265 lines
6.5 KiB
Python
265 lines
6.5 KiB
Python
from collections import defaultdict, deque
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import itertools
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import pprint
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import textwrap
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from jsonschema import _utils
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from jsonschema.compat import PY3, iteritems
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WEAK_MATCHES = frozenset(["anyOf", "oneOf"])
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STRONG_MATCHES = frozenset()
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_unset = _utils.Unset()
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class _Error(Exception):
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def __init__(
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self,
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message,
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validator=_unset,
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path=(),
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cause=None,
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context=(),
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validator_value=_unset,
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instance=_unset,
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schema=_unset,
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schema_path=(),
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parent=None,
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):
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self.message = message
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self.path = self.relative_path = deque(path)
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self.schema_path = self.relative_schema_path = deque(schema_path)
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self.context = list(context)
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self.cause = self.__cause__ = cause
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self.validator = validator
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self.validator_value = validator_value
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self.instance = instance
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self.schema = schema
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self.parent = parent
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for error in context:
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error.parent = self
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def __repr__(self):
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return "<%s: %r>" % (self.__class__.__name__, self.message)
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def __str__(self):
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return unicode(self).encode("utf-8")
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def __unicode__(self):
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essential_for_verbose = (
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self.validator, self.validator_value, self.instance, self.schema,
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)
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if any(m is _unset for m in essential_for_verbose):
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return self.message
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pschema = pprint.pformat(self.schema, width=72)
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pinstance = pprint.pformat(self.instance, width=72)
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return self.message + textwrap.dedent("""
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Failed validating %r in schema%s:
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%s
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On instance%s:
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%s
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""".rstrip()
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) % (
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self.validator,
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_utils.format_as_index(list(self.relative_schema_path)[:-1]),
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_utils.indent(pschema),
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_utils.format_as_index(self.relative_path),
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_utils.indent(pinstance),
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)
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if PY3:
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__str__ = __unicode__
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@classmethod
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def create_from(cls, other):
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return cls(**other._contents())
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@property
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def absolute_path(self):
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parent = self.parent
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if parent is None:
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return self.relative_path
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path = deque(self.relative_path)
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path.extendleft(reversed(parent.absolute_path))
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return path
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@property
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def absolute_schema_path(self):
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parent = self.parent
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if parent is None:
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return self.relative_schema_path
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path = deque(self.relative_schema_path)
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path.extendleft(reversed(parent.absolute_schema_path))
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return path
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def _set(self, **kwargs):
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for k, v in iteritems(kwargs):
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if getattr(self, k) is _unset:
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setattr(self, k, v)
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def _contents(self):
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attrs = (
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"message", "cause", "context", "validator", "validator_value",
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"path", "schema_path", "instance", "schema", "parent",
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)
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return dict((attr, getattr(self, attr)) for attr in attrs)
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class ValidationError(_Error):
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pass
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class SchemaError(_Error):
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pass
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class RefResolutionError(Exception):
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pass
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class UnknownType(Exception):
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def __init__(self, type, instance, schema):
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self.type = type
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self.instance = instance
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self.schema = schema
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def __str__(self):
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return unicode(self).encode("utf-8")
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def __unicode__(self):
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pschema = pprint.pformat(self.schema, width=72)
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pinstance = pprint.pformat(self.instance, width=72)
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return textwrap.dedent("""
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Unknown type %r for validator with schema:
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%s
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While checking instance:
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%s
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""".rstrip()
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) % (self.type, _utils.indent(pschema), _utils.indent(pinstance))
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if PY3:
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__str__ = __unicode__
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class FormatError(Exception):
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def __init__(self, message, cause=None):
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super(FormatError, self).__init__(message, cause)
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self.message = message
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self.cause = self.__cause__ = cause
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def __str__(self):
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return self.message.encode("utf-8")
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def __unicode__(self):
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return self.message
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if PY3:
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__str__ = __unicode__
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class ErrorTree(object):
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"""
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ErrorTrees make it easier to check which validations failed.
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"""
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_instance = _unset
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def __init__(self, errors=()):
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self.errors = {}
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self._contents = defaultdict(self.__class__)
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for error in errors:
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container = self
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for element in error.path:
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container = container[element]
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container.errors[error.validator] = error
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self._instance = error.instance
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def __contains__(self, index):
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"""
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Check whether ``instance[index]`` has any errors.
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"""
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return index in self._contents
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def __getitem__(self, index):
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"""
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Retrieve the child tree one level down at the given ``index``.
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If the index is not in the instance that this tree corresponds to and
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is not known by this tree, whatever error would be raised by
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``instance.__getitem__`` will be propagated (usually this is some
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subclass of :class:`LookupError`.
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"""
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if self._instance is not _unset and index not in self:
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self._instance[index]
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return self._contents[index]
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def __setitem__(self, index, value):
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self._contents[index] = value
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def __iter__(self):
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"""
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Iterate (non-recursively) over the indices in the instance with errors.
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"""
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return iter(self._contents)
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def __len__(self):
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"""
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Same as :attr:`total_errors`.
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"""
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return self.total_errors
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def __repr__(self):
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return "<%s (%s total errors)>" % (self.__class__.__name__, len(self))
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@property
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def total_errors(self):
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"""
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The total number of errors in the entire tree, including children.
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"""
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child_errors = sum(len(tree) for _, tree in iteritems(self._contents))
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return len(self.errors) + child_errors
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def by_relevance(weak=WEAK_MATCHES, strong=STRONG_MATCHES):
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def relevance(error):
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validator = error.validator
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return -len(error.path), validator not in weak, validator in strong
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return relevance
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relevance = by_relevance()
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def best_match(errors, key=relevance):
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errors = iter(errors)
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best = next(errors, None)
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if best is None:
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return
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best = max(itertools.chain([best], errors), key=key)
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while best.context:
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best = min(best.context, key=key)
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return best
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