590 lines
30 KiB
Python
590 lines
30 KiB
Python
from services.bottom.V0 import Bottom
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from uuid import UUID
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from state.base import State
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from typing import Dict, Tuple, Set, Any, List
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from pprint import pprint
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import functools
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class Conformance:
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def __init__(self, state: State, model: UUID, type_model: UUID):
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self.state = state
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self.bottom = Bottom(state)
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type_model_id = state.read_dict(state.read_root(), "SCD")
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self.scd_model = UUID(state.read_value(type_model_id))
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self.model = model
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self.type_model = type_model
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self.type_mapping: Dict[str, str] = {}
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self.model_names = {
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# map model elements to their names to prevent iterating too much
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self.bottom.read_outgoing_elements(self.model, e)[0]: e
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for e in self.bottom.read_keys(self.model)
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}
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self.type_model_names = {
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# map type model elements to their names to prevent iterating too much
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self.bottom.read_outgoing_elements(self.type_model, e)[0]
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: e for e in self.bottom.read_keys(self.type_model)
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}
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self.sub_types: Dict[str, Set[str]] = {
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k: set() for k in self.bottom.read_keys(self.type_model)
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}
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self.primitive_values: Dict[UUID, Any] = {}
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self.abstract_types: List[str] = []
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self.multiplicities: Dict[str, Tuple] = {}
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self.source_multiplicities: Dict[str, Tuple] = {}
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self.target_multiplicities: Dict[str, Tuple] = {}
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self.structures = {}
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self.matches = {}
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self.candidates = {}
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def check_nominal(self, *, log=False):
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"""
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Perform a nominal conformance check
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Args:
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log: boolean indicating whether to log errors
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Returns:
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Boolean indicating whether the check has passed
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"""
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try:
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self.check_typing()
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self.check_link_typing()
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self.check_multiplicities()
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self.check_constraints()
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return True
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except RuntimeError as e:
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if log:
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print(e)
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return False
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def check_structural(self, *, build_morphisms=True, log=False):
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"""
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Perform a structural conformance check
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Args:
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build_morphisms: boolean indicating whether to create morpishm links
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log: boolean indicating whether to log errors
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Returns:
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Boolean indicating whether the check has passed
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"""
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try:
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self.precompute_structures()
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self.match_structures()
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if build_morphisms:
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self.build_morphisms()
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self.check_nominal(log=log)
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return True
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except RuntimeError as e:
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if log:
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print(e)
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return False
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def read_attribute(self, element: UUID, attr_name: str):
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"""
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Read an attribute value attached to an element
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Args:
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element: UUID of the element
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attr_name: name of the attribute to read
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Returns:
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The value of hte attribute, if no attribute with given name is found, returns None
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"""
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if element in self.type_model_names:
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# type model element
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element_name = self.type_model_names[element]
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model = self.type_model
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else:
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# model element
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element_name = self.model_names[element]
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model = self.model
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try:
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attr_elem, = self.bottom.read_outgoing_elements(model, f"{element_name}.{attr_name}")
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return self.primitive_values.get(attr_elem, self.bottom.read_value(attr_elem))
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except ValueError:
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return None
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def precompute_sub_types(self):
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"""
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Creates an internal representation of sub-type hierarchies that is
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more easily queryable that the state graph
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"""
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# collect inheritance link instances
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inh_element, = self.bottom.read_outgoing_elements(self.scd_model, "Inheritance")
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inh_links = []
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for tm_element, tm_name in self.type_model_names.items():
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morphisms = self.bottom.read_outgoing_elements(tm_element, "Morphism")
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if inh_element in morphisms:
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# we have an instance of an inheritance link
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inh_links.append(tm_element)
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# for each inheritance link we add the parent and child to the sub types map
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for link in inh_links:
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tm_source = self.bottom.read_edge_source(link)
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tm_target = self.bottom.read_edge_target(link)
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parent_name = self.type_model_names[tm_target]
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child_name = self.type_model_names[tm_source]
