def _Parse(self, pairs):
res = {}
for pair in pairs:
try:
parts = tokenizer.Tokenize(pair, [_KV_PAIR_DELIMITER])
except ValueError as e:
raise ArgumentParsingError(self, e.message)
if len(parts) != 3 or parts[1] != tokenizer.Separator(
_KV_PAIR_DELIMITER):
raise ArgumentParsingError(
self, _GenerateErrorMessage(
'key/value pair must be of the form KEY{0}VALUE'.format(
_KV_PAIR_DELIMITER),
user_input=pair))
key, value = parts[0], parts[2]
if key in res:
raise ArgumentParsingError(
self, _GenerateErrorMessage('duplicate key', user_input=key))
res[key] = self.ApplySpec(key, value)
return res
def _Parse(prop):
"""Parses the given tokens that represent a property."""
tokens = tokenizer.Tokenize(prop, ['[', ']', '.'])
tokens = [token for token in tokens if token]
if not tokens:
raise IllegalProperty('illegal property: {0}'.format(prop))
res = []
while tokens:
if not isinstance(tokens[0], tokenizer.Literal):
raise IllegalProperty('illegal property: {0}'.format(prop))
res.append(_Key(tokens[0]))
tokens = tokens[1:]
# At this point, we expect to be either at the end of the input
# stream or we expect to see a "." or "[".
# We've reached the end of the input stream.
if not tokens:
break
if not isinstance(tokens[0], tokenizer.Separator):
raise IllegalProperty('illegal property: {0}'.format(prop))
if isinstance(tokens[0], tokenizer.Separator) and tokens[0] == '[':
if len(tokens) < 2:
raise IllegalProperty('illegal property: {0}'.format(prop))
tokens = tokens[1:]
# Handles list slices (i.e., "[]").
if (isinstance(tokens[0], tokenizer.Separator)
and tokens[0] == ']'):
res.append(_Slice())
tokens = tokens[1:]
# Handles index accesses (e.g., "[1]").
elif (isinstance(tokens[0], tokenizer.Literal)
and tokens[0].isdigit() and len(tokens) >= 2
and isinstance(tokens[1], tokenizer.Separator)
and tokens[1] == ']'):
res.append(_Index(tokens[0]))
tokens = tokens[2:]
else:
raise IllegalProperty('illegal property: {0}'.format(prop))
# We've reached the end of input.
if not tokens:
break
# We expect a "."; we also expect that the "." is not the last
# token in the input.
if (len(tokens) > 1 and isinstance(tokens[0], tokenizer.Separator)
and tokens[0] == '.'):
tokens = tokens[1:]
continue
else:
raise IllegalProperty('illegal property: {0}'.format(prop))
return res