[rules-dev] use of declared facts

[Michal Bali]

Thanks Edson,
BTW, I've tried to instantiate an internal fact in a rule with MVEL dialect
but it didn't worked. I've tried this in M4. I' haven't tried it yet in M5.

Is this a known issue or should I create a new JIRA with test case?

Best Regards,
Michal


On Tue, Jan 27, 2009 at 2:31 PM, Edson Tirelli <tirelli at post.com> wrote:

>
>    Michal is correct from the point of view of the application. That is
> required because the actual classes are generated at compile time and not
> visible to the application classpath.
>
>    Although, that is not the only way. Inside your rules, they are visible
> and you instantiate them the same way as you instantiate any other java
> Pojo:
>
> rule xyz
> when
>      // sometihng
> then
>      Person p = new Person();
>      p.setName( "Bob" );
>      insert( p );
> end
>
>     Also, if you use Guvnor to define your model, Guvnor is capable of
> generating a jar file for you with the generated classes. This way you can
> download the jar and add it to the classpath of your application and use it
> as any POJOs too.
>
>     []s
>     Edson
>
>
> 2009/1/27 Michal Bali <michalbali at gmail.com>
>
> Look at this unit test for some examples:
>>
>> http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-compiler/src/test/java/org/drools/integrationtests/MiscTest.java
>>
>>         // Retrieve the generated fact type
>>         FactType cheeseFact = ruleBase.getFactType(
>> "org.drools.generatedbeans.Cheese" );
>>
>>         // Create a new Fact instance
>>         Object cheese = cheeseFact.newInstance();
>>
>>         // Set a field value using the more verbose method chain...
>>         // should we add short cuts?
>>         //        cheeseFact.getField( "type"
>> ).getFieldAccessor().setValue( cheese,
>>         //
>> "stilton" );
>>
>>         cheeseFact.set( cheese,
>>                         "type",
>>                         "stilton" );
>>         assertEquals( "stilton",
>>                       cheeseFact.get( cheese,
>>                                       "type" ) );
>>
>>
>> On Tue, Jan 27, 2009 at 2:02 AM, Oleg Zenzin <zenzin at intalio.com> wrote:
>>
>>> There's now possibility to declare facts in the drl, like:
>>>
>>> declare Person
>>>  name: String
>>>  age: int
>>> end
>>>
>>> My question is how do I instantiate this fact object during runtime? Do I
>>> still need to have class Person compiled and existing somewhere in
>>> classpath, or there's a helper class which I can use "fake the fact",
>>> something like:
>>>
>>>   FakeFact person = FakeFact("Person");
>>>   person.setField("name", "Oleg");
>>>   person.setField("age", "42");
>>>   session.insert(person);
>>>
>>> Or there's another nicer way?
>>>
>>> Thank you,
>>> -Oleg Zenzin
>>>
>>> _______________________________________________
>>> rules-dev mailing list
>>> rules-dev at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-dev
>>>
>>>
>>
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>>
>>
>
>
> --
>  Edson Tirelli
>  JBoss Drools Core Development
>  JBoss, a division of Red Hat @ www.jboss.com
>
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>
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