def test_mro():
class Foo(object):
def __init__(self, data):
self.data = data
class Bar(Foo):
pass
@adapter(Foo, str)
def to_string(obj, to_cls):
return 'Adapted to string'
bar = Bar('My string')
s = adapt.adapt(bar, str)
assert s == 'Adapted to string'
assert s == 'Adapted to string'
class Zip(object):
def __init__(self, data):
self.data = data
class Zam(Zip):
pass
@adapter(Foo, Zip)
def from_foo_to_zip(obj, to_cls):
return 'Adapted to zip'
s = adapt.adapt(bar, Zam)
assert s == 'Adapted to zip'
def test_mro():
class Foo(object):
def __init__(self, data):
self.data = data
class Bar(Foo):
pass
@adapter(Foo, str)
def to_string(obj, to_cls):
return 'Adapted to string'
bar = Bar('My string')
s = adapt.adapt(bar, str)
assert s == 'Adapted to string'
assert s == 'Adapted to string'
class Zip(object):
def __init__(self, data):
self.data = data
class Zam(Zip):
pass
@adapter(Foo, Zip)
def from_foo_to_zip(obj, to_cls):
return 'Adapted to zip'
s = adapt.adapt(bar, Zam)
assert s == 'Adapted to zip'
def adapt(self, value):
"""
Convert the `value` to the `self.type` for this :class:`Field`
"""
if value is None or value is Empty:
return value
if isinstance(value, self.type):
return value
elif hasattr(value, '__adapt__'):
# Use an object's own adapter to adapt.
try:
return value.__adapt__(self.type)
except TypeError:
pass
if hasattr(self.type, '__adapt__'):
# Try using the type's adapter
return self.type.__adapt__(value)
if self.__class__.__adapters__:
# Use a registered adapter
adapter = self.__class__.__adapters__.get(type(value), None)
if adapter:
return adapter(value)
try:
# Use generic adapters
return adapt(value, self.type)
except AdaptError:
pass
raise TypeError('Could not adapt %r to %r' % (value, self.type))
def adapt(self, value):
"""
Convert the `value` to the `self.type` for this :class:`Field`
"""
if value is None or value is Empty:
return value
if isinstance(value, self.type):
return value
elif hasattr(value, '__adapt__'):
# Use an object's own adapter to adapt.
try:
return value.__adapt__(self.type)
except TypeError as e:
pass
if hasattr(self.type, '__adapt__'):
# Try using the type's adapter
return self.type.__adapt__(value)
if self.__class__.__adapters__:
# Use a registered adapter
adapter = self.__class__.__adapters__.get(type(value), None)
if adapter:
return adapter(value)
try:
# Use generic adapters
return adapt(value, self.type)
except AdaptError:
pass
raise TypeError('Could not adapt %r to %r' % (value, self.type))
def adapt_all(cls, obj):
return (adapt(i, cls) for i in obj)
def adapt(cls, obj):
return adapt(obj, cls)
def adapt_all(cls, obj):
return (adapt(i, cls) for i in obj)
def adapt(cls, obj):
return adapt(obj, cls)
