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_validators.py
from fractions import Fraction from urllib.parse import urldefrag, urljoin import re from jsonschema._utils import ( ensure_list, equal, extras_msg, find_additional_properties, find_evaluated_item_indexes_by_schema, find_evaluated_property_keys_by_schema, unbool, uniq, ) from jsonschema.exceptions import FormatError, ValidationError def patternProperties(validator, patternProperties, instance, schema): if not validator.is_type(instance, "object"): return for pattern, subschema in patternProperties.items(): for k, v in instance.items(): if re.search(pattern, k): yield from validator.descend( v, subschema, path=k, schema_path=pattern, ) def propertyNames(validator, propertyNames, instance, schema): if not validator.is_type(instance, "object"): return for property in instance: yield from validator.descend(instance=property, schema=propertyNames) def additionalProperties(validator, aP, instance, schema): if not validator.is_type(instance, "object"): return extras = set(find_additional_properties(instance, schema)) if validator.is_type(aP, "object"): for extra in extras: yield from validator.descend(instance[extra], aP, path=extra) elif not aP and extras: if "patternProperties" in schema: if len(extras) == 1: verb = "does" else: verb = "do" joined = ", ".join(repr(each) for each in sorted(extras)) patterns = ", ".join( repr(each) for each in sorted(schema["patternProperties"]) ) error = f"{joined} {verb} not match any of the regexes: {patterns}" yield ValidationError(error) else: error = "Additional properties are not allowed (%s %s unexpected)" yield ValidationError(error % extras_msg(extras)) def items(validator, items, instance, schema): if not validator.is_type(instance, "array"): return prefix = len(schema.get("prefixItems", [])) total = len(instance) if items is False and total > prefix: message = f"Expected at most {prefix} items, but found {total}" yield ValidationError(message) else: for index in range(prefix, total): yield from validator.descend( instance=instance[index], schema=items, path=index, ) def additionalItems(validator, aI, instance, schema): if ( not validator.is_type(instance, "array") or validator.is_type(schema.get("items", {}), "object") ): return len_items = len(schema.get("items", [])) if validator.is_type(aI, "object"): for index, item in enumerate(instance[len_items:], start=len_items): yield from validator.descend(item, aI, path=index) elif not aI and len(instance) > len(schema.get("items", [])): error = "Additional items are not allowed (%s %s unexpected)" yield ValidationError( error % extras_msg(instance[len(schema.get("items", [])):]), ) def const(validator, const, instance, schema): if not equal(instance, const): yield ValidationError(f"{const!r} was expected") def contains(validator, contains, instance, schema): if not validator.is_type(instance, "array"): return matches = 0 min_contains = schema.get("minContains", 1) max_contains = schema.get("maxContains", len(instance)) for each in instance: if validator.evolve(schema=contains).is_valid(each): matches += 1 if matches > max_contains: yield ValidationError( "Too many items match the given schema " f"(expected at most {max_contains})", validator="maxContains", validator_value=max_contains, ) return if matches < min_contains: if not matches: yield ValidationError( f"{instance!r} does not contain items " "matching the given schema", ) else: yield ValidationError( "Too few items match the given schema (expected at least " f"{min_contains} but only {matches} matched)", validator="minContains", validator_value=min_contains, ) def exclusiveMinimum(validator, minimum, instance, schema): if not validator.is_type(instance, "number"): return if instance <= minimum: yield ValidationError( f"{instance!r} is less than or equal to " f"the minimum of {minimum!r}", ) def exclusiveMaximum(validator, maximum, instance, schema): if not validator.is_type(instance, "number"): return if instance >= maximum: yield ValidationError( f"{instance!r} is greater than or equal " f"to the maximum of {maximum!r}", ) def minimum(validator, minimum, instance, schema): if not validator.is_type(instance, "number"): return if instance < minimum: message = f"{instance!r} is less than the