fix(onto validation): correctly identify circular dependencies (DEV-769…

…) (#192)

Pipfile

@@ -16,6 +16,7 @@ rfc3987 = "*"
 pystrict = "*"
 openpyxl = "*"
 pyparsing = "==2.4.7"
+networkx = "*"
 
 [dev-packages]
 mkdocs = "*"

dev-requirements.txt

@@ -13,55 +13,55 @@ cerberus==1.3.4
 certifi==2021.10.8
 chardet==4.0.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
 charset-normalizer==2.0.12; python_version >= '3'
-click==8.1.2
+click==8.1.3
 colorama==0.4.4; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
 distlib==0.3.4
-ghp-import==2.0.2
+ghp-import==2.1.0
 idna==3.3; python_version >= '3'
 importlib-metadata==4.11.3; python_version >= '3.7'
 iniconfig==1.1.1
-jinja2==3.1.1; python_version >= '3.7'
-markdown==3.3.6; python_version >= '3.6'
+jinja2==3.1.2; python_version >= '3.7'
+markdown==3.3.7; python_version >= '3.6'
 markupsafe==2.1.1; python_version >= '3.7'
 mergedeep==1.3.4; python_version >= '3.6'
-mkdocs-include-markdown-plugin==3.3.0
+mkdocs-include-markdown-plugin==3.4.0
 mkdocs-material-extensions==1.0.3; python_version >= '3.6'
-mkdocs-material==8.2.11
+mkdocs-material==8.2.15
 mkdocs==1.3.0
 mypy-extensions==0.4.3
-mypy==0.942
-numpy==1.22.3; platform_machine != 'aarch64' and platform_machine != 'arm64' and python_version < '3.10'
+mypy==0.950
+numpy==1.22.3; python_version < '3.10' and platform_machine != 'aarch64' and platform_machine != 'arm64'
 orderedmultidict==1.0.1
 packaging==20.9; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 pandas==1.4.2
 pep517==0.12.0
 pip-shims==0.7.0; python_version >= '3.6'
-pip==22.0.4; python_version >= '3.7'
+pip==22.1; python_version >= '3.7'
 pipenv-setup==3.2.0
 pipfile==0.0.2
 platformdirs==2.5.2; python_version >= '3.7'
 plette[validation]==0.2.3; python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'
 pluggy==1.0.0; python_version >= '3.6'
 py==1.11.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
 pycodestyle==2.8.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
-pygments==2.11.2; python_version >= '3.5'
-pymdown-extensions==9.3; python_version >= '3.7'
+pygments==2.12.0; python_version >= '3.6'
+pymdown-extensions==9.4; python_version >= '3.7'
 pyparsing==2.4.7
 pytest==7.1.2
-python-dateutil==2.8.2; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2'
+python-dateutil==2.8.2; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 pytz==2022.1
 pyyaml-env-tag==0.1; python_version >= '3.6'
 pyyaml==6.0; python_version >= '3.6'
 requests==2.27.1
 requirementslib==1.6.4; python_version >= '3.7'
-setuptools==62.1.0; python_version >= '3.7'
-six==1.16.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2'
-toml==0.10.2; python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2'
+setuptools==62.2.0; python_version >= '3.7'
+six==1.16.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
+toml==0.10.2; python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'
 tomli==2.0.1; python_version >= '3.7'
-tomlkit==0.10.2; python_version >= '3.6' and python_version < '4'
+tomlkit==0.10.2; python_version >= '3.6' and python_version < '4.0'
 typing-extensions==4.2.0; python_version >= '3.7'
 urllib3==1.26.9; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'
 vistir==0.5.2; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
-watchdog==2.1.7; python_version >= '3.6'
+watchdog==2.1.8; python_version >= '3.6'
 wheel==0.37.1
 zipp==3.8.0; python_version >= '3.7'

knora/dsplib/utils/onto_validate.py

@@ -1,9 +1,10 @@
-import json
 import os
 import re
-from typing import Any, Union, List, Set
+from typing import Any, Union
 import jsonschema
+import json
 import jsonpath_ng, jsonpath_ng.ext
+import networkx as nx
 from ..utils.expand_all_lists import expand_lists_from_excel
 
 
@@ -56,33 +57,65 @@ def validate_ontology(input_file_or_json: Union[str, dict[Any, Any], 'os.PathLik
 
 def check_cardinalities_of_circular_references(data_model: dict[Any, Any]) -> bool:
     """
-    Check if there are properties derived from hasLinkTo that form a circular reference. If so, these
+    Check a data model if it contains properties derived from hasLinkTo that form a circular reference. If so, these
     properties must have the cardinality 0-1 or 0-n, because during the xmlupload process, these values
     are temporarily removed.
+
+    Args:
+        data_model: dictionary with a DSP project (as defined in a JSON ontology file)
+
+    Returns:
+        True if no circle was detected, or if all elements of all circles are of cardinality "0-1" or "0-n".
+        False if there is a circle with at least one element that has a cardinality of "1" or "1-n".
     """
 
