Cleanup of thread.

src/engine/workthreads/DestroyCityThread.java

@@ -31,6 +31,7 @@ import engine.objects.Zone;
 import org.pmw.tinylog.Logger;
 
 import java.util.ArrayList;
+import java.util.EnumSet;
 
 public class DestroyCityThread implements Runnable {
 
@@ -50,6 +51,7 @@ public class DestroyCityThread implements Runnable {
         Guild formerGuild;
         Vector3fImmutable localCoords;
         ArrayList<Guild> subGuildList;
+        ArrayList<Building> transferSet;
 
         // Member variable assignment
 
@@ -70,21 +72,19 @@ public class DestroyCityThread implements Runnable {
             GuildManager.updateAllGuildBinds(formerGuild, null);
         }
 
-        // By losing the tree, the former owners lose all of their subguilds.
-
-        if (!formerGuild.getSubGuildList().isEmpty()) {
+        if (formerGuild.getSubGuildList().isEmpty() == false) {
 
             subGuildList = new ArrayList<>();
 
-            subGuildList.addAll(formerGuild.getSubGuildList());
+            for (Guild subGuild : formerGuild.getSubGuildList()) {
+                subGuildList.add(subGuild);
+            }
 
             for (Guild subGuild : subGuildList) {
                 formerGuild.removeSubGuild(subGuild);
             }
         }
 
-        Building tol = null;
-
         // Build list of buildings within this parent zone
 
         for (Building cityBuilding : cityZone.zoneBuildingSet) {
@@ -100,13 +100,6 @@ public class DestroyCityThread implements Runnable {
             if (cityBuilding.getBlueprint().getBuildingGroup().equals(mbEnums.BuildingGroup.BANESTONE))
                 continue;
 
-            // TOL is processed after all other structures in the city zone
-
-            if (cityBuilding.getBlueprint().getBuildingGroup().equals(mbEnums.BuildingGroup.TOL)) {
-                tol = cityBuilding;
-                continue;
-            }
-
             // All buildings are moved to a location relative
             // to their new parent zone
 
@@ -127,39 +120,31 @@ public class DestroyCityThread implements Runnable {
 
             // Remove warehouse entry if one exists.
 
-            if (cityBuilding.getBlueprint().getBuildingGroup() == mbEnums.BuildingGroup.WAREHOUSE) {
+            if (cityBuilding.getBlueprint().getBuildingGroup().equals(mbEnums.BuildingGroup.WAREHOUSE)) {
                 DbManager.WarehouseQueries.DELETE_WAREHOUSE(city.warehouse);
                 city.warehouse = null;
             }
 
-            // Destroy all remaining city assets
+            // Destroy all remaining auto-protected city assets
+
+            EnumSet<mbEnums.BuildingGroup> assetsToDestroy = EnumSet.of(mbEnums.BuildingGroup.TOL, mbEnums.BuildingGroup.BARRACK,
+                    mbEnums.BuildingGroup.SPIRE, mbEnums.BuildingGroup.SHRINE, mbEnums.BuildingGroup.WAREHOUSE);
 
-            if ((cityBuilding.getBlueprint().getBuildingGroup() == mbEnums.BuildingGroup.BARRACK)
-                    || (cityBuilding.getBlueprint().isWallPiece())
-                    || (cityBuilding.getBlueprint().getBuildingGroup() == mbEnums.BuildingGroup.SHRINE)
-                    || (cityBuilding.getBlueprint().getBuildingGroup() == mbEnums.BuildingGroup.TOL)
-                    || (cityBuilding.getBlueprint().getBuildingGroup() == mbEnums.BuildingGroup.SPIRE)
-                    || (cityBuilding.getBlueprint().getBuildingGroup() == mbEnums.BuildingGroup.WAREHOUSE)) {
+            if (assetsToDestroy.contains(cityBuilding.getBlueprint().getBuildingGroup())) {
 
                 if (cityBuilding.getRank() != -1)
                     BuildingManager.setRank(cityBuilding, -1);
             }
         }
 
-        // Destroy the tol
-
-        if (tol != null)
-            BuildingManager.setRank(tol, -1);
-
         if (city.realm != null)
             city.realm.removeCity(city.getObjectUUID());
 
         // It's now safe to delete the city zone from the database
         // which will cause a cascade delete of everything else
 
-
         if (DbManager.ZoneQueries.DELETE_ZONE(cityZone) == false) {
-            Logger.error("DestroyCityThread", "Database error when deleting city zone: " + cityZone.getObjectUUID());
+            Logger.error("DestroyCityThread", "Error when deleting city zone: " + cityZone.getObjectUUID());
             return;
         }