improved anonymization

src/main/java/de/anxietyprime/swajodel/JodelPost.java

@@ -35,21 +35,16 @@ public class JodelPost {
     public Optional<Long> parent = Optional.empty();
 
     // anonymize function to recursively anonymize the posts
-    public void anonymize(Optional<Vector<Long>> idCache) {
-        // check if this is the first post in this process
-        if (idCache.isEmpty()) {
-            // create a new Vector as cache
-            idCache = Optional.of(new Vector<>());
-        }
+    public void anonymize(Vector<Long> idCache) {
 
         // get the anonymized id as index in cached authorIDs
-        int i = idCache.get().indexOf(this.authorID);
+        int i = idCache.indexOf(this.authorID);
         // if the index is -1 the authorID has not been cached jet
         if (i == -1) {
             // set the current anonymousID as length of the cache (== next index)
-            this.anonymousID = (long) idCache.get().size();
+            this.anonymousID = (long) idCache.size();
             // push the current authorID to to cache
-            idCache.get().add(this.authorID);
+            idCache.add(this.authorID);
         }
         // the authorID has been anonymized once before, so we can get it from cache
         else this.anonymousID = (long) i;