Am 28.05.2011 18:26, schrieb Edson Tirelli:

Wolfgang,

I think Davide's implementation supports extending existing java classes... did you tried? What is not possible is to implement interfaces, since you can't define methods in the declare statement.

Hi,

from a user's point of view, who has been using Drools Expert in production for years now, I'm wondering why there aren't *unit tests* which are capable of answering this basic question in no time?

If test coverage is as low as it seems, can you recommend using Drools Expert in production with a clear conscience?

Best regards

Ansgar
(the heretic ;-)

Edson

2011/5/28 Wolfgang Laun <wolfgang.laun@gmail.com>

There is, since 5.2.0, the option of extending a class declared in DRL:

declare A
i : int
end

declare B extends A
...
end

Any class origninating from Java code cannot be extended in DRL.

-W

On 28 May 2011 10:56, Tomas Olsson <tol@sics.se> wrote:

Hi,
I have tried to look this up but cannot find any clear answer on the web.
Does drools support extension of existing classes for new type declarations?
That would be very nice if this would be possible.

/Tomas
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Edson Tirelli
JBoss Drools Core Development
JBoss by Red Hat @ www.jboss.com
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