Retrieving ResultSets correctly

commons/src/main/java/me/totalfreedom/totalfreedommod/admin/Admin.java

@@ -4,15 +4,13 @@ import me.totalfreedom.totalfreedommod.TotalFreedomMod;
 import me.totalfreedom.totalfreedommod.player.FPlayer;
 import me.totalfreedom.totalfreedommod.rank.DisplayableGroup;
 import me.totalfreedom.totalfreedommod.rank.GroupProvider;
-import me.totalfreedom.totalfreedommod.util.FLog;
+import me.totalfreedom.totalfreedommod.sql.ResultSetProvider;
 import me.totalfreedom.totalfreedommod.util.FUtil;
 import org.apache.commons.lang.StringUtils;
 import org.bukkit.Bukkit;
 import org.bukkit.Server;
 import org.bukkit.entity.Player;
 
-import java.sql.ResultSet;
-import java.sql.SQLException;
 import java.util.*;
 
 public class Admin
@@ -32,10 +30,13 @@ public class Admin
         this.ips.add(FUtil.getIp(player));
     }
 
-    public Admin(ResultSet resultSet)
+    public Admin(ResultSetProvider resultSet)
     {
-        try
+        if (resultSet.getString("uuid") == null)
         {
+            throw new IllegalArgumentException("Failed to load admin, as the UUID is null.");
+        }
+
         this.uuid = UUID.fromString(resultSet.getString("uuid"));
         this.active = resultSet.getBoolean("active");
         this.rank = GroupProvider.fromArgument(resultSet.getString("rank")).getGroup();
@@ -45,10 +46,6 @@ public class Admin
         this.commandSpy = resultSet.getBoolean("command_spy");
         this.potionSpy = resultSet.getBoolean("potion_spy");
         this.acFormat = resultSet.getString("ac_format");
-        } catch (SQLException e)
-        {
-            FLog.severe("Failed to load admin: " + e.getMessage());
-        }
     }
 
     @Override

commons/src/main/java/me/totalfreedom/totalfreedommod/admin/AdminList.java

@@ -5,6 +5,7 @@ import com.google.common.collect.Sets;
 import me.totalfreedom.totalfreedommod.FreedomService;
 import me.totalfreedom.totalfreedommod.config.ConfigEntry;
 import me.totalfreedom.totalfreedommod.rank.GroupProvider;
+import me.totalfreedom.totalfreedommod.sql.ResultSetProvider;
 import me.totalfreedom.totalfreedommod.util.FLog;
 import me.totalfreedom.totalfreedommod.util.FUtil;
 import net.kyori.adventure.text.Component;
@@ -12,10 +13,10 @@ import org.bukkit.OfflinePlayer;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 
-import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.util.*;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
 
 public class AdminList extends FreedomService
 {
@@ -45,11 +46,19 @@ public class AdminList extends FreedomService
         allAdmins.clear();
         try
         {
-            ResultSet adminSet = plugin.sql.getAdminList();
+            ResultSetProvider adminList = plugin.sql.getAdminList();
-            while (adminSet.next())
+            AtomicInteger row = new AtomicInteger(1);
+            adminList.getAllRowsResultSet().forEach(adminSet -> {
+                try
                 {
-                tryAddAdmin(adminSet);
+                    tryAddAdmin(ResultSetProvider.fromRow(adminSet));
+                    row.set(row.get() + 1);
+                } catch (Throwable e)
+                {
+                    FLog.warning("An error occurred whilst reading the admin entry at row #" + row.get());
+                    FLog.warning(e);
                 }
+            });
         } catch (SQLException e)
         {
             FLog.severe("Failed to load admin list: " + e.getMessage());
@@ -59,17 +68,10 @@ public class AdminList extends FreedomService
         FLog.info("Loaded " + allAdmins.size() + " admins (" + uuidTable.size() + " active, " + ipTable.size() + " IPs)");
     }
 
-    private void tryAddAdmin(ResultSet adminSet) throws SQLException
+    private void tryAddAdmin(ResultSetProvider adminSet)
-    {
-        try
     {
             Admin admin = new Admin(adminSet);
             allAdmins.add(admin);
-        } catch (Throwable ex)
-        {
-            FLog.warning("An error occurred whilst reading the admin entry at row #" + adminSet.getRow());
-            FLog.warning(ex);
-        }
     }
 
     public void messageAllAdmins(Component message)
@@ -263,7 +265,7 @@ public class AdminList extends FreedomService
     {
         try
         {
-            ResultSet currentSave = plugin.sql.getAdminByUuid(admin.getUuid());
+            ResultSetProvider currentSave = plugin.sql.getAdminByUuid(admin.getUuid());
             for (Map.Entry<String, Object> entry : admin.toSQLStorable().entrySet())
             {
                 Object storedValue = plugin.sql.getValue(currentSave, entry.getKey(), entry.getValue());

