Add platform independent path/URI handling

URIs can be stored, e.g. for OWL import. However, Windows paths are not
recognized as URIs. Therefore a tool is needed to convert a Windows
path into an URI compatible path.

Signed-off-by: marcel <[email protected]>

semantic-model/opcua/lib/nodesetparser.py

@@ -314,7 +314,7 @@ def create_header(self):
             self.g.add((self.ontology_name, OWL.versionIRI, self.versionIRI))
         self.g.add((self.ontology_name, OWL.versionInfo, Literal(0.1)))
         for ontology in self.imported_ontologies:
-            self.g.add((self.ontology_name, OWL.imports, ontology))
+            self.g.add((self.ontology_name, OWL.imports, utils.file_path_to_uri(ontology)))
 
     def create_prefixes(self, xml_node, base, opcua_namespace):
         self.rdf_ns['base'] = Namespace(base)

semantic-model/opcua/lib/utils.py

@@ -17,6 +17,7 @@
 from urllib.parse import urlparse
 from rdflib.namespace import RDFS, XSD, OWL, RDF
 from rdflib import URIRef, Namespace, Graph
+from pathlib import Path
 import re
 import os
 
@@ -261,6 +262,13 @@ def get_common_supertype(graph, class1, class2):
     return superclass
 
 
+def file_path_to_uri(file_path):
+    if str(file_path).startswith('http'):
+        return URIRef(str(file_path))
+    path = Path(os.path.abspath(str(file_path)))
+    return URIRef(path.as_uri())
+
+
 class RdfUtils:
     def __init__(self, basens, opcuans):
         self.basens = basens