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"""
.. codeauthor:: Tsuyoshi Hombashi <tsuyoshi.hombashi@gmail.com>
"""
from ._checker import CheckerFactory, TypeCheckerBase, TypeCheckerDelegator
from ._common import isstring
class StringTypeCheckerStrictLevel0(TypeCheckerBase):
def is_instance(self):
return isstring(self._value)
def is_valid_after_convert(self, converted_value):
return isstring(converted_value)
def _is_null_string(self, value):
try:
value = value.strip()
except AttributeError:
return False
return len(value) == 0
class StringTypeCheckerStrictLevel1(StringTypeCheckerStrictLevel0):
def is_exclude_instance(self):
return not isstring(self._value)
class StringTypeCheckerStrictLevel2(StringTypeCheckerStrictLevel1):
def is_exclude_instance(self):
if super().is_exclude_instance():
return True
return self._is_null_string(self._value)
_string_factory = CheckerFactory(
checker_mapping={
0: StringTypeCheckerStrictLevel0,
1: StringTypeCheckerStrictLevel1,
2: StringTypeCheckerStrictLevel2,
}
)
class StringTypeChecker(TypeCheckerDelegator):
def __init__(self, value, strict_level):
super().__init__(value=value, checker_factory=_string_factory, strict_level=strict_level)
class NullStringTypeCheckerStrictLevel0(StringTypeCheckerStrictLevel0):
def is_instance(self):
return self._value is None
def is_valid_after_convert(self, converted_value):
return self._is_null_string(converted_value)
class NullStringTypeCheckerStrictLevel1(NullStringTypeCheckerStrictLevel0):
def is_instance(self):
return False
_null_string_factory = CheckerFactory(
checker_mapping={0: NullStringTypeCheckerStrictLevel0, 1: NullStringTypeCheckerStrictLevel1}
)
class NullStringTypeChecker(TypeCheckerDelegator):
def __init__(self, value, strict_level):
super().__init__(
value=value, checker_factory=_null_string_factory, strict_level=strict_level
)
|