commons/src/main/java/me/totalfreedom/totalfreedommod/banning/BanManager.java

@@ -2,17 +2,8 @@ package me.totalfreedom.totalfreedommod.banning;
 
 import com.google.common.collect.Maps;
 import com.google.common.collect.Sets;
-import java.sql.ResultSet;
-import java.sql.SQLException;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.Date;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.UUID;
 import me.totalfreedom.totalfreedommod.FreedomService;
+import me.totalfreedom.totalfreedommod.sql.ResultSetProvider;
 import me.totalfreedom.totalfreedommod.util.FLog;
 import me.totalfreedom.totalfreedommod.util.FUtil;
 import org.bukkit.entity.Player;
@@ -21,6 +12,9 @@ import org.bukkit.event.EventPriority;
 import org.bukkit.event.player.PlayerJoinEvent;
 import org.bukkit.event.player.PlayerLoginEvent;
 
+import java.sql.SQLException;
+import java.util.*;
+
 public class BanManager extends FreedomService
 {
 
@@ -36,10 +30,8 @@ public class BanManager extends FreedomService
         bans.clear();
         try
         {
-            ResultSet banSet = plugin.sql.getBanList();
+            plugin.sql.getBanList().getAllRowsResultSet().forEach(row -> {
-            {
+                ResultSetProvider banSet = ResultSetProvider.fromRow(row);
-                while (banSet.next())
-                {
                 String name = banSet.getString("name");
                 UUID uuid = null;
                 String strUUID = banSet.getString("uuid");
@@ -54,10 +46,8 @@ public class BanManager extends FreedomService
                 String reason = banSet.getString("reason");
                 Ban ban = new Ban(name, uuid, ips, by, at, expires, reason);
                 bans.add(ban);
-                }
+            });
-            }
+        } catch (SQLException e)
-        }
-        catch (SQLException e)
         {
             FLog.severe("Failed to load ban list: " + e.getMessage());
         }
@@ -186,8 +176,7 @@ public class BanManager extends FreedomService
         if (ban.getUsername() != null && getByUsername(ban.getUsername()) != null)
         {
             removeBan(ban);
-        }
+        } else
-        else
         {
 
             for (String ip : ban.getIps())
@@ -267,8 +256,7 @@ public class BanManager extends FreedomService
         if (ban != null)
         {
             removeBan(ban);
-        }
+        } else
-        else
         {
             ban = getByIp(FUtil.getIp(player));
             if (ban != null)

commons/src/main/java/me/totalfreedom/totalfreedommod/player/PlayerData.java

@@ -4,6 +4,7 @@ import com.google.common.base.Strings;
 import com.google.common.collect.Lists;
 import me.totalfreedom.totalfreedommod.api.ShopItem;
 import me.totalfreedom.totalfreedommod.util.FConverter;
+import me.totalfreedom.totalfreedommod.sql.ResultSetProvider;
 import me.totalfreedom.totalfreedommod.util.FLog;
 import me.totalfreedom.totalfreedommod.util.FUtil;
 import net.kyori.adventure.text.Component;
@@ -44,7 +45,7 @@ public class PlayerData
 
     private Boolean inspect = false;
 
-    public PlayerData(ResultSet resultSet)
+    public PlayerData(ResultSetProvider resultSet)
     {
         try
         {
@@ -71,7 +72,7 @@ public class PlayerData
             loginMessage = tempLoginMessage;
             //--
             inspect = resultSet.getBoolean("inspect");
-        } catch (SQLException e)
+        } catch (Throwable e)
         {
             FLog.severe("Failed to load player: " + e.getMessage());
             e.printStackTrace();

commons/src/main/java/me/totalfreedom/totalfreedommod/player/PlayerList.java

@@ -5,6 +5,7 @@ import me.totalfreedom.totalfreedommod.FreedomService;
 import me.totalfreedom.totalfreedommod.admin.Admin;
 import me.totalfreedom.totalfreedommod.config.ConfigEntry;
 import me.totalfreedom.totalfreedommod.rank.GroupProvider;
+import me.totalfreedom.totalfreedommod.sql.ResultSetProvider;
 import me.totalfreedom.totalfreedommod.util.FLog;
 import me.totalfreedom.totalfreedommod.util.FUtil;
 import org.bukkit.OfflinePlayer;
@@ -42,24 +43,17 @@ public class PlayerList extends FreedomService
 
     public void loadMasterBuilders()
     {
-        ResultSet resultSet = plugin.sql.getMasterBuilders();
+        ResultSetProvider resultSet = plugin.sql.getMasterBuilders();
 
