Rewrite the nms part, fix nope error completely

src/com/cnaude/chairs/core/Chairs.java

@@ -1,7 +1,6 @@
 package com.cnaude.chairs.core;
 
 import java.io.File;
-import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
@@ -9,24 +8,21 @@ import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import org.bukkit.ChatColor;
-import org.bukkit.Location;
 import org.bukkit.Material;
-import org.bukkit.World;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.configuration.file.YamlConfiguration;
-import org.bukkit.entity.Arrow;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.java.JavaPlugin;
-import org.bukkit.util.Vector;
 
 import com.cnaude.chairs.commands.ChairsCommand;
 import com.cnaude.chairs.commands.ChairsIgnoreList;
+import com.cnaude.chairs.core.api.ChairsAPI;
 import com.cnaude.chairs.listeners.NANLoginListener;
 import com.cnaude.chairs.listeners.TrySitEventListener;
 import com.cnaude.chairs.listeners.TryUnsitEventListener;
 import com.cnaude.chairs.sitaddons.ChairEffects;
 import com.cnaude.chairs.sitaddons.CommandRestrict;
-import com.cnaude.chairs.vehiclearrow.GetVehicleArrowClass;
+import com.cnaude.chairs.vehiclearrow.NMSAccess;
 
 public class Chairs extends JavaPlugin {
     public ChairEffects chairEffects;
@@ -54,28 +50,16 @@ public class Chairs extends JavaPlugin {
     public PlayerSitData getPlayerSitData() {
     	return psitdata;
     }
-    private Class<?> vehiclearrowclass;
+    private NMSAccess nmsaccess = new NMSAccess();
-    protected Class<?> getVehicleArrowClass() {
+    protected NMSAccess getNMSAccess() {
-    	return vehiclearrowclass;
+    	return nmsaccess;
     }
 
-	GetVehicleArrowClass genvehiclearrow = new GetVehicleArrowClass();
-
     @Override
     public void onEnable() {
     	log = this.getLogger();
-    	//load vehiclearrowclass
 		try {
-	    	World world = getServer().getWorlds().get(0);
+	    	nmsaccess.setupVehicleArrow();
-	    	Arrow arrow = world.spawnArrow(new Location(world, 0, 0, 0), new Vector(0, 0, 0), 0, 0);
-	    	String arrowclass = arrow.getClass().getName();
-	    	Method getHandle;
-			getHandle = arrow.getClass().getDeclaredMethod("getHandle");
-	    	getHandle.setAccessible(true);
-	    	Class<?> entityarrow = getHandle.invoke(arrow).getClass();
-	    	Class<?> craftserver = getServer().getClass();
-	    	vehiclearrowclass = genvehiclearrow.getVehicleArrowClass(arrowclass, entityarrow, craftserver);
-	    	arrow.remove();
 		} catch (Exception e) {
 			e.printStackTrace();
 			log.severe("Failed to generate VehicleArrow class, exiting");
@@ -100,24 +84,26 @@ public class Chairs extends JavaPlugin {
         getServer().getPluginManager().registerEvents(new TryUnsitEventListener(this), this);
         getServer().getPluginManager().registerEvents(new CommandRestrict(this), this);
         getCommand("chairs").setExecutor(new ChairsCommand(this, ignoreList));
+        new ChairsAPI(getPlayerSitData());
     }
 
     @Override
     public void onDisable() {
     	for (Player player : getServer().getOnlinePlayers()) {
     		if (psitdata.isSitting(player)) {
-    			psitdata.unSitPlayer(player, false, true);
+    			psitdata.unsitPlayerNow(player);
     		}
     	}
         if (ignoreList != null) {
             ignoreList.save();
         }
-        chairEffects.cancelHealing();
+        if (chairEffects != null) {
-        chairEffects.cancelPickup();
+		    chairEffects.cancelHealing();
-        chairEffects = null;
+		    chairEffects.cancelPickup();
+		    chairEffects = null;
+        }
         log = null;
-        genvehiclearrow = null;
+        nmsaccess = null;
-        vehiclearrowclass = null;
         psitdata = null;
     }
 

src/com/cnaude/chairs/core/PlayerSitData.java

@@ -1,9 +1,6 @@
 package com.cnaude.chairs.core;
 