-    # search the ontology for all properties that are derived from hasLinkTo, store them in a dict, and map
-    # them to their objects (i.e. the resource classes they point to)
-    # example: if the property 'rosetta:hasTextMedium' points to 'rosetta:Image2D':
-    # link_properties = {'rosetta:hasTextMedium': ['rosetta:Image2D'], ...}
+    link_properties = collect_link_properties(data_model)
+    errors = identify_problematic_cardinalities(data_model, link_properties)
+
+    if len(errors) == 0:
+        return True
+    else:
+        print('ERROR: Your ontology contains properties derived from "hasLinkTo" that allow circular references '
+              'between resources. This is not a problem in itself, but if you try to upload data that actually '
+              'contains circular references, these "hasLinkTo" properties will be temporarily removed from the '
+              'affected resources. Therefore, it is necessary that all involved "hasLinkTo" properties have a '
+              'cardinality of 0-1 or 0-n. \n'
+              'Please make sure that the following properties have a cardinality of 0-1 or 0-n:')
+        for error in errors:
+            print(f'\t- Resource {error[0]}, property {error[1]}')
+        return False
+
+
+def collect_link_properties(data_model: dict[Any, Any]) -> dict[str, list[str]]:
+    """
+    map the properties derived from hasLinkTo to the resource classes they point to, for example:
+    link_properties = {'rosetta:hasImage2D': ['rosetta:Image2D'], ...}
+    """
     ontos = data_model['project']['ontologies']
-    link_properties: dict[str, List[str]] = dict()
+    hasLinkTo_props = {'hasLinkTo', 'isPartOf', 'isRegionOf', 'isAnnotationOf'}
+    link_properties: dict[str, list[str]] = dict()
     for index, onto in enumerate(ontos):
-        hasLinkTo_matches = jsonpath_ng.ext.parse(
-            f'$.project.ontologies[{index}].properties[?@.super[*] == hasLinkTo]'
-        ).find(data_model)
-        prop_obj_pair: dict[str, List[str]] = dict()
+        hasLinkTo_matches = list()
+        # look for child-properties down to 5 inheritance levels that are derived from hasLinkTo-properties
+        for i in range(5):
+            for hasLinkTo_prop in hasLinkTo_props:
+                hasLinkTo_matches.extend(jsonpath_ng.ext.parse(
+                    f'$.project.ontologies[{index}].properties[?super[*] == {hasLinkTo_prop}]'
+                ).find(data_model))
+            # make the children from this iteration to the parents of the next iteration
+            hasLinkTo_props = {x.value['name'] for x in hasLinkTo_matches}
+        prop_obj_pair: dict[str, list[str]] = dict()
         for match in hasLinkTo_matches:
             prop = onto['name'] + ':' + match.value['name']
             target = match.value['object']
             if target != 'Resource':
                 # make the target a fully qualified name (with the ontology's name prefixed)
-                target = re.sub(r'^(:?)([^:]+)$', f'{onto["name"]}:\\2', target)
+                target = re.sub(r'^:([^:]+)$', f'{onto["name"]}:\\1', target)
             prop_obj_pair[prop] = [target]
         link_properties.update(prop_obj_pair)
 
     # in case the object of a property is "Resource", the link can point to any resource class
-    all_res_names: List[str] = list()
+    all_res_names: list[str] = list()
     for index, onto in enumerate(ontos):
         matches = jsonpath_ng.ext.parse(f'$.resources[*].name').find(onto)
         tmp = [f'{onto["name"]}:{match.value}' for match in matches]
@@ -91,11 +124,19 @@ def check_cardinalities_of_circular_references(data_model: dict[Any, Any]) -> bo
         if 'Resource' in targ:
             link_properties[prop] = all_res_names
 
