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# Copyright (C) 2016-present the asyncpg authors and contributors
# <see AUTHORS file>
#
# This module is part of asyncpg and is released under
# the Apache 2.0 License: http://www.apache.org/licenses/LICENSE-2.0
import collections
from asyncpg.pgproto.types import (
BitString, Point, Path, Polygon,
Box, Line, LineSegment, Circle,
)
__all__ = (
'Type', 'Attribute', 'Range', 'BitString', 'Point', 'Path', 'Polygon',
'Box', 'Line', 'LineSegment', 'Circle', 'ServerVersion',
)
Type = collections.namedtuple('Type', ['oid', 'name', 'kind', 'schema'])
Type.__doc__ = 'Database data type.'
Type.oid.__doc__ = 'OID of the type.'
Type.name.__doc__ = 'Type name. For example "int2".'
Type.kind.__doc__ = \
'Type kind. Can be "scalar", "array", "composite" or "range".'
Type.schema.__doc__ = 'Name of the database schema that defines the type.'
Attribute = collections.namedtuple('Attribute', ['name', 'type'])
Attribute.__doc__ = 'Database relation attribute.'
Attribute.name.__doc__ = 'Attribute name.'
Attribute.type.__doc__ = 'Attribute data type :class:`asyncpg.types.Type`.'
ServerVersion = collections.namedtuple(
'ServerVersion', ['major', 'minor', 'micro', 'releaselevel', 'serial'])
ServerVersion.__doc__ = 'PostgreSQL server version tuple.'
class Range:
"""Immutable representation of PostgreSQL `range` type."""
__slots__ = '_lower', '_upper', '_lower_inc', '_upper_inc', '_empty'
def __init__(self, lower=None, upper=None, *,
lower_inc=True, upper_inc=False,
empty=False):
self._empty = empty
if empty:
self._lower = self._upper = None
self._lower_inc = self._upper_inc = False
else:
self._lower = lower
self._upper = upper
self._lower_inc = lower is not None and lower_inc
self._upper_inc = upper is not None and upper_inc
@property
def lower(self):
return self._lower
@property
def lower_inc(self):
return self._lower_inc
@property
def lower_inf(self):
return self._lower is None and not self._empty
@property
def upper(self):
return self._upper
@property
def upper_inc(self):
return self._upper_inc
@property
def upper_inf(self):
return self._upper is None and not self._empty
@property
def isempty(self):
return self._empty
def _issubset_lower(self, other):
if other._lower is None:
return True
if self._lower is None:
return False
return self._lower > other._lower or (
self._lower == other._lower
and (other._lower_inc or not self._lower_inc)
)
def _issubset_upper(self, other):
if other._upper is None:
return True
if self._upper is None:
return False
return self._upper < other._upper or (
self._upper == other._upper
and (other._upper_inc or not self._upper_inc)
)
def issubset(self, other):
if self._empty:
return True
if other._empty:
return False
return self._issubset_lower(other) and self._issubset_upper(other)
def issuperset(self, other):
return other.issubset(self)
def __bool__(self):
return not self._empty
def __eq__(self, other):
if not isinstance(other, Range):
return NotImplemented
return (
self._lower,
self._upper,
self._lower_inc,
self._upper_inc,
self._empty
) == (
other._lower,
other._upper,
other._lower_inc,
other._upper_inc,
other._empty
)
def __hash__(self):
return hash((
self._lower,
self._upper,
self._lower_inc,
self._upper_inc,
self._empty
))
def __repr__(self):
if self._empty:
desc = 'empty'
else:
if self._lower is None or not self._lower_inc:
lb = '('
else:
lb = '['
if self._lower is not None:
lb += repr(self._lower)
if self._upper is not None:
ub = repr(self._upper)
else:
ub = ''
if self._upper is None or not self._upper_inc:
ub += ')'
else:
ub += ']'
desc = '{}, {}'.format(lb, ub)
return '<Range {}>'.format(desc)
__str__ = __repr__
|