-import java.lang.reflect.Constructor;
-import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
 import java.util.HashMap;
 
 import org.bukkit.Bukkit;
@@ -11,7 +8,6 @@ import org.bukkit.Location;
 import org.bukkit.block.Block;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
-import org.bukkit.util.Vector;
 
 public class PlayerSitData {
 
@@ -28,14 +24,6 @@ public class PlayerSitData {
 	public boolean isSitting(Player player) {
 		return sit.containsKey(player.getName());
 	}
-	public boolean isAroowOccupied(Entity entity) {
-		for (Entity usedentity : sit.values()) {
-			if (usedentity.getEntityId() == entity.getEntityId()) {
-				return true;
-			}
-		}
-		return false;
-	}
 	public boolean isBlockOccupied(Block block) {
 		return sitblock.containsKey(block);
 	}
@@ -70,8 +58,7 @@ public class PlayerSitData {
     	},1000,1000);
     	sittask.put(player.getName(), task);
     }
-    public void reSitPlayer(final Player player)
+    public void reSitPlayer(final Player player) {
-    {
     	try {
 	    	final Entity prevarrow = sit.get(player.getName());
 	    	sit.remove(player.getName());
@@ -91,31 +78,31 @@ public class PlayerSitData {
     	}
     }
     private Entity sitPlayerOnArrow(Player player, Location arrowloc) throws NoSuchMethodException, SecurityException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException, InstantiationException, InvocationTargetException {
-        Entity arrow = player.getWorld().spawnArrow(arrowloc, new Vector(0, 0 ,0), 0, 0);
+        Entity arrow = plugin.getNMSAccess().spawnArrow(arrowloc);
-        Method getHandleMethod = arrow.getClass().getDeclaredMethod("getHandle");
-        getHandleMethod.setAccessible(true);
-        Object nmsarrow = getHandleMethod.invoke(arrow);
-        Field bukkitEntityField = nmsarrow.getClass().getSuperclass().getDeclaredField("bukkitEntity");
-        bukkitEntityField.setAccessible(true);
-        Constructor<?> ctor = plugin.getVehicleArrowClass().getDeclaredConstructor(Bukkit.getServer().getClass(), nmsarrow.getClass());
-        ctor.setAccessible(true);
-        Object vehiclearrow = ctor.newInstance(Bukkit.getServer(), nmsarrow);
-        bukkitEntityField.set(nmsarrow, vehiclearrow);
         arrow.setPassenger(player);
 		return arrow;
     }
-    public void unSitPlayer(final Player player, boolean restoreposition, boolean correctleaveposition) {
+    public void unsitPlayerNormal(Player player) {
+    	unsitPlayer(player, false, true, false);
+    }
+    public void unsitPlayerForce(Player player) {
+    	unsitPlayer(player, true, true, false);
+    }
+    public void unsitPlayerNow(Player player) {
+    	unsitPlayer(player, true, false, true);
+    }
+    private void unsitPlayer(final Player player, boolean eject,  boolean restoreposition, boolean correctleaveposition) {
     	final Entity arrow = sit.get(player.getName());
 		sit.remove(player.getName());
-    	player.eject();
+		if (eject) {
+			player.eject();
+		}
     	arrow.remove();
     	final Location tploc = sitstopteleportloc.get(player.getName());
     	if (restoreposition) {
-    		Bukkit.getScheduler().scheduleSyncDelayedTask(plugin, new Runnable()
+    		Bukkit.getScheduler().scheduleSyncDelayedTask(plugin, new Runnable() {
-    		{
     			@Override
-				public void run()
+				public void run() {
-    			{
     	    		player.teleport(tploc);
     	    		player.setSneaking(false);
     			}

src/com/cnaude/chairs/core/api/ChairsAPI.java

@@ -0,0 +1,18 @@
+package com.cnaude.chairs.core.api;
+
+import org.bukkit.entity.Player;
+
+import com.cnaude.chairs.core.PlayerSitData;
+
+public class ChairsAPI {
+
+	private static PlayerSitData pdata;
+	public ChairsAPI(PlayerSitData pdata) {
+		ChairsAPI.pdata = pdata;
+	}
+
+	public static boolean isSitting(Player player) {
+		return pdata.isSitting(player);
+	}
+	
+}

src/com/cnaude/chairs/listeners/TryUnsitEventListener.java

@@ -1,8 +1,5 @@
 package com.cnaude.chairs.listeners;
 
-import java.util.HashSet;
-
-import org.bukkit.Bukkit;
 import org.bukkit.block.Block;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
@@ -28,7 +25,7 @@ public class TryUnsitEventListener implements Listener {
     public void onPlayerQuit(PlayerQuitEvent event) {
     	Player player = event.getPlayer();
     	if (plugin.getPlayerSitData().isSitting(player)) {
-    		plugin.getPlayerSitData().unSitPlayer(player, false, true);
+    		plugin.getPlayerSitData().unsitPlayerNow(player);
     	}
     }
 
