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from psycopg.adapt import Loader, Dumper
from psycopg.pq import Format
from ..utils import HalfVector
class HalfVectorDumper(Dumper):
format = Format.TEXT
def dump(self, obj):
return HalfVector._to_db(obj).encode('utf8')
class HalfVectorBinaryDumper(HalfVectorDumper):
format = Format.BINARY
def dump(self, obj):
return HalfVector._to_db_binary(obj)
class HalfVectorLoader(Loader):
format = Format.TEXT
def load(self, data):
if isinstance(data, memoryview):
data = bytes(data)
return HalfVector._from_db(data.decode('utf8'))
class HalfVectorBinaryLoader(HalfVectorLoader):
format = Format.BINARY
def load(self, data):
if isinstance(data, memoryview):
data = bytes(data)
return HalfVector._from_db_binary(data)
def register_halfvec_info(context, info):
info.register(context)
# add oid to anonymous class for set_types
text_dumper = type('', (HalfVectorDumper,), {'oid': info.oid})
binary_dumper = type('', (HalfVectorBinaryDumper,), {'oid': info.oid})
adapters = context.adapters
adapters.register_dumper(HalfVector, text_dumper)
adapters.register_dumper(HalfVector, binary_dumper)
adapters.register_loader(info.oid, HalfVectorLoader)
adapters.register_loader(info.oid, HalfVectorBinaryLoader)
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