[rules-users] TypeDeclaration - POJO or TEMPLATE?

[Stephen Kestle]

I believe I have it... "declare" is meant to be used for easy generation 
of java classes, so that rules can instantiate objects and use them as 
such.  For dynamic data models, "template" is a better fit, as getField 
etc are geared towards map-like data structures.

I believe that I could have :

template "Address"
  String line1
  String line2
end

template "Person"
  String name
  int age
  Object address
end

rule "Test"
    when
        add: Address(line1 == "address")
        person: Person(address == add)
    then
        ...

Is this correct?

Cheers

Stephen Kestle wrote:
> I'm creating a type hierarchy using TypeDeclarations based on an 
> ontological model (analagous to an xml schema for the purposes of this 
> post).
>
> If I declare a drl file to have the following declarations
>
> declare Address
>   line1 : String
>   line2 : String
> end
>
> declare Person
>  name : String
>  age : int
>  address : Address
> end
>
> it will create Java Pojo classes for me.  However, I had it all 
> working using fact templates, except for the address item.  Is it 
> possible to insert fact implementations based on templates, while 
> declaring TypeDeclarations in the drl?  (I now go to look for how to 
> specify the format = TEMPLATE for the drl)
>
> I say this because I'm looking up values using id strings - e.g. the 
> exact same way that FactTemplate based Facts does accessing.  I don't 
> want to have to convert all my String ids to reflectively call the set 
> methods on the created Pojo.
>
> Hopefully this is enough info for you 5.0 developers - I'm still 
> trying to wrap my head around it all.
>
> Cheers
>
> Stephen
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