[rules-users] How to execute a rule only when a fact is retracted

[Wolfgang Laun]

On 17/10/2012, Greg Barton <greg_barton at yahoo.com> wrote:
> And if you can't modify the original fact class, like Wolfie says below,
> insert a control fact that points back to the original, and have rules match
> off of that:
>
> class RetractionHandler {
>   public OriginalFactClass theDoomedFact;
> }
>

It's probably sufficient to have one generic class for all kinds of doomies:

class RetractionHandler {
   public Object theDoomedFact;
}

-W