Adds types to Lifecycle Objects (#1338)

Signed-off-by: Michael Carlstrom <rmc@carlstrom.com>

rclpy/rclpy/impl/_rclpy_pybind11.pyi

@@ -16,7 +16,7 @@ from __future__ import annotations
 
 from enum import Enum, IntEnum
 from types import TracebackType
-from typing import Any, Generic, Literal, overload, Sequence, TypedDict
+from typing import Any, Generic, Literal, overload, Sequence, TypeAlias, TypedDict
 
 from rclpy.clock import JumpHandle
 from rclpy.clock_type import ClockType
@@ -101,21 +101,23 @@ class rcl_duration_t:
     nanoseconds: int
 
 
-class rcl_subscription_event_type_t(IntEnum):
-    RCL_SUBSCRIPTION_REQUESTED_DEADLINE_MISSED: int
-    RCL_SUBSCRIPTION_LIVELINESS_CHANGED: int
-    RCL_SUBSCRIPTION_REQUESTED_INCOMPATIBLE_QOS: int
-    RCL_SUBSCRIPTION_MESSAGE_LOST: int
-    RCL_SUBSCRIPTION_INCOMPATIBLE_TYPE: int
-    RCL_SUBSCRIPTION_MATCHED: int
+class rcl_subscription_event_type_t(Enum):
+    _value_: int
+    RCL_SUBSCRIPTION_REQUESTED_DEADLINE_MISSED = ...
+    RCL_SUBSCRIPTION_LIVELINESS_CHANGED = ...
+    RCL_SUBSCRIPTION_REQUESTED_INCOMPATIBLE_QOS = ...
+    RCL_SUBSCRIPTION_MESSAGE_LOST = ...
+    RCL_SUBSCRIPTION_INCOMPATIBLE_TYPE = ...
+    RCL_SUBSCRIPTION_MATCHED = ...
 
 
-class rcl_publisher_event_type_t(IntEnum):
-    RCL_PUBLISHER_OFFERED_DEADLINE_MISSED: int
-    RCL_PUBLISHER_LIVELINESS_LOST: int
-    RCL_PUBLISHER_OFFERED_INCOMPATIBLE_QOS: int
-    RCL_PUBLISHER_INCOMPATIBLE_TYPE: int
-    RCL_PUBLISHER_MATCHED: int
+class rcl_publisher_event_type_t(Enum):
+    _value_: int
+    RCL_PUBLISHER_OFFERED_DEADLINE_MISSED = ...
+    RCL_PUBLISHER_LIVELINESS_LOST = ...
+    RCL_PUBLISHER_OFFERED_INCOMPATIBLE_QOS = ...
+    RCL_PUBLISHER_INCOMPATIBLE_TYPE = ...
+    RCL_PUBLISHER_MATCHED = ...
 
 
 class EventHandle(Destroyable):
@@ -135,6 +137,73 @@ class EventHandle(Destroyable):
         """Get pending data from a ready event."""
 
 
+LifecycleStateMachineState: TypeAlias = tuple[int, str]
+
+
+class LifecycleStateMachine(Destroyable):
+
+    def __init__(self, node: Node, enable_com_interface: bool) -> None: ...
+
+    @property
+    def initialized(self) -> bool:
+        """Check if state machine is initialized."""
+
+    @property
+    def current_state(self) -> LifecycleStateMachineState:
+        """Get the current state machine state."""
+
+    @property
+    def available_states(self) -> list[LifecycleStateMachineState]:
+        """Get the available states."""
+
+    @property
+    def available_transitions(self) -> list[tuple[int, str, int, str, int, str]]:
+        """Get the available transitions."""
+
+    @property
+    def transition_graph(self) -> list[tuple[int, str, int, str, int, str]]:
+        """Get the transition graph."""
+
+    def get_transition_by_label(self, label: str) -> int:
+        """Get the transition id from a transition label."""
+
+    def trigger_transition_by_id(self, transition_id: int, publish_update: bool) -> None:
+        """Trigger a transition by transition id."""
+
+    def trigger_transition_by_label(self, label: str, publish_update: bool) -> None:
+        """Trigger a transition by label."""
+
+    @property
+    def service_change_state(self) -> Service:
+        """Get the change state service."""
+
+    @property
+    def service_get_state(self) -> Service:
+        """Get the get state service."""
+
+    @property
+    def service_get_available_states(self) -> Service:
+        """Get the get available states service."""
+
+    @property
+    def service_get_available_transitions(self) -> Service:
+        """Get the get available transitions service."""
+
+    @property
+    def service_get_transition_graph(self) -> Service:
+        """Get the get transition graph service."""
+
+
+class TransitionCallbackReturnType(Enum):
+    _value_: int
+    SUCCESS = ...
+    FAILURE = ...
+    ERROR = ...
+
+    def to_label(self) -> str:
+        """Convert the transition callback return code to a transition label."""
+
+
 class GuardCondition(Destroyable):
 
     def __init__(self, context: Context) -> None: ...

