Source code for medkit.core.store
__all__ = ["Store", "GlobalStore"]
from typing import Dict, Optional, Union
from typing_extensions import Protocol, runtime_checkable
from medkit.core.data_item import IdentifiableDataItem
[docs]@runtime_checkable
class Store(Protocol):
"""Store protocol"""
def store_data_item(self, data_item: IdentifiableDataItem, parent_id: str):
pass
def get_data_item(self, data_item_id: str) -> Optional[IdentifiableDataItem]:
pass
def get_parent_item(self, data_item) -> Optional[IdentifiableDataItem]:
pass
class _DictStore:
def __init__(self) -> None:
self._data_items_by_id: Dict[str, IdentifiableDataItem] = {}
self._parent_ids_by_id: Dict[str, str] = {}
def store_data_item(self, data_item: IdentifiableDataItem, parent_id: str):
self._data_items_by_id[data_item.uid] = data_item
self._parent_ids_by_id[data_item.uid] = parent_id
def get_data_item(self, data_item_id: str) -> Optional[IdentifiableDataItem]:
return self._data_items_by_id.get(data_item_id)
def get_parent_item(self, data_item_id: str) -> Optional[IdentifiableDataItem]:
parent_id = self._parent_ids_by_id[data_item_id]
return self._data_items_by_id.get(parent_id)
[docs]class GlobalStore:
"""Global store"""
_store: Union[Store, None] = None
[docs] @classmethod
def init_store(cls, store: Store):
"""
Initialize the global store for your application
Parameters
----------
store
Store for all the data items
Raises
------
RuntimeError
If global store is already set
"""
if cls._store is None:
cls._store = store
else:
raise RuntimeError(
"The global store has already been initialized. If it was not your"
" intention, please put this line at the beginning of your script to"
" make sure to set global store before any other initialization"
)
[docs] @classmethod
def get_store(cls) -> Store:
"""
Returns the global store object
Returns
-------
Store
the global store
"""
if cls._store is None:
cls._store = _DictStore()
return cls._store