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189 lines
7.7 KiB
Python
189 lines
7.7 KiB
Python
import decimal
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from .draft04 import CodeGeneratorDraft04, JSON_TYPE_TO_PYTHON_TYPE
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from .exceptions import JsonSchemaDefinitionException
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from .generator import enforce_list
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class CodeGeneratorDraft06(CodeGeneratorDraft04):
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FORMAT_REGEXS = dict(CodeGeneratorDraft04.FORMAT_REGEXS, **{
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'json-pointer': r'^(/(([^/~])|(~[01]))*)*\Z',
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'uri-reference': r'^(\w+:(\/?\/?))?[^#\\\s]*(#[^\\\s]*)?\Z',
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'uri-template': (
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r'^(?:(?:[^\x00-\x20\"\'<>%\\^`{|}]|%[0-9a-f]{2})|'
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r'\{[+#./;?&=,!@|]?(?:[a-z0-9_]|%[0-9a-f]{2})+'
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r'(?::[1-9][0-9]{0,3}|\*)?(?:,(?:[a-z0-9_]|%[0-9a-f]{2})+'
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r'(?::[1-9][0-9]{0,3}|\*)?)*\})*\Z'
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),
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})
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def __init__(self, definition, resolver=None, formats={}, use_default=True, use_formats=True, detailed_exceptions=True):
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super().__init__(definition, resolver, formats, use_default, use_formats, detailed_exceptions)
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self._json_keywords_to_function.update((
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('exclusiveMinimum', self.generate_exclusive_minimum),
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('exclusiveMaximum', self.generate_exclusive_maximum),
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('propertyNames', self.generate_property_names),
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('contains', self.generate_contains),
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('const', self.generate_const),
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))
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def _generate_func_code_block(self, definition):
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if isinstance(definition, bool):
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self.generate_boolean_schema()
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elif '$ref' in definition:
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# needed because ref overrides any sibling keywords
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self.generate_ref()
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else:
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self.run_generate_functions(definition)
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def generate_boolean_schema(self):
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"""
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Means that schema can be specified by boolean.
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True means everything is valid, False everything is invalid.
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"""
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if self._definition is True:
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self.l('pass')
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if self._definition is False:
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self.exc('{name} must not be there')
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def generate_type(self):
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"""
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Validation of type. Can be one type or list of types.
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Since draft 06 a float without fractional part is an integer.
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.. code-block:: python
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{'type': 'string'}
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{'type': ['string', 'number']}
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"""
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types = enforce_list(self._definition['type'])
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try:
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python_types = ', '.join(JSON_TYPE_TO_PYTHON_TYPE[t] for t in types)
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except KeyError as exc:
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raise JsonSchemaDefinitionException('Unknown type: {}'.format(exc))
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extra = ''
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if 'integer' in types:
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extra += ' and not (isinstance({variable}, float) and {variable}.is_integer())'.format(
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variable=self._variable,
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)
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if ('number' in types or 'integer' in types) and 'boolean' not in types:
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extra += ' or isinstance({variable}, bool)'.format(variable=self._variable)
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with self.l('if not isinstance({variable}, ({})){}:', python_types, extra):
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self.exc('{name} must be {}', ' or '.join(types), rule='type')
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def generate_exclusive_minimum(self):
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with self.l('if isinstance({variable}, (int, float, Decimal)):'):
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if not isinstance(self._definition['exclusiveMinimum'], (int, float, decimal.Decimal)):
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raise JsonSchemaDefinitionException('exclusiveMinimum must be an integer, a float or a decimal')
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with self.l('if {variable} <= {exclusiveMinimum}:'):
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self.exc('{name} must be bigger than {exclusiveMinimum}', rule='exclusiveMinimum')
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def generate_exclusive_maximum(self):
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with self.l('if isinstance({variable}, (int, float, Decimal)):'):
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if not isinstance(self._definition['exclusiveMaximum'], (int, float, decimal.Decimal)):
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raise JsonSchemaDefinitionException('exclusiveMaximum must be an integer, a float or a decimal')
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with self.l('if {variable} >= {exclusiveMaximum}:'):
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self.exc('{name} must be smaller than {exclusiveMaximum}', rule='exclusiveMaximum')
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def generate_property_names(self):
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"""
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Means that keys of object must to follow this definition.
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.. code-block:: python
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{
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'propertyNames': {
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'maxLength': 3,
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},
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}
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Valid keys of object for this definition are foo, bar, ... but not foobar for example.
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"""
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property_names_definition = self._definition.get('propertyNames', {})
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if property_names_definition is True:
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pass
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elif property_names_definition is False:
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self.create_variable_keys()
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with self.l('if {variable}_keys:'):
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self.exc('{name} must not be there', rule='propertyNames')
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else:
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self.create_variable_is_dict()
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with self.l('if {variable}_is_dict:'):
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self.create_variable_with_length()
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with self.l('if {variable}_len != 0:'):
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self.l('{variable}_property_names = True')
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with self.l('for {variable}_key in {variable}:'):
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with self.l('try:'):
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self.generate_func_code_block(
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property_names_definition,
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'{}_key'.format(self._variable),
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self._variable_name,
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clear_variables=True,
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)
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with self.l('except JsonSchemaValueException:'):
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self.l('{variable}_property_names = False')
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with self.l('if not {variable}_property_names:'):
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self.exc('{name} must be named by propertyName definition', rule='propertyNames')
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def generate_contains(self):
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"""
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Means that array must contain at least one defined item.
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.. code-block:: python
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{
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'contains': {
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'type': 'number',
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},
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}
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Valid array is any with at least one number.
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"""
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self.create_variable_is_list()
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with self.l('if {variable}_is_list:'):
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contains_definition = self._definition['contains']
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if contains_definition is False:
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self.exc('{name} is always invalid', rule='contains')
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elif contains_definition is True:
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with self.l('if not {variable}:'):
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self.exc('{name} must not be empty', rule='contains')
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else:
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self.l('{variable}_contains = False')
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with self.l('for {variable}_key in {variable}:'):
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with self.l('try:'):
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self.generate_func_code_block(
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contains_definition,
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'{}_key'.format(self._variable),
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self._variable_name,
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clear_variables=True,
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)
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self.l('{variable}_contains = True')
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self.l('break')
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self.l('except JsonSchemaValueException: pass')
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with self.l('if not {variable}_contains:'):
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self.exc('{name} must contain one of contains definition', rule='contains')
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def generate_const(self):
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"""
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Means that value is valid when is equeal to const definition.
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.. code-block:: python
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{
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'const': 42,
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}
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Only valid value is 42 in this example.
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"""
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const = self._definition['const']
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if isinstance(const, str):
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const = '"{}"'.format(self.e(const))
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with self.l('if {variable} != {}:', const):
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self.exc('{name} must be same as const definition: {definition_rule}', rule='const')
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