minimum of {minimum!r}" yield ValidationError(message) def maximum(validator, maximum, instance, schema): if not validator.is_type(instance, "number"): return if instance > maximum: message = f"{instance!r} is greater than the maximum of {maximum!r}" yield ValidationError(message) def multipleOf(validator, dB, instance, schema): if not validator.is_type(instance, "number"): return if isinstance(dB, float): quotient = instance / dB try: failed = int(quotient) != quotient except OverflowError: # When `instance` is large and `dB` is less than one, # quotient can overflow to infinity; and then casting to int # raises an error. # # In this case we fall back to Fraction logic, which is # exact and cannot overflow. The performance is also # acceptable: we try the fast all-float option first, and # we know that fraction(dB) can have at most a few hundred # digits in each part. The worst-case slowdown is therefore # for already-slow enormous integers or Decimals. failed = (Fraction(instance) / Fraction(dB)).denominator != 1 else: failed = instance % dB if failed: yield ValidationError(f"{instance!r} is not a multiple of {dB}") def minItems(validator, mI, instance, schema): if validator.is_type(instance, "array") and len(instance) < mI: yield ValidationError(f"{instance!r} is too short") def maxItems(validator, mI, instance, schema): if validator.is_type(instance, "array") and len(instance) > mI: yield ValidationError(f"{instance!r} is too long") def uniqueItems(validator, uI, instance, schema): if ( uI and validator.is_type(instance, "array") and not uniq(instance) ): yield ValidationError(f"{instance!r} has non-unique elements") def pattern(validator, patrn, instance, schema): if ( validator.is_type(instance, "string") and not re.search(patrn, instance) ): yield ValidationError(f"{instance!r} does not match {patrn!r}") def format(validator, format, instance, schema): if validator.format_checker is not None: try: validator.format_checker.check(instance, format) except FormatError as error: yield ValidationError(error.message, cause=error.cause) def minLength(validator, mL, instance, schema): if validator.is_type(instance, "string") and len(instance) < mL: yield ValidationError(f"{instance!r} is too short") def maxLength(validator, mL, instance, schema): if validator.is_type(instance, "string") and len(instance) > mL: yield ValidationError(f"{instance!r} is too long") def dependentRequired(validator, dependentRequired, instance, schema): if not validator.is_type(instance, "object"): return for property, dependency in dependentRequired.items(): if property not in instance: continue for each in dependency: if each not in instance: message = f"{each!r} is a dependency of {property!r}" yield ValidationError(message) def dependentSchemas(validator, dependentSchemas, instance, schema): if not validator.is_type(instance, "object"): return for property, dependency in dependentSchemas.items(): if property not in instance: continue yield from validator.descend( instance, dependency, schema_path=property, ) def enum(validator, enums, instance, schema): if instance == 0 or instance == 1: unbooled = unbool(instance) if all(unbooled != unbool(each) for each in enums): yield ValidationError(f"{instance!r} is not one of {enums!r}") elif instance not in enums: yield ValidationError(f"{instance!r} is not one of {enums!r}") def ref(validator, ref, instance, schema): resolve = getattr(validator.resolver, "resolve", None) if resolve is None: with validator.resolver.resolving(ref) as resolved: yield from validator.descend(instance, resolved) else: scope, resolved = validator.resolver.resolve(ref) validator.resolver.push_scope(scope) try: yield from validator.descend(instance, resolved) finally: validator.resolver.pop_scope() def dynamicRef(validator, dynamicRef, instance, schema): _, fragment = urldefrag(dynamicRef) for url in validator.resolver._scopes_stack: lookup_url = urljoin(url, dynamicRef) with validator.resolver.resolving(lookup_url) as subschema: if ("$dynamicAnchor" in subschema and fragment == subschema["$dynamicAnchor"]): yield from validator.descend(instance, subschema) break else: with validator.resolver.resolving(dynamicRef) as subschema: yield from validator.descend(instance, subschema) def