# Source code for spinnman.processes.most_direct_connection_selector

# Copyright (c) 2017-2019 The University of Manchester
#
# This program is free software: you can redistribute it and/or modify
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

from spinn_utilities.overrides import overrides
from .abstract_multi_connection_process_connection_selector import (
AbstractMultiConnectionProcessConnectionSelector)

[docs]class MostDirectConnectionSelector(
AbstractMultiConnectionProcessConnectionSelector):
""" A selector that goes for the most direct connection for the message.
"""
__slots__ = [
"_connections",
"_first_connection",
"_machine"]

# pylint: disable=super-init-not-called
def __init__(self, machine, connections):
"""
:param ~spinn_machine.Machine machine:
:param list(SCAMPConnection) connections:
The connections to be used
"""
self._machine = machine
self._connections = dict()
self._first_connection = None
for connection in connections:
if connection.chip_x == 0 and connection.chip_y == 0:
self._first_connection = connection
self._connections[
(connection.chip_x, connection.chip_y)] = connection
if self._first_connection is None:
self._first_connection = next(iter(connections))

[docs]    def set_machine(self, new_machine):
"""
:param ~spinn_machine.Machine new_machine:
"""
self._machine = new_machine

[docs]    @overrides(
AbstractMultiConnectionProcessConnectionSelector.get_next_connection)
def get_next_connection(self, message):
if self._machine is None or len(self._connections) == 1:
return self._first_connection

chip = self._machine.get_chip_at(