runtime.src.rosetta.runtime.utils.py Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of python Show documentation
Show all versions of python Show documentation
Generators to create python for rosetta
'''Utility functions (runtime) for rosetta models.'''
from __future__ import annotations
import logging as log
import keyword
from enum import Enum
from typing import get_args, get_origin
from typing import TypeVar, Generic, Callable, Any
from functools import wraps
from collections import defaultdict
from pydantic import BaseModel, ValidationError, ConfigDict
__all__ = ['if_cond', 'if_cond_fn', 'Multiprop', 'rosetta_condition',
'BaseDataClass', 'ConditionViolationError', 'any_elements',
'get_only_element', 'rosetta_filter',
'all_elements', 'contains', 'disjoint', 'join',
'rosetta_local_condition',
'execute_local_conditions',
'flatten_list',
'rosetta_resolve_attr',
'rosetta_count',
'rosetta_attr_exists',
'_get_rosetta_object',
'set_rosetta_attr',
'add_rosetta_attr',
'check_cardinality',
'AttributeWithMeta',
'AttributeWithAddress',
'AttributeWithReference',
'AttributeWithMetaWithAddress',
'AttributeWithMetaWithReference',
'AttributeWithAddressWithReference',
'AttributeWithMetaWithAddressWithReference',
'rosetta_str']
def if_cond(ifexpr, thenexpr: str, elseexpr: str, obj: object):
'''A helper to return the value of the ternary operator.'''
expr = thenexpr if ifexpr else elseexpr
return eval(expr, globals(), {'self': obj}) # pylint: disable=eval-used
def if_cond_fn(ifexpr, thenexpr: Callable, elseexpr: Callable) -> Any:
''' A helper to return the value of the ternary operator
(functional version).
'''
expr = thenexpr if ifexpr else elseexpr
return expr()
def _to_list(obj) -> list | tuple:
if isinstance(obj, (list, tuple)):
return obj
return (obj,)
def _is_meta(obj: Any) -> bool:
'''Returns true if it is a meta data with embedded rosetta type.'''
return isinstance(
obj, (AttributeWithMeta, AttributeWithAddress,
AttributeWithMetaWithAddress, AttributeWithMetaWithReference,
AttributeWithMetaWithAddressWithReference))
def mangle_name(attrib: str) -> str:
''' Mangle any attrib that is a Python keyword, is a Python soft keyword
or begins with _
'''
if (keyword.iskeyword(attrib) or keyword.issoftkeyword(attrib)
or attrib.startswith('_')):
return 'rosetta_attr_' + attrib
return attrib
def rosetta_resolve_attr(obj: Any | None,
attrib: str) -> Any | list[Any] | None:
''' Rosetta semantics compliant attribute resolver.
Lists and mangled attributes are treated as defined by
the rosetta definition (list flattening).
'''
if obj is None:
return None
if isinstance(obj, (list, tuple)):
res = [
item for elem in obj
for item in _to_list(rosetta_resolve_attr(elem, attrib))
if item is not None
]
return res if res else None
if _is_meta(obj):
# NOTE: ignores (for now) all meta attributes in the expressions.
# In the future one might want to check if the attrib is contained
# in the metadata and return it instead of failing.
obj = obj.value
attrib = mangle_name(attrib)
return getattr(obj, attrib, None)
def rosetta_count(obj: Any | None) -> int:
'''Implements the lose count semantics of the rosetta DSL'''
if not obj:
return 0
try:
return len(obj)
except TypeError:
return 1
def rosetta_attr_exists(val: Any) -> bool:
'''Implements the Rosetta semantics of property existence'''
if val is None or val == []:
return False
return True
def rosetta_str(x: Any) -> str:
'''Returns a Rosetta conform string representation'''
if isinstance(x, Enum):
x = x.value
return str(x)
def _get_rosetta_object(base_model: str, attribute: str, value: Any) -> Any:
model_class = globals()[base_model]
instance_kwargs = {attribute: value}
instance = model_class(**instance_kwargs)
return instance
class Multiprop(list):
''' A class allowing for dot access to a attribute of all elements of a
list.
