Re: [rules-users] TypeDeclaration - POJO or TEMPLATE?

Stephen Kestle Tue, 26 Aug 2008 22:18:15 -0700

Title: Orion Signature

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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Re: [rules-users] TypeDeclaration - POJO or TEMPLATE?

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