# Copyright 2021 MONAI Consortium
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Any, Dict, Hashable, KeysView, Optional
from .datastore import Datastore
[docs]class MemoryDatastore(Datastore):
def __init__(self, **kwargs: Dict):
self._storage: Dict = {}
[docs] def get(self, key: Hashable, def_val: Optional[Any] = None) -> Any:
return self._storage.get(key, None)
[docs] def put(self, key: Hashable, value: Any):
self._storage[key] = value
[docs] def delete(self, key: Hashable):
del self._storage[key]
[docs] def exists(self, key: Hashable) -> bool:
return key in self._storage
[docs] def size(self) -> int:
return len(self._storage)
[docs] def keys(self) -> KeysView:
return self._storage.keys()