@@ -44,27 +41,16 @@ public class TryUnsitEventListener implements Listener {
     public void onPlayerDeath(PlayerDeathEvent event) {
     	Player player = event.getEntity();
     	if (plugin.getPlayerSitData().isSitting(player)) {
-    		plugin.getPlayerSitData().unSitPlayer(player, false, false);
+    		plugin.getPlayerSitData().unsitPlayerNow(player);
     	}
     }
 
-    private HashSet<String> queueUnsit = new HashSet<String>();
     @EventHandler(priority=EventPriority.LOWEST)
     public void onExitVehicle(VehicleExitEvent e) {
     	if (e.getVehicle().getPassenger() instanceof Player) {
     		final Player player = (Player) e.getVehicle().getPassenger();
     		if (plugin.getPlayerSitData().isSitting(player)) {
-    			e.setCancelled(true);
+    			plugin.getPlayerSitData().unsitPlayerNormal(player);
-    			if (!queueUnsit.contains(player.getName())) {
-    				queueUnsit.add(player.getName());
-    				Bukkit.getScheduler().scheduleSyncDelayedTask(plugin, new Runnable() {
-    					@Override
-						public void run() {
-    						queueUnsit.remove(player.getName());
-    						plugin.getPlayerSitData().unSitPlayer(player, true, false);
-    					}
-    				});
-    			}
     		}
     	}
     }
@@ -74,7 +60,7 @@ public class TryUnsitEventListener implements Listener {
     	Block b = event.getBlock();
     	if (plugin.getPlayerSitData().isBlockOccupied(b)) {
     		Player player = plugin.getPlayerSitData().getPlayerOnChair(b);
-    		plugin.getPlayerSitData().unSitPlayer(player, true, false);
+    		plugin.getPlayerSitData().unsitPlayerForce(player);
     	}
     }
 

src/com/cnaude/chairs/vehiclearrow/GetVehicleArrowClass.java

@@ -1,20 +0,0 @@
-package com.cnaude.chairs.vehiclearrow;
-
-import org.bukkit.Bukkit;
-
-public class GetVehicleArrowClass {
-
-	private String pkgname = this.getClass().getPackage().getName();
-	private String vehiclearrowclassname = "VehicleArrow";
-	public Class<?> getVehicleArrowClass(String arrowclass, Class<?> entityarrow, Class<?> craftserver) throws Exception {
-        String packageName = Bukkit.getServer().getClass().getPackage().getName();
-        String nmspackageversion = packageName.substring(packageName.lastIndexOf('.') + 1);
-        if (nmspackageversion.equals("v1_7_R1")) {
-        	return Class.forName(pkgname+"."+"nms172"+"."+vehiclearrowclassname);
-        } else if (nmspackageversion.equals("v1_6_R3")) {
-        	return Class.forName(pkgname+"."+"nms164"+"."+vehiclearrowclassname);
-        }
-        throw new Exception("ChairsReloaded is not compatible with your server version");
-	}
-
-}

src/com/cnaude/chairs/vehiclearrow/NMSAccess.java

@@ -0,0 +1,47 @@
+package com.cnaude.chairs.vehiclearrow;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.World;
+import org.bukkit.entity.Arrow;
+
+public class NMSAccess {
+
+	private Class<?> nmsArrowClass;
+	
+	public void setupVehicleArrow() throws Exception {
+        String pkgname = getClass().getPackage().getName();
+        String packageName = Bukkit.getServer().getClass().getPackage().getName();
+        String nmspackageversion = packageName.substring(packageName.lastIndexOf('.') + 1);
+        switch (nmspackageversion) {
+        	case "v1_7_R1": {
+        		nmsArrowClass = Class.forName(pkgname+"."+"nms172"+".NMSChairsArrow");
+            	return;
+        	}
+        	case "v1_6_R3": {
+            	nmsArrowClass = Class.forName(pkgname+"."+"nms164"+".NMSChairsArrow");
+            	return;
+        	}
+        }
+        throw new Exception("ChairsReloaded is not compatible with your server version");
+	}
+	
+	public Arrow spawnArrow(Location location) throws NoSuchMethodException, SecurityException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, InstantiationException {
+		World world = location.getWorld();
+		Method getHandle = world.getClass().getDeclaredMethod("getHandle");
+		getHandle.setAccessible(true);
+		Object nmsworld = getHandle.invoke(world);
+		Constructor<?> ct = nmsArrowClass.getConstructor(nmsworld.getClass().getSuperclass());
+		ct.setAccessible(true);
+		NMSChairsArrowInterface vehiclearrow = (NMSChairsArrowInterface) ct.newInstance(nmsworld);
+		vehiclearrow.setArrowLocation(location);
+		vehiclearrow.addToWorld();
+		vehiclearrow.setBukkitEntity(Bukkit.getServer());
+		return vehiclearrow.getBukkitArrow();
+	}
+
+}

