def __init__(self,
*publishers: Publisher,
map_: Callable[..., Any] = None,
emit_on=None) -> None:
MultiOperator.__init__(self, *publishers)
# ._partial_state is a list keeping the latest emitted values from
# each publisher. Stateless publishers will always keep the NONE entry
# in this list.
self._partial_state = [NONE for _ in publishers
] # type: MutableSequence[Any]
# ._missing is keeping a set of source publishers which are required to
# emit a value. This set starts with all source publishers. Stateful
# publishers are required, stateless publishers not (will be removed
# in .subscribe).
self._missing = set(publishers)
# ._index is a lookup table to get the list index based on publisher
self._index = \
{p: i for i, p in enumerate(publishers)
} # type: Dict[Publisher, int]
# .emit_on is a set of publishers. When a source publisher is emitting
# and is not in this set the CombineLatest will not emit a value.
# If emit_on is None all the publishers will be in the set.
if isinstance(emit_on, Publisher):
self._emit_on = (emit_on, )
else:
self._emit_on = emit_on
self._map = map_
def subscribe(self, subscriber: 'Subscriber',
prepend: bool = False) -> SubscriptionDisposable:
disposable = MultiOperator.subscribe(self, subscriber, prepend)
if self._missing:
self._missing.clear()
if self._state is NONE:
Publisher.notify(self, self._init)
else:
Publisher.notify(self, self._state)
return disposable
def unsubscribe(self, subscriber: Subscriber) -> None:
MultiOperator.unsubscribe(self, subscriber)
if not self._subscriptions:
self._missing = set(self._orginators)
self._partial_state[:] = [NONE for _ in self._partial_state]
def unsubscribe(self, subscriber: Subscriber) -> None:
MultiOperator.unsubscribe(self, subscriber)
if not self._subscriptions:
self._missing.update(self._originators)
self._state = NONE
def __init__(self, publisher_bit_mapping: Dict, init: int = 0) -> None:
MultiOperator.__init__(self, *publisher_bit_mapping)
self._init = init
self._missing = set(self._originators)
self._publisher_bit_mapping = publisher_bit_mapping