Merge pull request 'Add REntityServer.getPlayers, REntityServer.getEntities and REntityServer.getEntitiesByType' (#246) from PlayersAndEntitesFromREntityServer into master

Reviewed-on: #246
Reviewed-by: Lixfel <lixfel@steamwar.de>

SpigotCore_Main/src/de/steamwar/entity/REntityServer.java

@@ -33,15 +33,13 @@ import org.bukkit.event.Listener;
 import org.bukkit.event.player.PlayerMoveEvent;
 import org.bukkit.event.player.PlayerQuitEvent;
 
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Set;
+import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.BiConsumer;
 import java.util.function.BiFunction;
 import java.util.function.Consumer;
 import java.util.function.Function;
+import java.util.stream.Collectors;
 
 
 public class REntityServer implements Listener {
@@ -109,10 +107,17 @@ public class REntityServer implements Listener {
     }
 
     public void removePlayer(Player player) {
+        if (!viewDistance.containsKey(player)) {
+            return;
+        }
         forChunkInView(player, lastLocation.remove(player), (x, z) -> removePlayerFromChunk(player, x, z));
         viewDistance.remove(player);
     }
 
+    public List<Player> getPlayers() {
+        return new ArrayList<>(viewDistance.keySet());
+    }
+
     public void close() {
         TinyProtocol.instance.removeFilter(useEntity, filter);
         for(Player player : lastLocation.keySet().toArray(new Player[0])) {
@@ -159,6 +164,14 @@ public class REntityServer implements Listener {
         entityMap.remove(entity.entityId);
     }
 
+    public List<REntity> getEntities() {
+        return new ArrayList<>(entityMap.values());
+    }
+
+    public <T extends REntity> List<T> getEntitiesByType(Class<T> clazz) {
+        return entityMap.values().stream().filter(clazz::isInstance).map(clazz::cast).collect(Collectors.toList());
+    }
+
     private void addEntityToChunk(REntity entity) {
         entities.computeIfAbsent(entityToId(entity), i -> new HashSet<>()).add(entity);
     }