Generalized toMultiMap method. Minor code style.

Author: LorenzBuehmann

sansa-inference-common/src/main/scala/net/sansa_stack/inference/utils/CollectionUtils.scala

@@ -13,7 +13,7 @@ object CollectionUtils {
     * @param tuples the tuples
     * @return the multimap
     */
-  def toMultiMap(tuples: Iterable[(String, String)]): Map[String, Set[String]] = {
+  def toMultiMap[A, B](tuples: Iterable[(A, B)]): Map[A, Set[B]] = {
     tuples.groupBy(e => e._1).mapValues(e => e.map(x => x._2).toSet).map(identity)
   }
 

sansa-inference-common/src/main/scala/net/sansa_stack/inference/utils/NTriplesStringToRDFTriple.scala

@@ -74,7 +74,7 @@ object NTriplesStringToRDFTriple {
   def main(args: Array[String]): Unit = {
     val s1 = "<> <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> ."
     val s2 = "_:genid32 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> ."
-    val s3 = "<http://example.org/a> <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> ."
+    val s3 = "<http://example.org/a> <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>  <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> ."
     val s4 = "<http://example.org/a> <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> \"3\"^^<http://ex.org/int> ."
 
     println(new NTriplesStringToRDFTriple().apply(s1))

sansa-inference-spark/src/main/scala/net/sansa_stack/inference/spark/data/loader/RDFGraphLoader.scala

@@ -46,7 +46,7 @@ object RDFGraphLoader {
 //      .repartition(minPartitions)
 
 //  logger.info("finished loading " + triples.count() + " triples in " + (System.currentTimeMillis()-startTime) + "ms.")
-    new RDFGraph(triples)
+    RDFGraph(triples)
   }
 
   /**