'''
def __getattr__(self, attr):
# return multiprop(getattr(x, attr) for x in self)
res = Multiprop()
for x in self:
if isinstance(x, Multiprop):
res.extend(x.__getattr__(attr))
else:
res.append(getattr(x, attr))
return res
_CONDITIONS_REGISTRY: defaultdict[str, dict[str, Any]] = defaultdict(dict)
def rosetta_condition(condition):
'''Wrapper to register all constraint functions in the global registry'''
path_components = condition.__qualname__.split('.')
path = '.'.join([condition.__module__ or ''] + path_components[:-1])
name = path_components[-1]
_CONDITIONS_REGISTRY[path][name] = condition
@wraps(condition)
def wrapper(*args, **kwargs):
return condition(*args, **kwargs)
return wrapper
def rosetta_local_condition(registry: dict):
'''Registers a condition function in a local registry.'''
def decorator(condition):
path_components = condition.__qualname__.split('.')
path = '.'.join([condition.__module__ or ''] + path_components)
registry[path] = condition
@wraps(condition)
def wrapper(*args, **kwargs):
return condition(*args, **kwargs)
return wrapper
return decorator
def execute_local_conditions(registry: dict, cond_type: str):
'''Executes all registered in a local registry.'''
for condition_path, condition_func in registry.items():
if not condition_func():
raise ConditionViolationError(
f"{cond_type} '{condition_path}' failed.")
class ConditionViolationError(ValueError):
'''Exception thrown on violation of a constraint'''
def _fqcn(cls) -> str:
return '.'.join([cls.__module__ or '', cls.__qualname__])
def _get_conditions(cls) -> list:
res = []
index = cls.__mro__.index(BaseDataClass)
for c in reversed(cls.__mro__[:index]):
fqcn = _fqcn(c)
res += [('.'.join([fqcn, k]), v)
for k, v in _CONDITIONS_REGISTRY.get(fqcn, {}).items()]
return res
class MetaAddress(BaseModel): # pylint: disable=missing-class-docstring
scope: str
value: str
class BaseDataClass(BaseModel):
''' A base class for all cdm generated classes. It is derived from
`pydantic.BaseModel` which provides type checking at object creation
for all cdm classes. It provides as well the `validate_model`,
`validate_conditions` and `validate_attribs` methods which perform the
conditions, cardinality and type checks as specified in the rosetta
type model. The method `validate_model` is not invoked automatically,
but is left to the user to determine when to check the validity of the
cdm model.
'''
model_config = ConfigDict(extra='forbid', revalidate_instances='always')
meta: dict | None = None
address: MetaAddress | None = None
def validate_model(self,
recursively: bool = True,
raise_exc: bool = True,
strict: bool = True) -> list:
''' This method performs full model validation. It will validate all
attributes and it will also invoke `validate_conditions` to check
all conditions and the cardinality of all attributes of this object.
The parameter `raise_exc` controls whether an exception should be
thrown if a validation or condition is violated or if a list with
all encountered violations should be returned instead.
'''
att_errors = self.validate_attribs(raise_exc=raise_exc, strict=strict)
return att_errors + self.validate_conditions(recursively=recursively,
raise_exc=raise_exc)
def validate_attribs(self, raise_exc: bool = True, strict: bool = True) -> list:
''' This method performs attribute type validation.
The parameter `raise_exc` controls whether an exception should be
thrown if a validation or condition is violated or if a list with
all encountered violations should be returned instead.
'''
try:
self.model_validate(self, strict=strict)
except ValidationError as validation_error:
if raise_exc and validation_error:
raise validation_error
return [validation_error]
return []
def validate_conditions(self,
recursively: bool = True,
raise_exc: bool = True) -> list:
''' This method will check all conditions and the cardinality of all
attributes of this object. This includes conditions and cardinality
of properties specified in the base classes. If the parameter
`recursively` is set to `True`, it will invoke the validation on the
rosetta defined attributes of this object too.
The parameter `raise_exc` controls whether an exception should be
thrown if a condition is not met or if a list with all encountered
condition violations should be returned instead.
