Update SWCommandUtils SteamwarUser mapper

SpigotCore_Main/src/de/steamwar/command/SWCommandUtils.java

@@ -23,15 +23,11 @@ import de.steamwar.sql.SchematicNode;
 import de.steamwar.sql.SteamwarUser;
 import org.bukkit.Bukkit;
 import org.bukkit.GameMode;
-import org.bukkit.command.Command;
-import org.bukkit.command.CommandMap;
 import org.bukkit.command.CommandSender;
-import org.bukkit.command.SimpleCommandMap;
 import org.bukkit.entity.Player;
 
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Array;
-import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.util.*;
 import java.util.function.BiFunction;
@@ -76,7 +72,7 @@ public class SWCommandUtils {
             if (s.length() < 1) {
                 return Bukkit.getOnlinePlayers().stream().map(Player::getName).collect(Collectors.toList());
             }
-            List<SteamwarUser> steamwarUsers = SteamwarUser.startsWithName(s);
+            List<SteamwarUser> steamwarUsers = SteamwarUser.getByPrefix(s);
             return steamwarUsers.stream().map(SteamwarUser::getUserName).limit(40).collect(Collectors.toList());
         }));
         MAPPER_FUNCTIONS.put(SchematicNode.class.getTypeName(), new TypeMapper<SchematicNode>() {

SpigotCore_Main/src/de/steamwar/sql/SteamwarUser.java

@@ -26,6 +26,7 @@ import org.bukkit.entity.Player;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.util.*;
+import java.util.stream.Collectors;
 
 public class SteamwarUser {
 
@@ -37,12 +38,14 @@ public class SteamwarUser {
 	private static final Map<UUID, SteamwarUser> byUUID = new HashMap<>();
 	private static final Map<String, SteamwarUser> byName = new HashMap<>();
 	private static final Map<Integer, SteamwarUser> byId = new HashMap<>();
+	private static final Map<String, List<SteamwarUser>> byPrefix = new HashMap<>();
 
 	static{
 		Bukkit.getScheduler().runTaskTimer(Core.getInstance(), () -> {
 			byId.clear();
 			byName.clear();
 			byUUID.clear();
+			byPrefix.clear();
 		}, 72000, 72000);
 	}
 
@@ -94,14 +97,26 @@ public class SteamwarUser {
 		return bedrock;
 	}
 
-	public static List<SteamwarUser> startsWithName(String userName){
-		return startWithName.select(rs -> {
-			List<SteamwarUser> steamwarUsers = new ArrayList<>();
-			while (rs.next()) {
-				steamwarUsers.add(new SteamwarUser(rs));
-			}
-			return steamwarUsers;
-		}, userName.toLowerCase() + "%");
+	public static List<SteamwarUser> getByPrefix(String userName){
+		if (userName.length() < 2) {
+			return new ArrayList<>();
+		}
+		List<SteamwarUser> users = byPrefix.get(userName.toLowerCase().substring(0, 1));
+		if (users == null) {
+			users = startWithName.select(rs -> {
+				List<SteamwarUser> steamwarUsers = new ArrayList<>();
+				while (rs.next()) {
+					String name = rs.getString("UserName");
+					if (byName.containsKey(name)) {
+						steamwarUsers.add(byName.get(name));
+					} else {
+						steamwarUsers.add(new SteamwarUser(rs));
+					}
+				}
+				return steamwarUsers;
+			}, userName.toLowerCase() + "%");
+		}
+		return users.stream().filter(user -> user.getUserName().toLowerCase().startsWith(userName.toLowerCase())).collect(Collectors.toList());
 	}
 
 	public static SteamwarUser get(String userName){