[rules-users] Tree iteration with accumulate: is it possible ?

[mcyrb]

Hello.

I have a tree, with each leaf containing a random value.
The value of each node is the sum of its children value.

I would like to write a rule which looks like this:
when
   nodeValue == 18 (e.g.)
then
   // do something with this node
end

The accumulate conditional element looked adequate for this, so I wrote
something like this
when
   n: Node()
   accumulate( Leaf( parentNode == n, v : value ); nodeValue : sum( v );
nodeValue == 18 )
then
   // do something with n
end

So... the problem is that this works only for nodes where its direct childs
are leafs, and not for upper nodes.
Have you got an idea to solve this ?

Thank you



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