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self.sub_types[parent_name].add(child_name)
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# iteratively expand the sub type hierarchies in the sub types map
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stop = False
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while not stop:
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stop = True
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for child_name, child_children in self.sub_types.items():
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for parent_name, parent_children in self.sub_types.items():
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if child_name in parent_children:
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original_size = len(parent_children)
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parent_children.update(child_children)
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if len(parent_children) != original_size:
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stop = False
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def deref_primitive_values(self):
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"""
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Prefetch the values stored in referenced primitive type models
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"""
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ref_element, = self.bottom.read_outgoing_elements(self.scd_model, "ModelRef")
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string_element, = self.bottom.read_outgoing_elements(self.scd_model, "String")
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boolean_element, = self.bottom.read_outgoing_elements(self.scd_model, "Boolean")
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integer_element, = self.bottom.read_outgoing_elements(self.scd_model, "Integer")
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t_deref = []
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t_refs = []
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for tm_element, tm_name in self.type_model_names.items():
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morphisms = self.bottom.read_outgoing_elements(tm_element, "Morphism")
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if ref_element in morphisms:
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t_refs.append(self.type_model_names[tm_element])
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elif string_element in morphisms:
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t_deref.append(tm_element)
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elif boolean_element in morphisms:
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t_deref.append(tm_element)
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elif integer_element in morphisms:
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t_deref.append(tm_element)
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for elem in t_deref:
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primitive_model = UUID(self.bottom.read_value(elem))
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primitive_value_node, = self.bottom.read_outgoing_elements(primitive_model)
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primitive_value = self.bottom.read_value(primitive_value_node)
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self.primitive_values[elem] = primitive_value
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for m_name, tm_name in self.type_mapping.items():
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if tm_name in t_refs:
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# dereference
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m_element, = self.bottom.read_outgoing_elements(self.model, m_name)
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primitive_model = UUID(self.bottom.read_value(m_element))
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try:
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primitive_value_node, = self.bottom.read_outgoing_elements(primitive_model)
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primitive_value = self.bottom.read_value(primitive_value_node)
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self.primitive_values[m_element] = primitive_value
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except ValueError:
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pass # multiple elements in model indicate that we're not dealing with a primitive
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def precompute_multiplicities(self):
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"""
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Creates an internal representation of type multiplicities that is
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more easily queryable that the state graph
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"""
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for tm_element, tm_name in self.type_model_names.items():
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# class abstract flags and multiplicities
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abstract = self.read_attribute(tm_element, "abstract")
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lc = self.read_attribute(tm_element, "lower_cardinality")
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uc = self.read_attribute(tm_element, "upper_cardinality")
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if abstract:
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self.abstract_types.append(tm_name)
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if lc or uc:
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mult = (
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lc if lc != None else float("-inf"),
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uc if uc != None else float("inf")
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)
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self.multiplicities[tm_name] = mult
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# multiplicities for associations
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slc = self.read_attribute(tm_element, "source_lower_cardinality")
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suc = self.read_attribute(tm_element, "source_upper_cardinality")
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if slc or suc:
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mult = (
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slc if slc != None else float("-inf"),
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suc if suc != None else float("inf")
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)
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self.source_multiplicities[tm_name] = mult
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tlc = self.read_attribute(tm_element, "target_lower_cardinality")
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tuc = self.read_attribute(tm_element, "target_upper_cardinality")
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if tlc or tuc:
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mult = (
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tlc if tlc != None else float("-inf"),
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tuc if tuc != None else float("inf")
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)
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self.target_multiplicities[tm_name] = mult
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# optional for attribute links
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opt = self.read_attribute(tm_element, "optional")
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if opt != None:
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self.source_multiplicities[tm_name] = (0 if opt else 1, 1)
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self.target_multiplicities[tm_name] = (0, 1)
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def get_type(self, element: UUID):
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"""
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Retrieve the type of an element (wrt. current type model)
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"""
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morphisms = self.bottom.read_outgoing_elements(element, "Morphism")
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tm_element, = [m for m in morphisms if m in self.type_model_names.keys()]
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return tm_element
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def check_typing(self):
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"""
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for each element of model check whether a morphism
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link exists to some element of type_model
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"""
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ref_element, = self.bottom.read_outgoing_elements(self.scd_model, "ModelRef")
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model_names = self.bottom.read_keys(self.model)
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for m_name in model_names:
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m_element, = self.bottom.read_outgoing_elements(self.model, m_name)
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try:
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tm_element = self.get_type(m_element)