-    # make a dict that maps resource classes to their hasLinkTo-properties, and to the classes they point to
-    # example: if 'rosetta:Text' has the property 'rosetta:hasTextMedium' that points to 'rosetta:Image2D':
-    # dependencies = {'rosetta:Text': {'rosetta:hasTextMedium': ['rosetta:Image2D'], ...}}
-    dependencies: dict[str, dict[str, List[str]]] = dict()
-    for onto in ontos:
+    return link_properties
+
+
+def identify_problematic_cardinalities(data_model: dict[Any, Any], link_properties: dict[str, list[str]]) -> list[tuple[str, str]]:
+    """
+    make an error list with all cardinalities that are part of a circle but have a cardinality of "1" or "1-n"
+    """
+    # make 2 dicts of the following form:
+    # dependencies = {'rosetta:Text': {'rosetta:hasImage2D': ['rosetta:Image2D'], ...}}
+    # cardinalities = {'rosetta:Text': {'rosetta:hasImage2D': '0-1', ...}}
+    dependencies: dict[str, dict[str, list[str]]] = dict()
+    cardinalities: dict[str, dict[str, str]] = dict()
+    for onto in data_model['project']['ontologies']:
         for resource in onto['resources']:
             resname: str = onto['name'] + ':' + resource['name']
             for card in resource['cardinalities']:
@@ -111,64 +152,31 @@ def check_cardinalities_of_circular_references(data_model: dict[Any, Any]) -> bo
                     if resname not in dependencies:
                         dependencies[resname] = dict()
                         dependencies[resname][cardname] = targets
+                        cardinalities[resname] = dict()
+                        cardinalities[resname][cardname] = card['cardinality']
                     elif cardname not in dependencies[resname]:
                         dependencies[resname][cardname] = targets
+                        cardinalities[resname][cardname] = card['cardinality']
                     else:
                         dependencies[resname][cardname].extend(targets)
 
-    # iteratively purge dependencies from non-circular references
-    for _ in range(30):
-        # remove targets that point to a resource that is not in dependencies,
-        # remove cardinalities that have no targets
-        for res, cards in dependencies.copy().items():
-            for card, targets in cards.copy().items():
-                dependencies[res][card] = [target for target in targets if target in dependencies]
-                if len(dependencies[res][card]) == 0:
-                    del dependencies[res][card]
-        # remove resources that have no cardinalities
-        dependencies = {res: cards for res, cards in dependencies.items() if len(cards) > 0}
-        # remove resources that are not pointed to by any target
-        all_targets: Set[str] = set()
-        for cards in dependencies.values():
-            for trgt in cards.values():
-                all_targets = all_targets | set(trgt)
-        dependencies = {res: targets for res, targets in dependencies.items() if res in all_targets}
-
-    # check the remaining dependencies (which are only the circular ones) if they have all 0-1 or 0-n
-    ok_cardinalities = ['0-1', '0-n']
-    notok_dependencies: dict[str, List[str]] = dict()
-    for res, cards in dependencies.items():
-        ontoname, resname = res.split(':')
-        for card in cards:
-            # the name of the cardinality could be with prepended onto, only with colon, or without anything
-            card_without_colon = card.split(':')[1]
-            card_with_colon = ':' + card_without_colon
-            card_variations = [card, card_with_colon, card_without_colon]
-            for card_variation in card_variations:
-                match = jsonpath_ng.ext.parse(
-                    f'$[?@.name == {ontoname}].resources[?@.name == {resname}].cardinalities[?@.propname == "{card_variation}"]'
-                ).find(ontos)
-                if len(match) > 0:
-                    break
-            card_numbers = match[0].value['cardinality']
-            if card_numbers not in ok_cardinalities:
-                if res not in notok_dependencies:
-                    notok_dependencies[res] = [card]
-                else:
-                    notok_dependencies[res].append(card)
-
-    if len(notok_dependencies) == 0:
-        return True
-    else:
-        print('ERROR: Your ontology contains properties derived from "hasLinkTo" that allow circular references '
-              'between resources. This is not a problem in itself, but if you try to upload data that actually '
-              'contains circular references, these "hasLinkTo" cardinalities will be temporarily removed from the '
-              'affected resources. Therefore, it is necessary that the involved "hasLinkTo" cardinalities have a '
-              'cardinality of 0-1 or 0-n. \n'
-              'Please make sure that the following cardinalities have a cardinality of 0-1 or 0-n:')
-        for _res, _cards in notok_dependencies.items():
-            print(_res)
-            for card in _cards:
-                print(f'\t{card}')
-        return False
-
+    # transform the dependencies into a graph structure
+    graph = nx.MultiDiGraph()
+    for start, cards in dependencies.items():
+        for edge, targets in cards.items():
+            for target in targets:
+                graph.add_edge(start, target, edge)
+
+    # find elements of circles that have a cardinality of "1" or "1-n"
+    errors: set[tuple[str, str]] = set()
+    circles = list(nx.simple_cycles(graph))
+    for circle in circles:
+        for index, resource in enumerate(circle):
+            target = circle[(index+1) % len(circle)]
+            for property, targets in dependencies[resource].items():
+                if target in targets:
+                    prop = property
+            if cardinalities[resource][prop] not in ['0-1', '0-n']:
+                errors.add((resource, prop))
+
+    return sorted(errors, key=lambda x: x[0])

