I am writing a class for Spigot, that defines a lot of new crafting recipes. However, it seems that when I call an event, it sometime throws a Assertion Error: TRAP.
I have researched a lot, and find no useful tips, or anything.
Items.java
package com.myththewolf.omnomnom.lib;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.SkullType;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.ShapedRecipe;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.inventory.meta.SkullMeta;
public class Items {
private static HashMap<ItemStack,Integer> items = new HashMap<ItemStack,Integer>();
private static List<ShapedRecipe> itemC = new ArrayList<ShapedRecipe>();
public ItemStack setMeta(ItemStack material, String name, List<String> lore)
{
if (((material == null) || material.getType() == Material.AIR) || ((name == null && lore == null)))
{
return null;
}
ItemMeta im = material.getItemMeta();
if (name != null)
{
im.setDisplayName(name);
}
if (lore != null)
{
im.setLore(lore);
}
material.setItemMeta(im);
return material;
}
public static void makeRecipies()
{
ItemStack skull;
skull = new ItemStack(Material.SKULL_ITEM, 1, (short) SkullType.PLAYER.ordinal());
SkullMeta SM;
SM = (SkullMeta) skull.getItemMeta();
SM.setOwner("MHF_CHEST");
skull.setItemMeta(SM);
addRecipie(3, "CCC", "BAB", "CCC", skull, Material.COOKED_BEEF, Material.BREAD, Material.AIR);
for(ShapedRecipe sr : itemC)
{
Bukkit.getServer().addRecipe(sr);
}
}
public static HashMap<ItemStack,Integer> getItems()
{
return items;
}
public static void addRecipie(int hung,String patA, String patB, String patC, ItemStack out, Material a, Material b, Material c)
{
ShapedRecipe rec = new ShapedRecipe(out);
rec.shape(patA,patB,patC);
rec.setIngredient('A', a);
rec.setIngredient('B', b);
rec.setIngredient('C', c);
items.put(out, hung);
itemC.add(rec);
}
}
RightClickEvent.java
package com.myththewolf.omnomnom.event;
import java.util.HashMap;
import org.bukkit.Material;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import com.myththewolf.omnomnom.lib.Items;
public class RightClickEvent implements Listener {
@EventHandler
public void onInteractEvent(PlayerInteractEvent e)
{
Action a= e.getAction();
if(a == Action.RIGHT_CLICK_BLOCK || a== Action.RIGHT_CLICK_AIR)
{
final HashMap<ItemStack,Integer> items = Items.getItems();
if(items.containsKey(e.getItem()))
{
int foodL = e.getPlayer().getFoodLevel();
e.getPlayer().setFoodLevel(foodL + items.get(e.getItem()));
ItemStack hand = e.getPlayer().getItemInHand();
int amount = hand.getAmount();
if (amount > 1) {
hand.setAmount(amount - 1);
e.getPlayer().setItemInHand(hand);
} else {
e.getPlayer().setItemInHand(new ItemStack(Material.AIR));
}
}
}
}
}
Here is the stack trace:
[22:50:18 FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.AssertionError: TRAP
at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_101]
at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_101]
at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:47) [spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:739) [spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:675) [spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:574) [spigot.jar:git-Spigot-f950f8e-4f47972]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
Caused by: java.lang.AssertionError: TRAP
at net.minecraft.server.v1_11_R1.ItemStack.F(ItemStack.java:86) ~[spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.ItemStack.setCount(ItemStack.java:814) ~[spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.ItemStack.add(ItemStack.java:818) ~[spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.ItemStack.subtract(ItemStack.java:822) ~[spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.ItemSkull.a(ItemSkull.java:79) ~[spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.ItemStack.placeItem(ItemStack.java:152) ~[spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.PlayerInteractManager.a(PlayerInteractManager.java:491) ~[spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.PlayerConnection.a(PlayerConnection.java:897) ~[spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.PacketPlayInUseItem.a(PacketPlayInUseItem.java:37) ~[spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.PacketPlayInUseItem.a(PacketPlayInUseItem.java:1) ~[spigot.jar:git-Spigot-f950f8e-4f47972]
at net.minecraft.server.v1_11_R1.PlayerConnectionUtils$1.run(SourceFile:13) ~[spigot.jar:git-Spigot-f950f8e-4f47972]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_101]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_101]
at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:46) ~[spigot.jar:git-Spigot-f950f8e-4f47972]
... 5 more
What exactly IS this error?
Did I do something wrong?
It looks like you are allowing a block that is due to be placed to be replaced with air in the player's hand. Placing air is impossible in Minecraft, so an
AssertionErroris thrown.A solution would be to cancel the
PlayerInteractEvent