def right_activation(self, wme):
"""
:type wme: rete.WME
"""
for t in self.items:
if self.perform_join_test(t, wme):
if not t.join_results:
Token.delete_token_and_descendents(t)
jr = NegativeJoinResult(t, wme)
t.join_results.append(jr)
wme.negative_join_result.append(jr)
def delete_node_and_any_unused_ancestors(cls, node):
"""
:type node: BetaNode
"""
if isinstance(node, JoinNode):
node.amem.successors.remove(node)
else:
for item in node.items:
Token.delete_token_and_descendents(item)
node.parent.children.remove(node)
if not node.parent.children:
cls.delete_node_and_any_unused_ancestors(node.parent)
def remove_wme(cls, wme):
"""
:type wme: WME
"""
for am in wme.amems:
am.items.remove(wme)
for t in wme.tokens:
Token.delete_token_and_descendents(t)
for jr in wme.negative_join_result:
jr.owner.join_results.remove(jr)
if not jr.owner.join_results:
for child in jr.owner.node.children:
child.left_activation(jr.owner, None)
def left_activation(self, t, w, binding=None):
"""
:type w: rete.WME
:type t: rete.Token
:type binding: dict
"""
new_result = Token(t, w, self, binding)
owners_t = t
owners_w = w
for i in range(self.number_of_conditions):
owners_w = owners_t.wme
owners_t = owners_t.parent
for token in self.ncc_node.items:
if token.parent == owners_t and token.wme == owners_w:
token.ncc_results.append(new_result)
new_result.owner = token
Token.delete_token_and_descendents(token)
self.new_result_buffer.append(new_result)