type(validator, types, instance, schema): types = ensure_list(types) if not any(validator.is_type(instance, type) for type in types): reprs = ", ".join(repr(type) for type in types) yield ValidationError(f"{instance!r} is not of type {reprs}") def properties(validator, properties, instance, schema): if not validator.is_type(instance, "object"): return for property, subschema in properties.items(): if property in instance: yield from validator.descend( instance[property], subschema, path=property, schema_path=property, ) def required(validator, required, instance, schema): if not validator.is_type(instance, "object"): return for property in required: if property not in instance: yield ValidationError(f"{property!r} is a required property") def minProperties(validator, mP, instance, schema): if validator.is_type(instance, "object") and len(instance) < mP: yield ValidationError(f"{instance!r} does not have enough properties") def maxProperties(validator, mP, instance, schema): if not validator.is_type(instance, "object"): return if validator.is_type(instance, "object") and len(instance) > mP: yield ValidationError(f"{instance!r} has too many properties") def allOf(validator, allOf, instance, schema): for index, subschema in enumerate(allOf): yield from validator.descend(instance, subschema, schema_path=index) def anyOf(validator, anyOf, instance, schema): all_errors = [] for index, subschema in enumerate(anyOf): errs = list(validator.descend(instance, subschema, schema_path=index)) if not errs: break all_errors.extend(errs) else: yield ValidationError( f"{instance!r} is not valid under any of the given schemas", context=all_errors, ) def oneOf(validator, oneOf, instance, schema): subschemas = enumerate(oneOf) all_errors = [] for index, subschema in subschemas: errs = list(validator.descend(instance, subschema, schema_path=index)) if not errs: first_valid = subschema break all_errors.extend(errs) else: yield ValidationError( f"{instance!r} is not valid under any of the given schemas", context=all_errors, ) more_valid = [ each for _, each in subschemas if validator.evolve(schema=each).is_valid(instance) ] if more_valid: more_valid.append(first_valid) reprs = ", ".join(repr(schema) for schema in more_valid) yield ValidationError(f"{instance!r} is valid under each of {reprs}") def not_(validator, not_schema, instance, schema): if validator.evolve(schema=not_schema).is_valid(instance): message = f"{instance!r} should not be valid under {not_schema!r}" yield ValidationError(message) def if_(validator, if_schema, instance, schema): if validator.evolve(schema=if_schema).is_valid(instance): if "then" in schema: then = schema["then"] yield from validator.descend(instance, then, schema_path="then") elif "else" in schema: else_ = schema["else"] yield from validator.descend(instance, else_, schema_path="else") def unevaluatedItems(validator, unevaluatedItems, instance, schema): if not validator.is_type(instance, "array"): return evaluated_item_indexes = find_evaluated_item_indexes_by_schema( validator, instance, schema, ) unevaluated_items = [ item for index, item in enumerate(instance) if index not in evaluated_item_indexes ] if unevaluated_items: error = "Unevaluated items are not allowed (%s %s unexpected)" yield ValidationError(error % extras_msg(unevaluated_items)) def unevaluatedProperties(validator, unevaluatedProperties, instance, schema): if not validator.is_type(instance, "object"): return evaluated_property_keys = find_evaluated_property_keys_by_schema( validator, instance, schema, ) unevaluated_property_keys = [] for property in instance: if property not in evaluated_property_keys: for _ in validator.descend( instance[property], unevaluatedProperties, path=property, schema_path=property, ): unevaluated_property_keys.append(property) if unevaluated_property_keys: error = "Unevaluated properties are not allowed (%s %s unexpected)" yield ValidationError(error % extras_msg(unevaluated_property_keys)) def prefixItems(validator, prefixItems, instance, schema): if not validator.is_type(instance, "array"): return for (index, item), subschema in zip(enumerate(instance), prefixItems): yield from validator.descend( instance=item, schema=subschema, schema_path=index, path=index, )
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