'''
self_rep = object.__repr__(self)
log.info('Checking conditions for %s ...', self_rep)
exceptions = []
for name, condition in _get_conditions(self.__class__):
log.info('Checking condition %s for %s...', name, self_rep)
if not condition(self):
msg = f'Condition "{name}" for {repr(self)} failed!'
log.error(msg)
exc = ConditionViolationError(msg)
if raise_exc:
raise exc
exceptions.append(exc)
else:
log.info('Condition %s for %s satisfied.', name, self_rep)
if recursively:
for k, v in self.__dict__.items():
log.info('Validating conditions of property %s', k)
exceptions += _validate_conditions_recursively(
v, raise_exc=raise_exc)
err = f'with {len(exceptions)}' if exceptions else 'without'
log.info('Done conditions checking for %s %s errors.', self_rep, err)
return exceptions
def check_one_of_constraint(self, *attr_names, necessity=True) -> bool:
""" Checks that one and only one attribute is set. """
values = self.model_dump()
vals = [values.get(n) for n in attr_names]
n_attr = sum(1 for v in vals if v is not None and v != [])
if necessity and n_attr != 1:
log.error('One and only one of %s should be set!', attr_names)
return False
if not necessity and n_attr > 1:
log.error('Only one of %s can be set!', attr_names)
return False
return True
def add_to_list_attribute(self, attr_name: str, value) -> None:
"""
Adds a value to a list attribute, ensuring the value is of an allowed
type.
Parameters:
attr_name (str): Name of the list attribute.
value: Value to add to the list.
Raises:
AttributeError: If the attribute name is not found or not a list.
TypeError: If the value type is not one of the allowed types.
"""
if not hasattr(self, attr_name):
raise AttributeError(f"Attribute {attr_name} not found.")
attr = getattr(self, attr_name)
if not isinstance(attr, list):
raise AttributeError(f"Attribute {attr_name} is not a list.")
# Get allowed types for the list elements
allowed_types = get_allowed_types_for_list_field(
self.__class__, attr_name)
# Check if value is an instance of one of the allowed types
if not isinstance(value, allowed_types):
raise TypeError(
f"Value must be an instance of {allowed_types}, "
f"not {type(value)}"
)
attr.append(value)
def _validate_conditions_recursively(obj, raise_exc=True):
'''Helper to execute conditions recursively on a model.'''
if not obj:
return []
if isinstance(obj, BaseDataClass):
return obj.validate_conditions(recursively=True, # type:ignore
raise_exc=raise_exc)
if isinstance(obj, (list, tuple)):
exc = []
for item in obj:
exc += _validate_conditions_recursively(item, raise_exc=raise_exc)
return exc
if _is_meta(obj):
return _validate_conditions_recursively(obj.value, raise_exc=raise_exc)
return []
def get_allowed_types_for_list_field(model_class: type, field_name: str):
"""
Gets the allowed types for a list field in a Pydantic model, supporting
both Union and | operator.
Parameters:
model_class (type): The Pydantic model class.
field_name (str): The field name.
Returns:
tuple: A tuple of allowed types.
"""
field_type = model_class.__annotations__.get(field_name)
if field_type and get_origin(field_type) is list:
list_elem_type = get_args(field_type)[0]
if get_origin(list_elem_type):
return get_args(list_elem_type)
return (list_elem_type,) # Single type or | operator used
return ()
ValueT = TypeVar('ValueT')
class AttributeWithMeta(BaseModel, Generic[ValueT]):
'''Meta support'''
meta: dict | None = None
value: ValueT
class AttributeWithAddress(BaseModel, Generic[ValueT]):
'''Meta support'''
address: MetaAddress | None = None
value: ValueT | None = None
class AttributeWithReference(BaseDataClass):
'''Meta support'''
externalReference: str | None = None
globalReference: str | None = None
class AttributeWithMetaWithAddress(BaseModel, Generic[ValueT]):
'''Meta support'''
meta: dict | None = None
address: MetaAddress | None = None
value: ValueT
class AttributeWithMetaWithReference(BaseModel, Generic[ValueT]):
'''Meta support'''
meta: dict | None = None
externalReference: str | None = None
globalReference: str | None = None
value: ValueT
class AttributeWithAddressWithReference(BaseModel, Generic[ValueT]):
'''Meta support'''
address: MetaAddress | None = None
externalReference: str | None = None
globalReference: str | None = None
value: ValueT
class AttributeWithMetaWithAddressWithReference(BaseModel, Generic[ValueT]):
'''Meta support'''
meta: dict | None = None
address: MetaAddress | None = None
externalReference: str | None = None
globalReference: str | None = None
value: ValueT
def _ntoz(v):
'''Support the lose rosetta treatment of None in comparisons'''
if v is None:
return 0
return v
_cmp = {
'=': lambda x, y: _ntoz(x) == _ntoz(y),
'<>': lambda x, y: _ntoz(x) != _ntoz(y),
'>=': lambda x, y: _ntoz(x) >= _ntoz(y),
'<=': lambda x, y: _ntoz(x) <= _ntoz(y),
'>': lambda x, y: _ntoz(x) > _ntoz(y),
'<': lambda x, y: _ntoz(x) < _ntoz(y)
}
def all_elements(lhs, op, rhs) -> bool:
'''Checks that two lists have the same elements'''
cmp = _cmp[op]
op1 = _to_list(lhs)
op2 = _to_list(rhs)
return all(cmp(el1, el2) for el1 in op1 for el2 in op2)
def disjoint(op1, op2):
'''Checks if two lists have no common elements'''
op1 = set(_to_list(op1))
op2 = set(_to_list(op2))
return not op1 & op2
def contains(op1, op2):
''' Checks if op2 is contained in op1
(e.g. every element of op2 is in op1)
'''
op1 = set(_to_list(op1))
op2 = set(_to_list(op2))
return op2.issubset(op1)
def join(lst, sep=''):
''' Joins the string representation of the list elements, optionally
separated.
