Replaced doubly linked list structure with ArrayList refrence, for tnt history

BauSystem_Main/src/de/steamwar/bausystem/features/tracer/Recorder.java

@@ -60,7 +60,7 @@ public class Recorder implements Listener {
     /**
      * Maps a tracked tnt entity to the last record taken of it
      */
-    private final Map<TNTPrimed, TNTRecord> lastRecordMap = new HashMap<>();
+    private final Map<TNTPrimed, List<TNTRecord>> historyMap = new HashMap<>();
 
     public Recorder(){
         BauSystem.runTaskTimer(BauSystem.getInstance(), this::record, 0, 1);
@@ -86,11 +86,9 @@ public class Recorder implements Listener {
 
         activeTraces.remove(region);
         for(TNTPrimed tnt : trackedTNT.getOrDefault(region, Collections.emptyList()))
-            lastRecordMap.remove(tnt);
+            historyMap.remove(tnt);
 
         trackedTNT.put(region, new ArrayList<>());
-
-
     }
 
     /** Internal methode to record all tracked TNT Entities
@@ -112,13 +110,14 @@ public class Recorder implements Listener {
      * @param trace trace to record the tnt for
      */
    private void record(TNTPrimed tntPrimed, Trace trace){
-       TNTRecord lastRecord = lastRecordMap.getOrDefault(tntPrimed, null);
+       List<TNTRecord> history = historyMap.getOrDefault(tntPrimed, new ArrayList<>());
 
-       TNTRecord record = new TNTRecord(tntPrimed, tntPrimed.getFuseTicks() == 0, TPSUtils.currentTick.get() - trace.getStartTime(), lastRecord);
-       if(lastRecord != null)
-           lastRecord.setNext(record);
+       if(historyMap.size() == 0)
+           historyMap.put(tntPrimed, history);
+
+       TNTRecord record = new TNTRecord(tntPrimed, tntPrimed.getFuseTicks() == 0, TPSUtils.currentTick.get() - trace.getStartTime(), history);
+        history.add(record);
 
-       lastRecordMap.put(tntPrimed, record);
        trace.add(record);
    }
 

BauSystem_Main/src/de/steamwar/bausystem/features/tracer/TNTRecord.java

@@ -24,6 +24,9 @@ import org.bukkit.Location;
 import org.bukkit.entity.TNTPrimed;
 import org.bukkit.util.Vector;
 
+import java.util.List;
+import java.util.Optional;
+
 @Getter
 public class TNTRecord {
     /**
@@ -52,31 +55,29 @@ public class TNTRecord {
     private final Vector velocity;
 
     /**
-     * Reference to the last record having been taken of the tnt represented by this record
+     * List of all tnt records, that are represent the same tnt
      */
-    private final TNTRecord previous;
+    private final List<TNTRecord> history;
 
-    /**
-     * Reference to the next record of the tnt represented by this record
-     */
-    private TNTRecord next;
-
-    public TNTRecord(TNTPrimed tnt, boolean explosion, long ticksSinceStart, TNTRecord previous){
+    public TNTRecord(TNTPrimed tnt, boolean explosion, long ticksSinceStart, List<TNTRecord> history){
         this.explosion = explosion;
         this.ticksSinceStart = ticksSinceStart;
         fuse = tnt.getFuseTicks();
         location = tnt.getLocation();
         velocity = tnt.getVelocity();
-        this.previous = previous;
+        this.history = history;
     }
 
+    public Optional<TNTRecord> getNext(){
+        int index = history.indexOf(this);
 
-    /**
-     * One call only function to set next
-     * @param next
-     */
-    protected void setNext(TNTRecord next){
-        if(this.next == null) this.next = next;
+        return index == history.size() - 1 ? Optional.empty() : Optional.of(history.get(index + 1));
+    }
+
+    public Optional<TNTRecord> getPrev(){
+        int index = history.indexOf(this);
+
+        return index == 0 ? Optional.empty() : Optional.of(history.get(index - 1));
     }
 
     @Override