Get basic SPARQL to SPIN conversion to work

Author: benjaminaaron

server/build.gradle

@@ -19,6 +19,7 @@ repositories {
 
 dependencies {
 	implementation "org.springframework.boot:spring-boot-starter-web"
+	implementation("org.aksw.thirdparty.org.spinrdf:spinrdf:2.0.0-jena5-1")
 	testImplementation "org.springframework.boot:spring-boot-starter-test"
 	testRuntimeOnly "org.junit.platform:junit-platform-launcher"
 }

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

@@ -8,6 +8,10 @@ public class Controller {
 
     @GetMapping("/sparqlToSpin")
     public String sparqlToSpin(@RequestParam(name = "sparql") String sparql) {
+
+        Converter converter = new Converter();
+        converter.sparqlToSpin();
+
         return "TODO";
     }
 }

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

@@ -0,0 +1,27 @@
+package org.foerderfunke.sem_ops_server;
+import org.spinrdf.arq.ARQ2SPIN;
+import org.spinrdf.system.SPINModuleRegistry;
+import org.spinrdf.arq.ARQFactory;
+
+import org.apache.jena.rdf.model.Model;
+import org.apache.jena.rdf.model.ModelFactory;
+
+import java.io.StringWriter;
+
+public class Converter {
+
+    public void sparqlToSpin() {
+        String sparql = "SELECT * WHERE { ?s ?p ?o }";
+
+        SPINModuleRegistry.get().init();
+        Model spinModel = ModelFactory.createDefaultModel();
+
+        org.apache.jena.query.Query arqQuery = ARQFactory.get().createQuery(spinModel, sparql);
+        ARQ2SPIN converter = new ARQ2SPIN(spinModel);
+        org.spinrdf.model.Query spinQuery = converter.createQuery(arqQuery, null);
+
+        StringWriter writer = new StringWriter();
+        spinModel.write(writer, "TURTLE");
+        System.out.println(writer);
+    }
+}

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

@@ -9,5 +9,4 @@ public class SemOpsServerApplication {
 	public static void main(String[] args) {
 		SpringApplication.run(SemOpsServerApplication.class, args);
 	}
-
 }