Add STTL export phase using Corese-Python and Py4j

tetras_extraction/macao_12/script/requirements.txt

@@ -2,6 +2,7 @@ cssselect==1.2.0
 esprima==4.0.1
 isodate==0.6.1
 lxml==5.2.2
+py4j==0.10.9.7
 pyparsing==3.1.2
 rdflib==7.0.0
 six==1.16.0

tetras_extraction/macao_12/script/src/export.py

+# type: ignore
+# (because py4j has no stubs and pretty much breaks type checkers)
+
+import atexit
+import subprocess
+from time import sleep
+
+from py4j.java_gateway import JavaGateway
+
+from common import *
+
+gateway_cmd = ["java", "-jar", "corese-library-python-4.5.0.jar"]
+
+
+# Stop Java gateway when exiting script
+def exit_handler(gateway):
+    if gateway is not None:
+        gateway.shutdown()
+        print("\nGateway server stopped.")
+    else:
+        subprocess.run(["pkill", "--exact", "--full", " ".join(gateway_cmd)])
+        print("\nGateway server killed.")
+
+
+def main():
+    # Start Java gateway
+    java_process = subprocess.Popen(gateway_cmd)
+    sleep(1)
+    gateway = JavaGateway()
+    atexit.register(exit_handler, gateway)
+    # Import Java classes
+    Graph = gateway.jvm.fr.inria.corese.core.Graph
+    Load = gateway.jvm.fr.inria.corese.core.load.Load
+    Property = gateway.jvm.fr.inria.corese.core.util.Property
+    QueryProcess = gateway.jvm.fr.inria.corese.core.query.QueryProcess
+    RDF = gateway.jvm.fr.inria.corese.core.logic.RDF
+    Transformer = gateway.jvm.fr.inria.corese.core.transform.Transformer
+
+    # Create graph, load Turtle files for schema and content
+    graph = Graph()
+    ld = Load.create(graph)
+    Property.set(Property.Value.DISABLE_OWL_AUTO_IMPORT, True)
+    ld.parse(SCHEMA_FILE)
+    ld.parse(RESULT_FILE)
+
+    # Run STTL transformation
+    tr = Transformer.create(graph, MODULE_DIR + "/../templates/")
+    result = tr.transform()
+
+    print(result)
+
+
+if __name__ == "__main__":
+    main()

tetras_extraction/macao_12/script/src/extract.py

@@ -31,7 +31,7 @@ def create_graph() -> Graph:
 
 
 def export_graph(g: Graph):
-    """Exports the graph to `OUT_FILE`, with OWL imports to include
+    """Exports the graph to `RESULT_FILE`, with OWL imports to include
     the schema file when loaded as an ontology
     """
     this_onto = content_ontology_uri

tetras_extraction/macao_12/script/src/main.py

+import export
 import extract
 
 
 def main():
     extract.main()
     # transform.main()
-    # export.main()
+    export.main()
 
 
 if __name__ == "__main__":