         if (resultSet == null)
         {
             return;
         }
 
-        try
+        resultSet.getAllRowsResultSet().forEach(row -> {
-        {
+            PlayerData playerData = load(ResultSetProvider.fromRow(row));
-            while (resultSet.next())
-            {
-                PlayerData playerData = load(resultSet);
             dataMap.put(playerData.getUuid(), playerData);
-            }
+        });
-        } catch (SQLException e)
-        {
-            FLog.severe("Failed to parse master builders: " + e.getMessage());
-        }
     }
 
     public String getIp(OfflinePlayer player)
@@ -128,12 +122,13 @@ public class PlayerList extends FreedomService
         return load(plugin.sql.getPlayerByIp(ip));
     }
 
-    public PlayerData load(ResultSet resultSet)
+    public PlayerData load(ResultSetProvider resultSet)
     {
         if (resultSet == null)
         {
             return null;
         }
+
         return new PlayerData(resultSet);
     }
 
@@ -149,7 +144,7 @@ public class PlayerList extends FreedomService
     {
         try
         {
-            ResultSet currentSave = plugin.sql.getPlayerByUuid(player.getUuid());
+            ResultSetProvider currentSave = plugin.sql.getPlayerByUuid(player.getUuid());
             for (Map.Entry<String, Object> entry : player.toSQLStorable().entrySet())
             {
                 Object storedValue = plugin.sql.getValue(currentSave, entry.getKey(), entry.getValue());

commons/src/main/java/me/totalfreedom/totalfreedommod/sql/ResultSetProvider.java

@@ -0,0 +1,114 @@
+package me.totalfreedom.totalfreedommod.sql;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Wrapper;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.BiConsumer;
+import java.util.function.Consumer;
+
+public class ResultSetProvider
+{
+    List<Map<String, Object>> allRowsResultSet = new ArrayList<>();
+
+    Map<String, Object> singularResultMap = new HashMap<>();
+
+    private ResultSetProvider(Map<String, Object> singularResultMap)
+    {
+        this.singularResultMap = singularResultMap;
+    }
+
+    private ResultSetProvider(ResultSet resultSet, boolean allRows) throws SQLException
+    {
+        if (allRows)
+        {
+            while (resultSet.next())
+            {
+                allRowsResultSet.add(mapResultSet(resultSet));
+            }
+        } else
+        {
+            if (resultSet.next())
+            {
+                this.singularResultMap = mapResultSet(resultSet);
+            }
+        }
+    }
+
+    public static CompletableFuture<ResultSetProvider> provideAllRows(ResultSet resultSet)
+    {
+        return CompletableFuture.supplyAsync(() ->
+        {
+            try
+            {
+                return new ResultSetProvider(resultSet, true);
+            } catch (SQLException e)
+            {
+                return null;
+            }
+        });
+    }
+
+    public static CompletableFuture<ResultSetProvider> provideSpecificRow(ResultSet resultSet) throws SQLException
+    {
+        return CompletableFuture.supplyAsync(() -> {
+            try
+            {
+                return new ResultSetProvider(resultSet, false);
+            } catch (SQLException e)
+            {
+                throw new RuntimeException(e); // We don't want to handle this exception, we want the delegate to handle it instead.
+            }
+        });
+    }
+
+    public static ResultSetProvider fromRow(Map<String, Object> row) {
+        return new ResultSetProvider(row);
+    }
+
+    public List<Map<String, Object>> getAllRowsResultSet()
+    {
+        return allRowsResultSet;
+    }
+
+    private Map<String, Object> mapResultSet(ResultSet rs) throws SQLException
+    {
+        Map<String, Object> result = new HashMap<>();
+        while (rs.next())
+        {
+            int columns = rs.getMetaData().getColumnCount();
+            for (int i = 1; i <= columns; i++)
+            {
+                String columnName = rs.getMetaData().getColumnName(i);
+                Object columnValue = rs.getObject(i);
+                result.put(columnName, columnValue);
+            }
+        }
+        return result;
+    }
+
+    public String getString(String key)
+    {
+        return (String) singularResultMap.get(key);
+    }
+
+    public int getInt(String key)
+    {
+        return (int) singularResultMap.get(key);
+    }
+
+    public boolean getBoolean(String key)
+    {
+        return (boolean) singularResultMap.get(key);
+    }
+
+    public long getLong(String key)
+    {
+        return (long) singularResultMap.get(key);
+    }
+}

commons/src/main/java/me/totalfreedom/totalfreedommod/sql/SQLite.java

@@ -125,14 +125,20 @@ public class SQLite extends FreedomService
         }
     }
 
