# Copyright (c) 2018-2024 by xcube team and contributors
# Permissions are hereby granted under the terms of the MIT License:
# https://opensource.org/licenses/MIT.
import collections.abc
from typing import Iterator, List
import zarr.storage
[docs]
class DiagnosticZarrStore(zarr.storage.Store):
"""A diagnostic Zarr store used for testing and investigating
behaviour of Zarr and xarray's Zarr backend.
Args:
store: Wrapped Zarr store.
"""
def __init__(self, store: collections.abc.MutableMapping):
self.store = store
self.records: List[str] = []
if hasattr(self.store, "listdir"):
self.listdir = self._listdir
if hasattr(self.store, "getsize"):
self.getsize = self._getsize
def _add_record(self, record: str):
self.records.append(record)
def _listdir(self, path: str = "") -> List[str]:
self._add_record(f"listdir({path!r})")
# noinspection PyUnresolvedReferences
return self.store.listdir(path=path)
def _getsize(self, key: str) -> int:
self._add_record(f"getsize({key!r})")
# noinspection PyUnresolvedReferences
return self.store.getsize(key)
[docs]
def keys(self):
self._add_record("keys()")
return self.store.keys()
def __setitem__(self, key: str, value: bytes) -> None:
self._add_record(f"__setitem__({key!r}, {type(value).__name__})")
self.store.__setitem__(key, value)
def __delitem__(self, key: str) -> None:
self._add_record(f"__delitem__({key!r})")
self.store.__delitem__(key)
def __getitem__(self, key: str) -> bytes:
self._add_record(f"__getitem__({key!r})")
return self.store.__getitem__(key)
def __len__(self) -> int:
self._add_record("__len__()")
return self.store.__len__()
def __iter__(self) -> Iterator[str]:
self._add_record("__iter__()")
return self.store.__iter__()