src/com/cnaude/chairs/vehiclearrow/NMSChairsArrowInterface.java

@@ -0,0 +1,17 @@
+package com.cnaude.chairs.vehiclearrow;
+
+import org.bukkit.Location;
+import org.bukkit.Server;
+import org.bukkit.entity.Arrow;
+
+public interface NMSChairsArrowInterface {
+
+	public void setBukkitEntity(Server server);
+	
+	public Arrow getBukkitArrow();
+	
+	public void setArrowLocation(Location location);
+	
+	public void addToWorld();
+
+}

src/com/cnaude/chairs/vehiclearrow/nms164/VehicleArrow.java

@@ -1,22 +0,0 @@
-package com.cnaude.chairs.vehiclearrow.nms164;
-
-import net.minecraft.server.v1_6_R3.EntityArrow;
-
-import org.bukkit.craftbukkit.v1_6_R3.CraftServer;
-import org.bukkit.craftbukkit.v1_6_R3.entity.CraftArrow;
-import org.bukkit.entity.Vehicle;
-
-public class VehicleArrow extends CraftArrow implements Vehicle {
-
-	public VehicleArrow(CraftServer server, EntityArrow entity) {
-		super(server, entity);
-	}
-
-	@Override
-	public void remove() {
-		if (isEmpty()) {
-			super.remove();
-		}
-	}
-
-}

src/com/cnaude/chairs/vehiclearrow/nms172/CraftChairsArrow.java

@@ -0,0 +1,30 @@
+package com.cnaude.chairs.vehiclearrow.nms172;
+
+import net.minecraft.server.v1_7_R1.EntityArrow;
+
+import org.bukkit.craftbukkit.v1_7_R1.CraftServer;
+import org.bukkit.craftbukkit.v1_7_R1.entity.CraftArrow;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Player;
+import org.bukkit.entity.Vehicle;
+
+import com.cnaude.chairs.core.api.ChairsAPI;
+
+public class CraftChairsArrow extends CraftArrow implements Vehicle {
+
+	public CraftChairsArrow(CraftServer server, EntityArrow entity) {
+		super(server, entity);
+	}
+
+	@Override
+	public void remove() {
+		Entity passenger = getPassenger();
+		if (passenger != null && passenger instanceof Player) {
+			if (ChairsAPI.isSitting((Player) passenger)) {
+				return;
+			}
+		}
+		super.remove();
+	}
+
+}

src/com/cnaude/chairs/vehiclearrow/nms172/NMSChairsArrow.java

@@ -0,0 +1,42 @@
+package com.cnaude.chairs.vehiclearrow.nms172;
+
+import org.bukkit.Location;
+import org.bukkit.Server;
+import org.bukkit.craftbukkit.v1_7_R1.CraftServer;
+import org.bukkit.entity.Arrow;
+
+import com.cnaude.chairs.vehiclearrow.NMSChairsArrowInterface;
+
+import net.minecraft.server.v1_7_R1.EntityArrow;
+import net.minecraft.server.v1_7_R1.World;
+
+public class NMSChairsArrow extends EntityArrow implements NMSChairsArrowInterface {
+	
+	public NMSChairsArrow(World world) {
+		super(world);
+	}
+	
+	@Override
+	public void h() {
+	}
+
+	public void setBukkitEntity(Server server) {
+		bukkitEntity = new CraftChairsArrow((CraftServer) server, this);
+	}
+
+	@Override
+	public Arrow getBukkitArrow() {
+		return (Arrow) bukkitEntity;
+	}
+
+	@Override
+	public void setArrowLocation(Location location) {
+		setPositionRotation(location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch());
+	}
+
+	@Override
+	public void addToWorld() {
+		world.addEntity(this);
+	}
+
+}

src/com/cnaude/chairs/vehiclearrow/nms172/VehicleArrow.java

@@ -1,22 +0,0 @@
-package com.cnaude.chairs.vehiclearrow.nms172;
-
-import net.minecraft.server.v1_7_R1.EntityArrow;
-
-import org.bukkit.craftbukkit.v1_7_R1.CraftServer;
-import org.bukkit.craftbukkit.v1_7_R1.entity.CraftArrow;
-import org.bukkit.entity.Vehicle;
-
-public class VehicleArrow extends CraftArrow implements Vehicle {
-
-	public VehicleArrow(CraftServer server, EntityArrow entity) {
-		super(server, entity);
-	}
-
-	@Override
-	public void remove() {
-		if (isEmpty()) {
-			super.remove();
-		}
-	}
-
-}