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# Copyright (c) 2022 by the xcube development team and contributors
#
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# copy of this software and associated documentation files (the "Software"),
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# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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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.
:param 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__()