 at 06:23 -0800, D1vy@@Ind1@ wrote:
<blockquote type="CITE">
<pre>Thanks for your help , Sudhir,
I used
rule
when $a:A(b.z.s=="test");
then
end
And that solved my problem.
But I would like to know one more information about global variables.
package...
dialect java
import ..,
global java.lang.String recipients="<a href="mailto:divya@gmail.com" target="_blank">divya@gmail.com</a>"
global java.lang.String to="<a href="mailto:xyz@yahoo.com" target="_blank">xyz@yahoo.com</a>"
global java.lang.String cc="<a href="mailto:abc@gmail.com" target="_blank">abc@gmail.com</a>"
rule
when when $a:A(b.z.s=="divya");
then
$a.setRecipients(recipients);
$a.setTo(to);
$a.setCC(cc);
update($a)
end
Is this feasible with Drools. I get
unable to comile myfile.drl file
[9,40]: unknown:9:40 mismatched token: [@49,201:201='=',<71>,9:40];
E
exception. Could you please help me with this too.
Thanks
-D
Sudhir M-2 wrote:
>
> Hi D,
> I don't know which version of drools are you using. If u are using drools
> 4
> or higher you can use 'from' to write rules on nested objects. All u need
> to do is insert the root pbject in the working memory
>
> Regards,
> sudhir.
>
> On Mon, Feb 23, 2009 at 2:56 PM, Divya Rajendranath <
> <a href="mailto:divya.rajendranath@gmail.com" target="_blank">divya.rajendranath@gmail.com</a>> wrote:
>
>> Hi,
>>
>> I am planning to use Drools - JBoss Rules Engine. My requirement is to
>> disburse mails from my application to different groups based on various
>> criteria. I want to use Drools here.
>>
>> My object structure is as follows:
>>
>> class A{
>>
>> String B = "";
>>
>> B b;
>>
>> C c;
>> }
>>
>> Hence Obj A has embedded objects within it, and obj B and C further has
>> embedded objects.
>>
>> class B {
>>
>> String X;
>>
>> Z z;
>>
>> }
>>
>> class Z{
>>
>> String t;
>>
>> String s;
>>
>> }
>>
>> The decision on sending the mails based on the fields in embedded objects
>> of A. I pass instance of A to Drools
>>
>> Format of drl file:
>>
>> package...;
>>
>> import ..;
>>
>> rule "Test"
>>
>> when $a:A(B(Z(s == "testvalue")))
>>
>> then
>>
>> $a.setSomething();
>>
>> update($a);
>>
>> end
>>
>> I wanted to know if this (accessing fields in embedded/child object) is
>> feasible with Drools.
>>
>> I get an error saying "UNable to compile myfile.drl when i try to fo
>> this.
>>
>> Could some one look into this issue and let me know the reason for this ?
>>
>>
>>
>> Thanks
>>
>> -D
>>
>> _______________________________________________
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>>
>>
>
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>
</pre>
</blockquote>
</div></div></div>
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