59 lines
1.5 KiB
Python
59 lines
1.5 KiB
Python
import psycopg
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from psycopg.adapt import Loader, Dumper
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from psycopg.pq import Format
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from ..utils import Vector
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class VectorDumper(Dumper):
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format = Format.TEXT
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def dump(self, obj):
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return Vector._to_db(obj).encode('utf8')
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class VectorBinaryDumper(VectorDumper):
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format = Format.BINARY
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def dump(self, obj):
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return Vector._to_db_binary(obj)
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class VectorLoader(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 Vector._from_db(data.decode('utf8'))
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class VectorBinaryLoader(VectorLoader):
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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 Vector._from_db_binary(data)
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def register_vector_info(context, info):
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if info is None:
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raise psycopg.ProgrammingError('vector type not found in the database')
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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('', (VectorDumper,), {'oid': info.oid})
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binary_dumper = type('', (VectorBinaryDumper,), {'oid': info.oid})
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adapters = context.adapters
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adapters.register_dumper('numpy.ndarray', text_dumper)
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adapters.register_dumper('numpy.ndarray', binary_dumper)
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adapters.register_dumper(Vector, text_dumper)
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adapters.register_dumper(Vector, binary_dumper)
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adapters.register_loader(info.oid, VectorLoader)
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adapters.register_loader(info.oid, VectorBinaryLoader)
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