requirements.txt

@@ -10,14 +10,15 @@ argparse==1.4.0
 attrs==21.4.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
 certifi==2021.10.8
 charset-normalizer==2.0.12; python_version >= '3'
-click==8.1.2
+click==8.1.3
 decorator==5.1.1; python_version >= '3.5'
 et-xmlfile==1.1.0; python_version >= '3.6'
 idna==3.3; python_version >= '3'
 isodate==0.6.1
 jsonpath-ng==1.5.3
-jsonschema==4.4.0
+jsonschema==4.5.1
 lxml==4.8.0
+networkx==2.8
 openpyxl==3.0.9
 ply==3.11
 pyparsing==2.4.7
@@ -26,7 +27,7 @@ pystrict==1.2
 rdflib==6.1.1
 requests==2.27.1
 rfc3987==1.3.8
-setuptools==62.1.0; python_version >= '3.7'
-six==1.16.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2'
+setuptools==62.2.0; python_version >= '3.7'
+six==1.16.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 urllib3==1.26.9; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'
-validators==0.18.2
+validators==0.19.0

setup.py

@@ -20,7 +20,7 @@
         "Operating System :: OS Independent",
     ],
     python_requires='>=3.9.0',
-    install_requires=['argparse==1.4.0', "attrs==21.4.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'", 'certifi==2021.10.8', "charset-normalizer==2.0.12; python_version >= '3'", 'click==8.1.2', "decorator==5.1.1; python_version >= '3.5'", "et-xmlfile==1.1.0; python_version >= '3.6'", "idna==3.3; python_version >= '3'", 'isodate==0.6.1', 'jsonpath-ng==1.5.3', 'jsonschema==4.4.0', 'lxml==4.8.0', 'openpyxl==3.0.9', 'ply==3.11', 'pyparsing==2.4.7', "pyrsistent==0.18.1; python_version >= '3.7'", 'pystrict==1.2', 'rdflib==6.1.1', 'requests==2.27.1', 'rfc3987==1.3.8', "setuptools==62.1.0; python_version >= '3.7'", "six==1.16.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2'", "urllib3==1.26.9; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'", 'validators==0.18.2'
+    install_requires=['argparse==1.4.0', "attrs==21.4.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'", 'certifi==2021.10.8', "charset-normalizer==2.0.12; python_version >= '3'", 'click==8.1.3', "decorator==5.1.1; python_version >= '3.5'", "et-xmlfile==1.1.0; python_version >= '3.6'", "idna==3.3; python_version >= '3'", 'isodate==0.6.1', 'jsonpath-ng==1.5.3', 'jsonschema==4.5.1', 'lxml==4.8.0', 'networkx==2.8', 'openpyxl==3.0.9', 'ply==3.11', 'pyparsing==2.4.7', "pyrsistent==0.18.1; python_version >= '3.7'", 'pystrict==1.2', 'rdflib==6.1.1', 'requests==2.27.1', 'rfc3987==1.3.8', "setuptools==62.2.0; python_version >= '3.7'", "six==1.16.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'", "urllib3==1.26.9; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'", 'validators==0.19.0'
                       ],
     entry_points={
         'console_scripts': [

test/unittests/test_create_ontology.py

@@ -2,14 +2,18 @@
 import unittest
 import json
 from typing import Any
+import jsonpath_ng.ext
 
-from knora.dsplib.utils.onto_create_ontology import *
+from knora.dsplib.utils.onto_create_ontology import sort_resources, sort_prop_classes
+from knora.dsplib.utils.onto_validate import collect_link_properties, identify_problematic_cardinalities
 
 
 class TestOntoCreation(unittest.TestCase):
     with open('testdata/test-onto.json', 'r') as json_file:
-        json_onto: dict[str, Any] = json.load(json_file)
-    ontology: dict[str, Any] = json_onto['project']['ontologies'][0]
+        project: dict[str, Any] = json.load(json_file)
+        ontology: dict[str, Any] = project['project']['ontologies'][0]
+    with open('testdata/circular-onto.json', 'r') as json_file:
+        circular_onto: dict[str, Any] = json.load(json_file)
 
     def test_sort_resources(self) -> None:
         """
@@ -43,5 +47,15 @@ def test_sort_prop_classes(self) -> None:
         self.assertListEqual(unsorted_props, sorted_props)
 
 
+    def test_circular_references_in_onto(self) -> None:
+        link_properties = collect_link_properties(self.circular_onto)
+        errors = identify_problematic_cardinalities(self.circular_onto, link_properties)
+        expected_errors = [
+            ('testonto:AnyResource', 'testonto:linkToTestThing1'),
+            ('testonto:TestThing3', 'testonto:linkToResource')
+        ]
+        self.assertListEqual(sorted(errors), sorted(expected_errors))
+
+
 if __name__ == '__main__':
     unittest.main()