public void Find(Action <OuterJoinNode <T1, T2> > callback)
{
if (_node == null)
{
OuterJoinNode <T1, T2> joinNode = _left.Successors
.OfType <OuterJoinNode <T1, T2> >()
.Where(node => _matchRight(node.RightActivation))
.FirstOrDefault();
if (joinNode != null)
{
_node = joinNode;
}
else
{
RightActivation <T2> rightActivation = _rightActivation();
_node = _configurator.Outer <T1, T2>(rightActivation);
_left.AddActivation(_node);
}
}
if (_node != null)
{
callback(_node);
}
}