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61 lines
2.1 KiB
Python
61 lines
2.1 KiB
Python
"""
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Code to decode, for testing purposes, the flatbuffer encoded blobs.
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This code will need to be updated if fbs/matrix.fbs changes.
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For more information, see fbs/matrix.fbs and server/data_common/fbs/
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"""
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import json
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import server.data_common.fbs.NetEncoding.Float32Array as Float32Array
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import server.data_common.fbs.NetEncoding.Float64Array as Float64Array
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import server.data_common.fbs.NetEncoding.Int32Array as Int32Array
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import server.data_common.fbs.NetEncoding.JSONEncodedArray as JSONEncodedArray
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import server.data_common.fbs.NetEncoding.Matrix as Matrix
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import server.data_common.fbs.NetEncoding.TypedArray as TypedArray
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import server.data_common.fbs.NetEncoding.Uint32Array as Uint32Array
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def decode_typed_array(tarr):
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type_map = {
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TypedArray.TypedArray.Uint32Array: Uint32Array.Uint32Array,
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TypedArray.TypedArray.Int32Array: Int32Array.Int32Array,
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TypedArray.TypedArray.Float32Array: Float32Array.Float32Array,
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TypedArray.TypedArray.Float64Array: Float64Array.Float64Array,
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TypedArray.TypedArray.JSONEncodedArray: JSONEncodedArray.JSONEncodedArray,
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}
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(u_type, u) = tarr
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if u_type == TypedArray.TypedArray.NONE:
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return None
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TarType = type_map.get(u_type, None)
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assert TarType is not None
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arr = TarType()
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arr.Init(u.Bytes, u.Pos)
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narr = arr.DataAsNumpy()
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if u_type == TypedArray.TypedArray.JSONEncodedArray:
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narr = json.loads(narr.tostring().decode("utf-8"))
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return narr
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def decode_matrix_FBS(buf):
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"""
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Given a FBS Matrix, return an decoded Python dict containing
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same info in native format.
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NOTE / TODO: row_idx not currently implemented
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"""
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df = Matrix.Matrix.GetRootAsMatrix(buf, 0)
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n_rows = df.NRows()
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n_cols = df.NCols()
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columns_length = df.ColumnsLength()
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decoded_columns = []
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for col_idx in range(0, columns_length):
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col = df.Columns(col_idx)
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tarr = (col.UType(), col.U())
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decoded_columns.append(decode_typed_array(tarr))
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cidx = decode_typed_array((df.ColIndexType(), df.ColIndex()))
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return {"n_rows": n_rows, "n_cols": n_cols, "columns": decoded_columns, "col_idx": cidx, "row_idx": None}
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