[rules-users] drrols type declaration and how are the equals and hashcode for those types implemented...

[Zoltan Farkas]

I could write a patch emphasizing the use of it, but first I would like
to understand the metadata part.

 

The following metadata that I saw on some blogs is also in my interest:
@role, @timestamp, and the documentation misses them too, I found them
only in some blog entries.

 

Can you point me to any resource (blogs, code ...) that can give me a
better understanding so that I can write something of decent quality?

 

Also it would be nice to have metadata support in the guvnor fact model
builder.

 

Thanks

 

--zoly

 

________________________________

From: rules-users-bounces at lists.jboss.org
[mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Edson Tirelli
Sent: Monday, February 23, 2009 7:49 PM
To: Rules Users List
Subject: Re: [rules-users] drrols type declaration and how are the
equals and hashcode for those types implemented...

 


      We need to improve docs on that, as it is only mentioned briefly:

https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/
trunk/target/docs/drools-expert/html/ch07.html#d0e3206

      The @key will do it for you:

declare Person
    name : String
    ssn : BigDecimal @key
    age : int
end
   
     Wanna write a quick patch for the docs emphasizing the use of it?

     Thanks,
         
     []s
     Edson

2009/2/23 Zoltan Farkas <zoly at daxtechnologies.com>

declare Person

  name : String

  ssn: BigDecimal

  age : int

end

 

 

Is there a way to define what field/s identify a Person?

 

In the example above I would like to define ssn as the unique
indentifier for person, so person1 == person2 if person1.ssn ==
person2.ssn.

 

In this case equals would use only the field ssn to determine if 2
person objects are equal.

The hashcode should also be based only on the ssn field.

 

I want to use Person with assertBehaviour equality...

 

Thanks

 

--zoly

 

 


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-- 
 Edson Tirelli
 JBoss Drools Core Development
 JBoss, a division of Red Hat @ www.jboss.com

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