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https://github.com/slsdetectorgroup/aare.git
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68 lines
2.2 KiB
Python
68 lines
2.2 KiB
Python
import json
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from typing import Any
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import _aare
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import os
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class File:
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"""
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File class. uses proxy pattern to wrap around the pybinding class
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abstracts the python binding class that is requires type and detector information
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(e.g. _FileHandler_Jungfrau_16)
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"""
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def __init__(self, path):
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"""
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opens the master file and checks the dynamic range and detector
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"""
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self.path = path
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# check if file exists
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if not os.path.exists(path):
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raise FileNotFoundError(f"File not found: {path}")
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ext = os.path.splitext(path)[1]
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if ext not in (".raw", ".json", ".npy"):
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raise ValueError(f"Invalid file extension: {ext}")
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if ext == ".json":
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# read the master file and get the detector and bitdepth
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master_data = json.load(open(path))
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detector = master_data["Detector Type"]
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bitdepth = None
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if 'Dynamic Range' not in master_data and detector == "Jungfrau":
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bitdepth = 16
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else:
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bitdepth = master_data["Dynamic Range"]
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elif ext == ".npy":
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# TODO: find solution for this. maybe add a None detector type
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detector = "Jungfrau"
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with open(path, "rb") as fobj:
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import numpy as np
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version = np.lib.format.read_magic(fobj)
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# find what function to call based on the version
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func_name = 'read_array_header_' + '_'.join(str(v) for v in version)
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func = getattr(np.lib.format, func_name)
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header = func(fobj)
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bitdepth = header[2].itemsize * 8
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else:
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NotImplementedError("Raw file not implemented yet")
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# class_name is of the form _FileHandler_Jungfrau_16...
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class_name = f"_FileHandler_{detector}_{bitdepth}"
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# this line is the equivalent of:
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# self._file = _FileHandler_Jungfrau_16(path)
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self._file = getattr(_aare, class_name)(path)
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def __getattribute__(self, __name: str) -> Any:
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"""
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Proxy pattern to call the methods of the _file
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"""
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return getattr(object.__getattribute__(self, "_file"), __name)
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