# 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.
from typing import Any, Dict, Callable
import xarray as xr
from .abc import MultiLevelDataset
from .lazy import LazyMultiLevelDataset
[docs]
class MappedMultiLevelDataset(LazyMultiLevelDataset):
def __init__(
self,
ml_dataset: MultiLevelDataset,
mapper_function: Callable[[xr.Dataset], xr.Dataset],
ds_id: str = None,
mapper_params: Dict[str, Any] = None,
):
""""""
super().__init__(ds_id=ds_id, parameters=mapper_params)
self._ml_dataset = ml_dataset
self._mapper_function = mapper_function
def _get_num_levels_lazily(self) -> int:
return self._ml_dataset.num_levels
def _get_dataset_lazily(
self, index: int, mapper_params: Dict[str, Any]
) -> xr.Dataset:
return self._mapper_function(
self._ml_dataset.get_dataset(index), **mapper_params
)
[docs]
def close(self):
self._ml_dataset.close()