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tm_name = self.type_model_names[tm_element]
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self.type_mapping[m_name] = tm_name
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if ref_element in self.bottom.read_outgoing_elements(tm_element, "Morphism"):
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sub_m = UUID(self.bottom.read_value(m_element))
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sub_tm = UUID(self.bottom.read_value(tm_element))
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if not Conformance(self.state, sub_m, sub_tm).check_nominal():
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raise RuntimeError(f"Incorrectly model reference: {m_name}")
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except ValueError as e:
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import traceback
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traceback.format_exc(e)
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# no or too many morphism links found
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raise RuntimeError(f"Incorrectly typed element: {m_name}")
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return True
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def check_link_typing(self):
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"""
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for each link, check whether its source and target are of a valid type
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"""
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self.precompute_sub_types()
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for m_name, tm_name in self.type_mapping.items():
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m_element, = self.bottom.read_outgoing_elements(self.model, m_name)
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m_source = self.bottom.read_edge_source(m_element)
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m_target = self.bottom.read_edge_target(m_element)
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if m_source == None or m_target == None:
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# element is not a link
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continue
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tm_element, = self.bottom.read_outgoing_elements(self.type_model, tm_name)
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tm_source = self.bottom.read_edge_source(tm_element)
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tm_target = self.bottom.read_edge_target(tm_element)
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# check if source is typed correctly
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source_name = self.model_names[m_source]
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source_type_actual = self.type_mapping[source_name]
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source_type_expected = self.type_model_names[tm_source]
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if source_type_actual != source_type_expected:
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if source_type_actual not in self.sub_types[source_type_expected]:
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raise RuntimeError(f"Invalid source type {source_type_actual} for element {m_name}")
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# check if target is typed correctly
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target_name = self.model_names[m_target]
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target_type_actual = self.type_mapping[target_name]
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target_type_expected = self.type_model_names[tm_target]
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if target_type_actual != target_type_expected:
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if target_type_actual not in self.sub_types[target_type_expected]:
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raise RuntimeError(f"Invalid target type {target_type_actual} for element {m_name}")
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return True
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def check_multiplicities(self):
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"""
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Check whether multiplicities for all types are respected
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"""
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self.deref_primitive_values()
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self.precompute_multiplicities()
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for tm_name in self.type_model_names.values():
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# abstract classes
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if tm_name in self.abstract_types:
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type_count = list(self.type_mapping.values()).count(tm_name)
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if type_count > 0:
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raise RuntimeError(f"Invalid instantiation of abstract class: {tm_name}")
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# class multiplicities
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if tm_name in self.multiplicities:
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lc, uc = self.multiplicities[tm_name]
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type_count = list(self.type_mapping.values()).count(tm_name)
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for sub_type in self.sub_types[tm_name]:
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type_count += list(self.type_mapping.values()).count(sub_type)
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if type_count < lc or type_count > uc:
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raise RuntimeError(f"Cardinality of type exceeds valid multiplicity range: {tm_name} ({type_count})")
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# association source multiplicities
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if tm_name in self.source_multiplicities:
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tm_element, = self.bottom.read_outgoing_elements(self.type_model, tm_name)
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tm_source_element = self.bottom.read_edge_source(tm_element)
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tm_source_name = self.type_model_names[tm_source_element]
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lc, uc = self.source_multiplicities[tm_name]
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for i, t in self.type_mapping.items():
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if t == tm_source_name or t in self.sub_types[tm_source_name]:
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count = 0
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i_element, = self.bottom.read_outgoing_elements(self.model, i)
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outgoing = self.bottom.read_outgoing_edges(i_element)
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for o in outgoing:
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try:
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if self.type_mapping[self.model_names[o]] == tm_name:
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count += 1
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except KeyError:
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pass # for elements not part of model, e.g. morphism links
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if count < lc or count > uc:
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raise RuntimeError(f"Source cardinality of type {tm_name} exceeds valid multiplicity range in {i}.")
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# association target multiplicities
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if tm_name in self.target_multiplicities:
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tm_element, = self.bottom.read_outgoing_elements(self.type_model, tm_name)
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tm_target_element = self.bottom.read_edge_target(tm_element)
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tm_target_name = self.type_model_names[tm_target_element]
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lc, uc = self.target_multiplicities[tm_name]
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for i, t in self.type_mapping.items():
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if t == tm_target_name or t in self.sub_types[tm_target_name]:
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count = 0
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i_element, = self.bottom.read_outgoing_elements(self.model, i)
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outgoing = self.bottom.read_incoming_edges(i_element)
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for o in outgoing:
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try:
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if self.type_mapping[self.model_names[o]] == tm_name:
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count += 1
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except KeyError:
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pass # for elements not part of model, e.g. morphism links
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if count < lc or count > uc:
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print(f"Target cardinality of type {tm_name} exceeds valid multiplicity range in {i}.")
