54 lines
1.4 KiB
Python
54 lines
1.4 KiB
Python
from psycopg.adapt import Loader, Dumper
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from psycopg.pq import Format
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from ..utils import SparseVector
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class SparseVectorDumper(Dumper):
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format = Format.TEXT
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def dump(self, obj):
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return SparseVector._to_db(obj).encode('utf8')
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class SparseVectorBinaryDumper(SparseVectorDumper):
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format = Format.BINARY
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def dump(self, obj):
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return SparseVector._to_db_binary(obj)
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class SparseVectorLoader(Loader):
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format = Format.TEXT
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def load(self, data):
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if isinstance(data, memoryview):
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data = bytes(data)
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return SparseVector._from_db(data.decode('utf8'))
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class SparseVectorBinaryLoader(SparseVectorLoader):
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format = Format.BINARY
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def load(self, data):
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if isinstance(data, memoryview):
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data = bytes(data)
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return SparseVector._from_db_binary(data)
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def register_sparsevec_info(context, info):
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info.register(context)
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# add oid to anonymous class for set_types
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text_dumper = type('', (SparseVectorDumper,), {'oid': info.oid})
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binary_dumper = type('', (SparseVectorBinaryDumper,), {'oid': info.oid})
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adapters = context.adapters
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adapters.register_dumper(SparseVector, text_dumper)
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adapters.register_dumper(SparseVector, binary_dumper)
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adapters.register_loader(info.oid, SparseVectorLoader)
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adapters.register_loader(info.oid, SparseVectorBinaryLoader)
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