rclpy/rclpy/lifecycle/managed_entity.py

@@ -13,63 +13,85 @@
 # limitations under the License.
 
 from functools import wraps
+from typing import Any, Callable, Dict, List, Optional, overload, TYPE_CHECKING, Union
 
 from ..impl.implementation_singleton import rclpy_implementation as _rclpy
 
+if TYPE_CHECKING:
+    from typing import TypeAlias
+    from rclpy.lifecycle.node import LifecycleState
 
-TransitionCallbackReturn = _rclpy.TransitionCallbackReturnType
+
+TransitionCallbackReturn: 'TypeAlias' = _rclpy.TransitionCallbackReturnType
 
 
 class ManagedEntity:
 
-    def on_configure(self, state) -> TransitionCallbackReturn:
+    def on_configure(self, state: 'LifecycleState') -> TransitionCallbackReturn:
         """Handle configure transition request."""
         return TransitionCallbackReturn.SUCCESS
 
-    def on_cleanup(self, state) -> TransitionCallbackReturn:
+    def on_cleanup(self, state: 'LifecycleState') -> TransitionCallbackReturn:
         """Handle cleanup transition request."""
         return TransitionCallbackReturn.SUCCESS
 
-    def on_shutdown(self, state) -> TransitionCallbackReturn:
+    def on_shutdown(self, state: 'LifecycleState') -> TransitionCallbackReturn:
         """Handle shutdown transition request."""
         return TransitionCallbackReturn.SUCCESS
 
-    def on_activate(self, state) -> TransitionCallbackReturn:
+    def on_activate(self, state: 'LifecycleState') -> TransitionCallbackReturn:
         """Handle activate transition request."""
         return TransitionCallbackReturn.SUCCESS
 
-    def on_deactivate(self, state) -> TransitionCallbackReturn:
+    def on_deactivate(self, state: 'LifecycleState') -> TransitionCallbackReturn:
         """Handle deactivate transition request."""
         return TransitionCallbackReturn.SUCCESS
 
-    def on_error(self, state) -> TransitionCallbackReturn:
+    def on_error(self, state: 'LifecycleState') -> TransitionCallbackReturn:
         """Handle error transition request."""
         return TransitionCallbackReturn.SUCCESS
 
 
 class SimpleManagedEntity(ManagedEntity):
     """A simple managed entity that only sets a flag when activated/deactivated."""
 
-    def __init__(self):
+    def __init__(self) -> None:
         self._enabled = False
 
-    def on_activate(self, state) -> TransitionCallbackReturn:
+    def on_activate(self, state: 'LifecycleState') -> TransitionCallbackReturn:
         self._enabled = True
         return TransitionCallbackReturn.SUCCESS
 
-    def on_deactivate(self, state) -> TransitionCallbackReturn:
+    def on_deactivate(self, state: 'LifecycleState') -> TransitionCallbackReturn:
         self._enabled = False
         return TransitionCallbackReturn.SUCCESS
 
     @property
-    def is_activated(self):
+    def is_activated(self) -> bool:
         return self._enabled
 
     @staticmethod
-    def when_enabled(wrapped=None, *, when_not_enabled=None):
-        def decorator(wrapped):
+    @overload
+    def when_enabled(wrapped: None, *,
+                     when_not_enabled: Optional[Callable[..., None]] = None
+                     ) -> Callable[[Callable[..., None]], Callable[..., None]]: ...
+
+    @staticmethod
+    @overload
+    def when_enabled(wrapped: Callable[..., None], *,
+                     when_not_enabled: Optional[Callable[..., None]] = None
+                     ) -> Callable[..., None]: ...
+
+    @staticmethod
+    def when_enabled(wrapped: Optional[Callable[..., None]] = None, *,
+                     when_not_enabled: Optional[Callable[..., None]] = None) -> Union[
+                         Callable[..., None],
+                         Callable[[Callable[..., None]], Callable[..., None]]
+                        ]:
+        def decorator(wrapped: Callable[..., None]) -> Callable[..., None]:
             @wraps(wrapped)
-            def only_when_enabled_wrapper(self: SimpleManagedEntity, *args, **kwargs):
+            def only_when_enabled_wrapper(self: SimpleManagedEntity, *args: List[Any],
+                                          **kwargs: Dict[str, Any]) -> None:
                 if not self._enabled:
                     if when_not_enabled is not None:
                         when_not_enabled()