Added the possibility to override the computation of weights on edges

Author: ArnauPrat

src/main/java/ldbc/snb/datagen/generator/LDBCDatagen.java

@@ -62,7 +62,12 @@ public static synchronized void init (Configuration conf) {
             DatagenParams.readConf(conf);
             Dictionaries.loadDictionaries(conf);
             SN.initialize();
-            Person.personSimilarity = new GeoDistanceSimilarity();
+            try {
+                Person.personSimilarity = (Person.PersonSimilarity) Class.forName(conf.get("ldbc.snb.datagen.generator.person.similarity")).newInstance();
+            } catch(Exception e) {
+                System.err.println("Error while loading person similarity class");
+                System.err.println(e.getMessage());
+            }
             initialized = true;
         }
     }

src/main/java/ldbc/snb/datagen/util/ConfigParser.java

@@ -50,6 +50,7 @@ public static Configuration initialize() {
         conf.set("ldbc.snb.datagen.serializer.dateFormatter", "ldbc.snb.datagen.serializer.formatter.StringDateFormatter");
         conf.set("ldbc.snb.datagen.serializer.formatter.StringDateFormatter.dateTimeFormat", "yyyy-MM-dd'T'HH:mm:ss.SSSZ");
         conf.set("ldbc.snb.datagen.serializer.formatter.StringDateFormatter.dateFormat", "yyyy-MM-dd");
+        conf.set("ldbc.snb.datagen.generator.person.similarity", "ldbc.snb.datagen.objects.similarity.GeoDistanceSimilarity");
 
         /** Loading predefined Scale Factors **/