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

[Wolfgang Laun]

I think that the simplest solution would be to either store the sum of
the children's values into each Node, or to create and insert
additional facts containing these sums, in parallel to non-leaf Node
facts.
-W

On 28/02/2013, mcyrb <cyrille.martins at thalesgroup.com> wrote:
> 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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