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return False
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return True
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def evaluate_constraint(self, code, **kwargs):
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"""
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Evaluate constraint code (Python code)
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"""
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funcs = {
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'read_value': self.state.read_value
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}
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return eval(
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code,
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{'__builtins__': {'isinstance': isinstance, 'print': print,
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'int': int, 'float': float, 'bool': bool, 'str': str, 'tuple': tuple}
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}, # globals
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{**kwargs, **funcs} # locals
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)
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def check_constraints(self):
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"""
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Check whether all constraints defined for a model are respected
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"""
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# local constraints
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for m_name, tm_name in self.type_mapping.items():
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if tm_name != "GlobalConstraint":
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tm_element, = self.bottom.read_outgoing_elements(self.type_model, tm_name)
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code = self.read_attribute(tm_element, "constraint")
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if code != None:
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morphisms = self.bottom.read_incoming_elements(tm_element, "Morphism")
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morphisms = [m for m in morphisms if m in self.model_names]
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for m_element in morphisms:
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if not self.evaluate_constraint(code, element=m_element):
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raise RuntimeError(f"Local constraint of {tm_name} not satisfied in {m_name}.")
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# global constraints
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for m_name, tm_name in self.type_mapping.items():
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if tm_name == "GlobalConstraint":
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tm_element, = self.bottom.read_outgoing_elements(self.type_model, tm_name)
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code = self.read_attribute(tm_element, "constraint")
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if code != None:
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if not self.evaluate_constraint(code, model=self.model):
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raise RuntimeError(f"Global constraint {tm_name} not satisfied.")
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return True
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def precompute_structures(self):
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"""
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Make an internal representation of type structures such that comparing type structures is easier
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"""
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self.precompute_sub_types()
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scd_elements = self.bottom.read_outgoing_elements(self.scd_model)
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# collect types
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class_element, = self.bottom.read_outgoing_elements(self.scd_model, "Class")
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association_element, = self.bottom.read_outgoing_elements(self.scd_model, "Association")
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for tm_element, tm_name in self.type_model_names.items():
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# retrieve elements that tm_element is a morphism of
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morphisms = self.bottom.read_outgoing_elements(tm_element, "Morphism")
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morphism, = [m for m in morphisms if m in scd_elements]
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# check if tm_element is a morphism of AttributeLink
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if class_element == morphism or association_element == morphism:
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self.structures[tm_name] = set()
