Implement EndGateway#getExitLocation and EndGateway#setExitLocation(Location)

nms-patches/TileEntityEndGateway.patch

@@ -1,6 +1,6 @@
 --- a/net/minecraft/server/TileEntityEndGateway.java
 +++ b/net/minecraft/server/TileEntityEndGateway.java
-@@ -5,6 +5,10 @@
+@@ -5,13 +5,17 @@
  import java.util.Random;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
@@ -11,6 +11,14 @@
  
  public class TileEntityEndGateway extends TileEntity implements ITickable {
  
+     private static final Logger a = LogManager.getLogger();
+     private long f = 0L;
+     private int g = 0;
+-    private BlockPosition h;
++    public BlockPosition h; // PAIL private to public
+     private boolean i;
+ 
+     public TileEntityEndGateway() {}
 @@ -103,6 +107,26 @@
              if (this.h != null) {
                  BlockPosition blockposition = this.i ? this.h : this.j();

src/main/java/org/bukkit/craftbukkit/block/CraftEndGateway.java

@@ -1,6 +1,8 @@
 package org.bukkit.craftbukkit.block;
 
+import net.minecraft.server.BlockPosition;
 import net.minecraft.server.TileEntityEndGateway;
+import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.block.Block;
 import org.bukkit.block.EndGateway;
@@ -8,19 +10,38 @@ import org.bukkit.craftbukkit.CraftWorld;
 
 public class CraftEndGateway extends CraftBlockState implements EndGateway {
 
-    private TileEntityEndGateway gateway;
+    private final CraftWorld world;
+    private final TileEntityEndGateway gateway;
 
     public CraftEndGateway(Block block) {
         super(block);
 
-        CraftWorld world = (CraftWorld) block.getWorld();
+        world = (CraftWorld) block.getWorld();
         gateway = (TileEntityEndGateway) world.getTileEntityAt(getX(), getY(), getZ());
     }
 
     public CraftEndGateway(final Material material, TileEntityEndGateway te) {
         super(material);
+        world = null;
         this.gateway = te;
     }
+    
+    @Override
+    public Location getExitLocation() {
+        BlockPosition pos = gateway.h; // PAIL: Rename exitLocation
+        return pos == null ? null : new Location(world, pos.getX(), pos.getY(), pos.getZ());
+    }
+
+    @Override
+    public void setExitLocation(Location location) {
+        if (location == null) {
+            gateway.h = null;
+        } else if (location.getWorld() != world) {
+            throw new IllegalArgumentException("Cannot set exit location to different world");
+        } else {
+            gateway.h = new BlockPosition(location.getBlockX(), location.getBlockY(), location.getBlockZ());
+        }
+    }
 
     @Override
     public boolean update(boolean force, boolean applyPhysics) {