Wire up the endpoint

Author: benjaminaaron

server/src/main/java/org/foerderfunke/sem_ops_server/Controller.java

@@ -6,12 +6,10 @@
 @RestController
 public class Controller {
 
+    Converter converter = new Converter();
+
     @GetMapping("/sparqlToSpin")
     public String sparqlToSpin(@RequestParam(name = "sparql") String sparql) {
-
-        Converter converter = new Converter();
-        converter.sparqlToSpin();
-
-        return "TODO";
+        return converter.sparqlToSpin(sparql);
     }
 }

server/src/main/java/org/foerderfunke/sem_ops_server/Converter.java

@@ -1,8 +1,8 @@
 package org.foerderfunke.sem_ops_server;
+import org.apache.jena.query.Query;
 import org.apache.jena.riot.RDFDataMgr;
 import org.apache.jena.riot.RDFFormat;
 import org.spinrdf.arq.ARQ2SPIN;
-import org.spinrdf.system.SPINModuleRegistry;
 import org.spinrdf.arq.ARQFactory;
 
 import org.apache.jena.rdf.model.Model;
@@ -12,10 +12,9 @@
 
 public class Converter {
 
-    public void sparqlToSpin() {
-        String sparql = "SELECT * WHERE { ?s ?p ?o }";
+    public String sparqlToSpin(String sparql) {
+        // String sparql = "SELECT * WHERE { ?s ?p ?o }";
 
-        SPINModuleRegistry.get().init();
         Model model = ModelFactory.createDefaultModel();
         model.setNsPrefix("sp",   "http://spinrdf.org/sp#");
         model.setNsPrefix("rdf",  "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
@@ -24,12 +23,12 @@ public void sparqlToSpin() {
         model.setNsPrefix("ff",   "https://foerderfunke.org/default#");
         model.setNsPrefix("sh",   "http://www.w3.org/ns/shacl#");
 
-        org.apache.jena.query.Query arqQuery = ARQFactory.get().createQuery(model, sparql);
+        Query arqQuery = ARQFactory.get().createQuery(model, sparql);
         ARQ2SPIN converter = new ARQ2SPIN(model);
-        org.spinrdf.model.Query spinQuery = converter.createQuery(arqQuery, null);
+        converter.createQuery(arqQuery, null); // org.spinrdf.model.Query
 
         StringWriter writer = new StringWriter();
         RDFDataMgr.write(writer, model, RDFFormat.TURTLE_PRETTY);
-        System.out.println(writer);
+        return writer.toString();
     }
 }