def __init__(self, field_name, is_allowed_to_be_empty, length, rule, data_format):
super(ConstantFieldFormat, self).__init__(
field_name, is_allowed_to_be_empty, length, rule, data_format, empty_value='')
# Extract constant from rule tokens.
tokens = _tools.tokenize_without_space(rule)
toky = next(tokens)
if _tools.is_eof_token(toky):
# No rule means that the field must always be empty.
self._constant = ''
else:
self._constant = _tools.token_text(toky)
toky = next(tokens)
if not _tools.is_eof_token(toky):
raise errors.InterfaceError(
'constant rule must be a single Python token but also found: %s'
% _compat.text_repr(_tools.token_text(toky)))
has_empty_rule = (rule == '')
if self.is_allowed_to_be_empty and not has_empty_rule:
raise errors.InterfaceError(
'to describe a Constant that can be empty, use a Choice field with a single choice')
if not self.is_allowed_to_be_empty and has_empty_rule:
raise errors.InterfaceError(
'field must be marked as empty to describe a constant empty value')
try:
self.length.validate(
'rule of constant field %s' % _compat.text_repr(self.field_name), len(self._constant))
except errors.RangeValueError:
raise errors.InterfaceError(
'length is %s but must be %d to match constant %s'
% (self.length, len(self._constant), _compat.text_repr(self._constant)))
def __init__(self, field_name, is_allowed_to_be_empty, length, rule, data_format):
super(ConstantFieldFormat, self).__init__(
field_name, is_allowed_to_be_empty, length, rule, data_format, empty_value='')
# Extract constant from rule tokens.
tokens = _tools.tokenize_without_space(rule)
toky = next(tokens)
if _tools.is_eof_token(toky):
# No rule means that the field must always be empty.
self._constant = ''
else:
self._constant = _tools.token_text(toky)
toky = next(tokens)
if not _tools.is_eof_token(toky):
raise errors.InterfaceError(
_('constant rule must be a single Python token but also found: %s')
% _compat.text_repr(_tools.token_text(toky)))
has_empty_rule = (rule == '')
if self.is_allowed_to_be_empty and not has_empty_rule:
raise errors.InterfaceError(
_('to describe a Constant that can be empty, use a Choice field with a single choice'))
if not self.is_allowed_to_be_empty and has_empty_rule:
raise errors.InterfaceError(
_('field must be marked as empty to describe a constant empty value'))
try:
self.length.validate(
_('rule of constant field %s') % _compat.text_repr(self.field_name), len(self._constant))
except errors.RangeValueError:
raise errors.InterfaceError(
_('length is %s but must be %d to match constant %s')
% (self.length, len(self._constant), _compat.text_repr(self._constant)))
def generate_choices(rule):
choices = []
# Split rule into tokens, ignoring white space.
tokens = _tools.tokenize_without_space(rule)
# Extract choices from rule tokens.
# TODO: Handle comma after comma without choice.
# previous_toky = None
toky = next(tokens)
while not _tools.is_eof_token(toky):
if _tools.is_comma_token(toky):
# TODO: Handle comma after comma without choice.
# if previous_toky:
# previous_toky_text = previous_toky[1]
# else:
# previous_toky_text = None
pass
choice = _tools.token_text(toky)
choices.append(choice)
toky = next(tokens)
if not _tools.is_eof_token(toky):
# Process next choice after comma.
toky = next(tokens)
return choices
def __init__(self, field_name, is_allowed_to_be_empty, length, rule,
data_format):
super(ChoiceFieldFormat, self).__init__(field_name,
is_allowed_to_be_empty,
length,
rule,
data_format,
empty_value='')
self.choices = []
# Split rule into tokens, ignoring white space.
tokens = _tools.tokenize_without_space(rule)
# Extract choices from rule tokens.
previous_toky = None
toky = next(tokens)
while not _tools.is_eof_token(toky):
if _tools.is_comma_token(toky):
# Handle comma after comma without choice.
if previous_toky:
previous_toky_text = previous_toky[1]
else:
previous_toky_text = None
raise errors.InterfaceError(
"choice value must precede a comma (,) but found: %s" %
_compat.text_repr(previous_toky_text))
choice = _tools.token_text(toky)
if not choice:
raise errors.InterfaceError(
"choice field must be allowed to be empty instead of containing an empty choice"
)
self.choices.append(choice)
toky = next(tokens)
if not _tools.is_eof_token(toky):
if not _tools.is_comma_token(toky):
raise errors.InterfaceError(
"comma (,) must follow choice value %s but found: %s" %
(_compat.text_repr(choice), _compat.text_repr(
toky[1])))
# Process next choice after comma.
toky = next(tokens)
if _tools.is_eof_token(toky):
raise errors.InterfaceError(
"trailing comma (,) must be removed")
if not self.is_allowed_to_be_empty and not self.choices:
raise errors.InterfaceError(
"choice field without any choices must be allowed to be empty")
def __init__(self, field_name, is_allowed_to_be_empty, length, rule, data_format):
super(ChoiceFieldFormat, self).__init__(
field_name, is_allowed_to_be_empty, length, rule, data_format, empty_value='')
self.choices = []
# Split rule into tokens, ignoring white space.
tokens = _tools.tokenize_without_space(rule)
# Extract choices from rule tokens.
previous_toky = None
toky = next(tokens)
while not _tools.is_eof_token(toky):
if _tools.is_comma_token(toky):
# Handle comma after comma without choice.
if previous_toky:
previous_toky_text = previous_toky[1]
else:
previous_toky_text = None
raise errors.InterfaceError(
"choice value must precede a comma (,) but found: %s" % _compat.text_repr(previous_toky_text))
choice = _tools.token_text(toky)
if not choice:
raise errors.InterfaceError(
"choice field must be allowed to be empty instead of containing an empty choice")
self.choices.append(choice)
toky = next(tokens)
if not _tools.is_eof_token(toky):
if not _tools.is_comma_token(toky):
raise errors.InterfaceError(
"comma (,) must follow choice value %s but found: %s"
% (_compat.text_repr(choice), _compat.text_repr(toky[1])))
# Process next choice after comma.
toky = next(tokens)
if _tools.is_eof_token(toky):
raise errors.InterfaceError("trailing comma (,) must be removed")
if not self.is_allowed_to_be_empty and not self.choices:
raise errors.InterfaceError("choice field without any choices must be allowed to be empty")
