I've found that the method below behaves differently in Jess 7.0b7 and
the formal v7.0 release. In the formal release, the Activations
provided by the Iterator in 2 successive calls to Rete.listActivations()
are different objects, even if nothing has happened between the calls.
The change
A good technical question!
The method listActivations() is not used internally by Jess; it's
just provided for use by tools of various kinds. It's a fairly
expensive method because it makes a copy of the whole agenda, and
iterating over this copy does a full sort. The copy is necessary;
