def MapTo(self, subject, key, value):
"""Map key-value pair to an objects attribute.
Args:
subject: _ObjectMapper of object that will receive new attribute.
key: Key of attribute.
value: Value of new attribute.
Raises:
UnexpectedAttribute when the key is not a validated attribute of
the subject value class.
"""
assert isinstance(subject.value, validation.ValidatedBase)
try:
attribute = subject.value.GetValidator(key)
except validation.ValidationError, err:
raise yaml_errors.UnexpectedAttribute(err)
def MapTo(self, subject, key, value):
"""Map key-value pair to an objects attribute.
Args:
subject: _ObjectMapper of object that will receive new attribute.
key: Key of attribute.
value: Value of new attribute.
Raises:
UnexpectedAttribute when the key is not a validated attribute of
the subject value class.
"""
assert isinstance(subject.value, validation.ValidatedBase)
try:
attribute = subject.value.GetValidator(key)
except validation.ValidationError as err:
raise yaml_errors.UnexpectedAttribute(err)
if isinstance(value, _ObjectMapper):
# Now know what class the new instance should be.
# Time to construct it from the attributes expected type.
value.set_value(attribute.expected_type())
value = value.value
elif isinstance(value, _ObjectSequencer):
# Now know what class new instances within the sequence should be.
value.set_constructor(self._GetRepeated(attribute))
value = value.value
subject.see(key)
try:
subject.value.Set(key, value)
except validation.ValidationError as e:
# Some errors may have problematic encoding or other issues.
# Re-raising an error in this block would be very hard to debug
# for the time being so instead, on error, the value is merely
# obscured.
try:
error_str = str(e)
except Exception:
error_str = '<unknown>'
try:
value_str = str(value)
except Exception:
value_str = '<unknown>'
# Update error message with a better message.
e.message = ("Unable to assign value '%s' to attribute '%s':\n%s" %
(value_str, key, error_str))
raise e
except Exception as e:
try:
error_str = str(e)
except Exception:
error_str = '<unknown>'
try:
value_str = str(value)
except Exception:
value_str = '<unknown>'
# Raise a more generic exception message.
message = ("Unable to assign value '%s' to attribute '%s':\n%s" %
(value_str, key, error_str))
raise validation.ValidationError(message, e)