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# collect type structures
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# retrieve AttributeLink to check whether element is a morphism of AttributeLink
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attr_link_element, = self.bottom.read_outgoing_elements(self.scd_model, "AttributeLink")
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for tm_element, tm_name in self.type_model_names.items():
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# retrieve elements that tm_element is a morphism of
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morphisms = self.bottom.read_outgoing_elements(tm_element, "Morphism")
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morphism, = [m for m in morphisms if m in scd_elements]
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# check if tm_element is a morphism of AttributeLink
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if attr_link_element == morphism:
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# retrieve attributes of attribute link, i.e. 'name' and 'optional'
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attrs = self.bottom.read_outgoing_elements(tm_element)
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name_model_node, = filter(lambda x: self.type_model_names.get(x, "").endswith(".name"), attrs)
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opt_model_node, = filter(lambda x: self.type_model_names.get(x, "").endswith(".optional"), attrs)
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# get attr name value
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name_model = UUID(self.bottom.read_value(name_model_node))
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name_node, = self.bottom.read_outgoing_elements(name_model)
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name = self.bottom.read_value(name_node)
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# get attr opt value
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opt_model = UUID(self.bottom.read_value(opt_model_node))
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opt_node, = self.bottom.read_outgoing_elements(opt_model)
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opt = self.bottom.read_value(opt_node)
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# get attr type name
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source_type_node = self.bottom.read_edge_source(tm_element)
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source_type_name = self.type_model_names[source_type_node]
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target_type_node = self.bottom.read_edge_target(tm_element)
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target_type_name = self.type_model_names[target_type_node]
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# add attribute to the structure of its source type
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# attribute is stored as a (name, optional, type) triple
|
|
self.structures.setdefault(source_type_name, set()).add((name, opt, target_type_name))
|
|
# extend structures of sub types with attrs of super types
|
|
for super_type, sub_types in self.sub_types.items():
|
|
for sub_type in sub_types:
|
|
self.structures.setdefault(sub_type, set()).update(self.structures[super_type])
|
|
# filter out abstract types, as they cannot be instantiated
|
|
# retrieve Class_abstract to check whether element is a morphism of Class_abstract
|
|
class_abs_element, = self.bottom.read_outgoing_elements(self.scd_model, "Class_abstract")
|
|
for tm_element, tm_name in self.type_model_names.items():
|
|
# retrieve elements that tm_element is a morphism of
|
|
morphisms = self.bottom.read_outgoing_elements(tm_element, "Morphism")
|
|
morphism, = [m for m in morphisms if m in scd_elements]
|
|
# check if tm_element is a morphism of Class_abstract
|
|
if class_abs_element == morphism:
|
|
# retrieve 'abstract' attribute value
|
|
target_node = self.bottom.read_edge_target(tm_element)
|
|
abst_model = UUID(self.bottom.read_value(target_node))
|
|
abst_node, = self.bottom.read_outgoing_elements(abst_model)
|
|
is_abstract = self.bottom.read_value(abst_node)
|
|
# retrieve type name
|
|
source_node = self.bottom.read_edge_source(tm_element)
|
|
type_name = self.type_model_names[source_node]
|
|
if is_abstract:
|
|
self.structures.pop(type_name)
|
|
|
|
def match_structures(self):
|
|
"""
|
|
Try to match the structure of each element in the instance model to some element in the type model
|
|
"""
|
|
ref_element, = self.bottom.read_outgoing_elements(self.scd_model, "ModelRef")
|
|
# matching
|
|
for m_element, m_name in self.model_names.items():
|
|
is_edge = self.bottom.read_edge_source(m_element) != None
|
|
print('element:', m_element, 'name:', m_name, 'is_edge', is_edge)
|
|
for type_name, structure in self.structures.items():
|
|
tm_element, = self.bottom.read_outgoing_elements(self.type_model, type_name)
|
|
type_is_edge = self.bottom.read_edge_source(tm_element) != None
|
|
if is_edge == type_is_edge:
|
|
