Fix invalid AP target class

src/coscine/metadata.py

@@ -725,11 +725,26 @@ class ApplicationProfile(ApplicationProfileInfo):
         self.graph.bind("sh", "http://www.w3.org/ns/shacl#")
         self.graph.bind("dcterms", "http://purl.org/dc/terms/")
         self.graph.parse(data=self.definition, format="ttl")
-        self._resolve_imports() # FIXME/TODO Is this ok?
+        self._determine_target_class()
+        self._resolve_imports()
 
     def __str__(self) -> str:
         return str(self.graph.serialize(format="ttl"))
 
+    def _determine_target_class(self) -> None:
+        """
+        Figures out the target class of the application profile.
+        If not target class is present, the application profile URI is used
+        as a fallback.
+        """
+        results = self.query(
+            r"SELECT ?targetClass WHERE { ?_ sh:targetClass ?targetClass . }"
+        )
+        if len(results) != 1 or len(results[0]) != 1:
+            self._target_class = self.uri
+        else:
+            self._target_class = results[0][0]
+
     def _resolve_imports(self) -> None:
         """
         Recursively resolves owl:imports statements
@@ -750,15 +765,10 @@ class ApplicationProfile(ApplicationProfileInfo):
     def target_class(self) -> str:
         """
         Returns the target class of the application profile.
-        If not target class is present, the application profile URI is used
+        If no target class is present, the application profile URI is used
         as a fallback.
         """
-        results = self.query(
-            r"SELECT ?targetClass WHERE { ?_ sh:targetClass ?targetClass . }"
-        )
-        if len(results) != 1 or len(results[0]) != 1:
-            return self.uri
-        return results[0][0]
+        return self._target_class
 
     def query(self, query: str, **kwargs) -> list:
         """