'''
return sep.join([str(el) for el in lst])
def any_elements(lhs, op, rhs) -> bool:
'''Checks if to lists have any common element(s)'''
cmp = _cmp[op]
op1 = _to_list(lhs)
op2 = _to_list(rhs)
return any(cmp(el1, el2) for el1 in op1 for el2 in op2)
def check_cardinality(prop, inf: int, sup: int | None = None) -> bool:
''' If the supremum is not supplied (e.g. is None), the property is
unbounded (e.g. it corresponds to (x..*) in rosetta).
'''
if not prop:
prop_card = 0
elif isinstance(prop, (list, tuple)):
prop_card = len(prop)
else:
prop_card = 1
if sup is None:
sup = prop_card
return inf <= prop_card <= sup
def get_only_element(collection):
''' Returns the single element of a collection, if the list contains more
more than one element or is empty, None is returned.
'''
if isinstance(collection, (list, tuple)) and len(collection) == 1:
return collection[0]
return None
def flatten_list(nested_list):
'''flattens the list of lists (no-recursively)'''
return [item for sublist in nested_list for item in sublist]
def rosetta_filter(items, filter_func, item_name='item'):
"""
Filters a list of items based on a specified filtering criteria provided as
a boolean lambda function.
:param items: List of items to be filtered.
:param filter_func: A lambda function representing the boolean expression
for filtering.
:param item_name: The name used to refer to each item in the boolean
expression.
:return: Filtered list.
"""
return [item for item in items if filter_func(locals()[item_name])]
def set_rosetta_attr(obj: Any, path: str, value: Any) -> None:
"""
Sets an attribute of a Rosetta model object to a specified value using a
path.
Parameters:
obj (Any): The object whose attribute is to be set.
path (str): The path to the attribute, with components separated by '->'.
value (Any): The value to set the attribute to.
Raises:
ValueError: If the object or attribute at any level in the path is None.
AttributeError: If an invalid attribute path is provided.
"""
if obj is None:
raise ValueError(
"Cannot set attribute on a None object in set_rosetta_attr.")
path_components = path.split('->') # Use '->' for splitting the path
parent_obj = obj
# Iterate through the path components, except the last one
for attrib in path_components[:-1]:
parent_obj = rosetta_resolve_attr(parent_obj, attrib)
if parent_obj is None:
raise ValueError(
f"Attribute '{attrib}' in the path is None, cannot "
"proceed to set value."
)
# Set the value to the last attribute in the path
final_attr = path_components[-1]
if hasattr(parent_obj, final_attr):
setattr(parent_obj, final_attr, value)
else:
raise AttributeError(
f"Invalid attribute '{final_attr}' for object of "
f"type {type(parent_obj).__name__}"
)
def add_rosetta_attr(obj: Any, attrib: str, value: Any) -> None:
"""
Adds a value to a list-like attribute of a Rosetta model object.
Parameters:
obj (Any): The object whose attribute is to be modified.
attrib (str): The list-like attribute to add the value to.
value (Any): The value to add to the attribute.
"""
if obj is not None:
if hasattr(obj, attrib):
current_attr = getattr(obj, attrib)
if isinstance(current_attr, list):
current_attr.append(value)
else:
raise TypeError(f"Attribute {attrib} is not list-like.")
else:
setattr(obj, attrib, [value])
else:
raise ValueError("Object for add_rosetta_attr cannot be None.")
# EOF
© 2015 - 2024 Weber Informatics LLC | Privacy Policy