def test_network_case1():
# setup
net = Network()
c0 = Has('$x', 'on', '$y')
c1 = Has('$y', 'left-of', '$z')
c2 = Has('$z', 'color', 'red')
net.add_production(Rule(c0, c1, c2))
# end
am0 = net.build_or_share_alpha_memory(c0)
am1 = net.build_or_share_alpha_memory(c1)
am2 = net.build_or_share_alpha_memory(c2)
dummy_join = am0.successors[0]
join_on_value_y = am1.successors[0]
join_on_value_z = am2.successors[0]
match_c0 = dummy_join.children[0]
match_c0c1 = join_on_value_y.children[0]
match_c0c1c2 = join_on_value_z.children[0]
wmes = [
WME('B1', 'on', 'B2'),
WME('B1', 'on', 'B3'),
WME('B1', 'color', 'red'),
WME('B2', 'on', 'table'),
WME('B2', 'left-of', 'B3'),
WME('B2', 'color', 'blue'),
WME('B3', 'left-of', 'B4'),
WME('B3', 'on', 'table'),
WME('B3', 'color', 'red')
]
for wme in wmes:
net.add_wme(wme)
assert am0.items == [wmes[0], wmes[1], wmes[3], wmes[7]]
assert am1.items == [wmes[4], wmes[6]]
assert am2.items == [wmes[2], wmes[8]]
assert len(match_c0.items) == 4
assert len(match_c0c1.items) == 2
assert len(match_c0c1c2.items) == 1
t0 = Token(Token(None, None), wmes[0])
t1 = Token(t0, wmes[4])
t2 = Token(t1, wmes[8])
assert match_c0c1c2.items[0] == t2
net.remove_wme(wmes[0])
assert am0.items == [wmes[1], wmes[3], wmes[7]]
assert len(match_c0.items) == 3
assert len(match_c0c1.items) == 1
assert len(match_c0c1c2.items) == 0
def left_activation(self, token, wme, binding=None):
"""
:type wme: WME
:type token: Token
:type binding: dict
"""
new_token = Token(token, wme, node=self, binding=binding)
self.items.append(new_token)
def left_activation(self, t, w, binding=None):
"""
:type w: rete.WME
:type t: rete.Token
:type binding: dict
"""
new_token = Token(t, w, self, binding)
self.items.append(new_token)
for result in self.partner.new_result_buffer:
self.partner.new_result_buffer.remove(result)
new_token.ncc_results.append(result)
result.owner = new_token
if not new_token.ncc_results:
for child in self.children:
child.left_activation(new_token, None)
def build_or_share_beta_memory(self, parent):
"""
:type parent: BetaNode
:rtype: BetaMemory
"""
for child in parent.children:
if isinstance(child, BetaMemory):
return child
node = BetaMemory(None, parent)
# dummy top beta memory
if parent == self.beta_root:
node.items.append(Token(None, None))
parent.children.append(node)
self.update_new_node_with_matches_from_above(node)
return node
def left_activation(self, token, wme, binding=None):
"""
:type wme: rete.WME
:type token: rete.Token
:type binding: dict
"""
new_token = Token(token, wme, self, binding)
self.items.append(new_token)
for item in self.amem.items:
if self.perform_join_test(new_token, item):
jr = NegativeJoinResult(new_token, item)
new_token.join_results.append(jr)
item.negative_join_result.append(jr)
if not new_token.join_results:
for child in self.children:
child.left_activation(new_token, 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)