-    public ResultSet getBanList() throws SQLException
+    public ResultSetProvider getBanList() throws SQLException
     {
-        return connection.prepareStatement("SELECT * FROM bans").executeQuery();
+        try (PreparedStatement statement = connection.prepareStatement("SELECT * FROM bans"))
+        {
+            return ResultSetProvider.provideAllRows(statement.executeQuery()).join();
+        }
     }
 
-    public ResultSet getAdminList() throws SQLException
+    public ResultSetProvider getAdminList() throws SQLException
     {
-        return connection.prepareStatement("SELECT * FROM admins").executeQuery();
+        try (PreparedStatement statement = connection.prepareStatement("SELECT * FROM bans"))
+        {
+            return ResultSetProvider.provideAllRows(statement.executeQuery()).join();
+        }
     }
 
     public void setAdminValue(Admin admin, String key, Object value)
@@ -191,21 +197,21 @@ public class SQLite extends FreedomService
         return statement;
     }
 
-    public Object getValue(ResultSet resultSet, String key, Object value) throws SQLException
+    public Object getValue(ResultSetProvider provider, String key, Object value) throws SQLException
     {
         Object result = null;
         if (value instanceof String)
         {
-            result = resultSet.getString(key);
+            result = provider.getString(key);
         } else if (value instanceof Integer)
         {
-            result = resultSet.getInt(key);
+            result = provider.getInt(key);
         } else if (value instanceof Boolean)
         {
-            result = resultSet.getObject(key);
+            result = provider.getBoolean(key);
         } else if (value instanceof Long)
         {
-            result = resultSet.getLong(key);
+            result = provider.getLong(key);
         }
         return result;
     }
@@ -256,17 +262,12 @@ public class SQLite extends FreedomService
         }
     }
 
-    public ResultSet getAdminByUuid(UUID uuid)
+    public ResultSetProvider getAdminByUuid(UUID uuid)
     {
-        try
+        try (PreparedStatement statement = connection.prepareStatement("SELECT * FROM admins WHERE uuid=?"))
         {
-            PreparedStatement statement = connection.prepareStatement("SELECT * FROM admins WHERE uuid=?");
             statement.setString(1, uuid.toString());
-            ResultSet resultSet = statement.executeQuery();
+            return ResultSetProvider.provideSpecificRow(statement.executeQuery()).join();
-            if (resultSet.next())
-            {
-                return resultSet;
-            }
         } catch (SQLException e)
         {
             FLog.severe("Failed to get admin by name:");
@@ -276,18 +277,12 @@ public class SQLite extends FreedomService
         return null;
     }
 
-    public ResultSet getPlayerByUuid(UUID uuid)
+    public ResultSetProvider getPlayerByUuid(UUID uuid)
     {
-        try
+        try (PreparedStatement statement = connection.prepareStatement("SELECT * FROM players WHERE uuid=?"))
         {
-            PreparedStatement statement = connection.prepareStatement("SELECT * FROM players WHERE uuid=?");
             statement.setString(1, uuid.toString());
-                    ResultSet resultSet = statement.executeQuery();
+            return ResultSetProvider.provideSpecificRow(statement.executeQuery()).join();
-
-            if (resultSet.next())
-            {
-                return resultSet;
-            }
         } catch (SQLException e)
         {
             FLog.severe("Failed to get player by UUID:");
@@ -297,11 +292,11 @@ public class SQLite extends FreedomService
         return null;
     }
 
-    public ResultSet getMasterBuilders()
+    public ResultSetProvider getMasterBuilders()
     {
-        try
+        try (PreparedStatement statement = connection.prepareStatement("SELECT * FROM players WHERE master_builder=true"))
         {
-            return connection.prepareStatement("SELECT * FROM players WHERE master_builder=true").executeQuery();
+            return ResultSetProvider.provideAllRows(statement.executeQuery()).join();
         } catch (SQLException e)
         {
             FLog.severe("Failed to get Master Builders:");
@@ -311,17 +306,12 @@ public class SQLite extends FreedomService
         return null;
     }
 
-    public ResultSet getPlayerByIp(String ip)
+    public ResultSetProvider getPlayerByIp(String ip)
     {
-        try
+        try (PreparedStatement statement = connection.prepareStatement("SELECT * FROM players WHERE ips LIKE %?%"))
         {
-            PreparedStatement statement = connection.prepareStatement("SELECT * FROM players WHERE ips LIKE %?%");
             statement.setString(1, ip);
-            ResultSet resultSet = statement.executeQuery();
+            return ResultSetProvider.provideSpecificRow(statement.executeQuery()).join();
-            if (resultSet.next())
-            {
-                return resultSet;
-            }
         } catch (SQLException e)
         {
             FLog.severe("Failed to get player by ip:");