print(' type_name:', type_name, 'type_is_edge:', type_is_edge, "structure:", structure)
|
|
mismatch = False
|
|
matched = 0
|
|
for name, optional, attr_type in structure:
|
|
print(' name:', name, "optional:", optional, "attr_type:", attr_type)
|
|
try:
|
|
attr, = self.bottom.read_outgoing_elements(self.model, f"{m_name}.{name}")
|
|
attr_tm, = self.bottom.read_outgoing_elements(self.type_model, attr_type)
|
|
# if attribute is a modelref, we need to check whether it
|
|
# linguistically conforms to the specified type
|
|
# if its an internally defined attribute, this will be checked by constraints
|
|
morphisms = self.bottom.read_outgoing_elements(attr_tm, "Morphism")
|
|
attr_conforms = True
|
|
if ref_element in morphisms:
|
|
# check conformance of reference model
|
|
type_model_uuid = UUID(self.bottom.read_value(attr_tm))
|
|
model_uuid = UUID(self.bottom.read_value(attr))
|
|
attr_conforms = Conformance(self.state, model_uuid, type_model_uuid)\
|
|
.check_nominal()
|
|
else:
|
|
# eval constraints
|
|
code = self.read_attribute(attr_tm, "constraint")
|
|
if code != None:
|
|
attr_conforms = self.evaluate_constraint(code, element=attr)
|
|
if attr_conforms:
|
|
matched += 1
|
|
print(" attr_conforms -> matched:", matched)
|
|
except ValueError as e:
|
|
# attr not found or failed parsing UUID
|
|
if optional:
|
|
print(" skipping:", e)
|
|
continue
|
|
else:
|
|
# did not match mandatory attribute
|
|
print(" breaking:", e)
|
|
mismatch = True
|
|
break
|
|
|
|
print(' matched:', matched, 'len(structure):', len(structure))
|
|
# if matched == len(structure):
|
|
if not mismatch:
|
|
print(' add to candidates:', m_name, type_name)
|
|
self.candidates.setdefault(m_name, set()).add(type_name)
|
|
# filter out candidates for links based on source and target types
|
|
for m_element, m_name in self.model_names.items():
|
|
is_edge = self.bottom.read_edge_source(m_element) != None
|
|
if is_edge and m_name in self.candidates:
|
|
m_source = self.bottom.read_edge_source(m_element)
|
|
m_target = self.bottom.read_edge_target(m_element)
|
|
print(self.candidates)
|
|
source_candidates = self.candidates[self.model_names[m_source]]
|
|
target_candidates = self.candidates[self.model_names[m_target]]
|
|
remove = set()
|
|
for candidate_name in self.candidates[m_name]:
|
|
candidate_element, = self.bottom.read_outgoing_elements(self.type_model, candidate_name)
|
|
candidate_source = self.type_model_names[self.bottom.read_edge_source(candidate_element)]
|
|
if candidate_source not in source_candidates:
|
|
if len(source_candidates.intersection(set(self.sub_types[candidate_source]))) == 0:
|
|
remove.add(candidate_name)
|
|
candidate_target = self.type_model_names[self.bottom.read_edge_target(candidate_element)]
|
|
if candidate_target not in target_candidates:
|
|
if len(target_candidates.intersection(set(self.sub_types[candidate_target]))) == 0:
|
|
remove.add(candidate_name)
|
|
self.candidates[m_name] = self.candidates[m_name].difference(remove)
|
|
|
|
def build_morphisms(self):
|
|
"""
|
|
Build the morphisms between an instance and a type model that structurally match
|
|
"""
|
|
if not all([len(c) == 1 for c in self.candidates.values()]):
|
|
raise RuntimeError("Cannot build incomplete or ambiguous morphism.")
|
|
mapping = {k: v.pop() for k, v in self.candidates.items()}
|
|
for m_name, tm_name in mapping.items():
|
|
# morphism to class/assoc
|
|
m_element, = self.bottom.read_outgoing_elements(self.model, m_name)
|
|
tm_element, = self.bottom.read_outgoing_elements(self.type_model, tm_name)
|
|
self.bottom.create_edge(m_element, tm_element, "Morphism")
|
|
# morphism for attributes and attribute links
|
|
structure = self.structures[tm_name]
|
|
for attr_name, _, attr_type in structure:
|
|
try:
|
|
# attribute node
|
|
attr_element, = self.bottom.read_outgoing_elements(self.model, f"{m_name}.{attr_name}")
|
|
attr_type_element, = self.bottom.read_outgoing_elements(self.type_model, attr_type)
|
|
self.bottom.create_edge(attr_element, attr_type_element, "Morphism")
|
|
# attribute link
|
|
attr_link_element, = self.bottom.read_outgoing_elements(self.model, f"{m_name}_{attr_name}")
|
|
attr_link_type_element, = self.bottom.read_outgoing_elements(self.type_model, f"{tm_name}_{attr_name}")
|
|
self.bottom.create_edge(attr_link_element, attr_link_type_element, "Morphism")
|
|
except ValueError:
|
|
pass
|
|
|
|
|
|
if __name__ == '__main__':
|
|
from state.devstate import DevState as State
|
|
s = State()
|
|
from bootstrap.scd import bootstrap_scd
|
|
scd = bootstrap_scd(s)
|
|
from bootstrap.pn import bootstrap_pn
|
|
ltm_pn = bootstrap_pn(s, "PN")
|
|
ltm_pn_lola = bootstrap_pn(s, "PNlola")
|
|
from services.pn import PN
|
|
my_pn = s.create_node()
|
|
PNserv = PN(my_pn, s)
|
|
PNserv.create_place("p1", 5)
|
|
PNserv.create_place("p2", 0)
|
|
PNserv.create_transition("t1")
|
|
PNserv.create_p2t("p1", "t1", 1)
|
|
PNserv.create_t2p("t1", "p2", 1)
|
|
|
|
cf = Conformance(s, my_pn, ltm_pn_lola)
|
|
# cf = Conformance(s, scd, ltm_pn, scd)
|
|
cf.precompute_structures()
|
|
cf.match_structures()
|
|
cf.build_morphisms()
|
|
print(cf.check_nominal())
|
|
|
|
|