Solved Messing around with reflection...

Hey guys I am currently trying to use reflection instead of NMS code, but it seems that it isn't working and I don't understand why :/ Here's my code:

Code:

public Object getItemStack(ItemStack i) throws ClassNotFoundException, NoSuchMethodException, SecurityException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
        Class<?> craftItemStack = Class.forName(plugin.getServer().getClass().getPackage().getName() + ".inventory.CraftItemStack");
        for (Method m : craftItemStack.getMethods()) {
            if (m.getName().equals("asNMSCopy") && m.getParameterTypes().length == 1) {
                return m.invoke(i); //Line 292
            }
        }
        return null;
    }

That's the error I get:

Code:

2013-04-12 15:51:12 [SEVERE] java.lang.IllegalArgumentException: wrong number of arguments
2013-04-12 15:51:12 [SEVERE]    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2013-04-12 15:51:12 [SEVERE]    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2013-04-12 15:51:12 [SEVERE]    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2013-04-12 15:51:12 [SEVERE]    at java.lang.reflect.Method.invoke(Unknown Source)
2013-04-12 15:51:12 [SEVERE]    at com.DarkBlade12.EnchantPlus.Listener.EnchantingListener.getItemStack(EnchantingListener.java:292)
2013-04-12 15:51:12 [SEVERE]    at com.DarkBlade12.EnchantPlus.Listener.EnchantingListener.showCurrentlyEnchanting(EnchantingListener.java:308)
2013-04-12 15:51:12 [SEVERE]    at com.DarkBlade12.EnchantPlus.Listener.EnchantingListener.onInventoryClick(EnchantingListener.java:82)
2013-04-12 15:51:12 [SEVERE]    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2013-04-12 15:51:12 [SEVERE]    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2013-04-12 15:51:12 [SEVERE]    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2013-04-12 15:51:12 [SEVERE]    at java.lang.reflect.Method.invoke(Unknown Source)
2013-04-12 15:51:12 [SEVERE]    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
2013-04-12 15:51:12 [SEVERE]    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
2013-04-12 15:51:12 [SEVERE]    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
2013-04-12 15:51:12 [SEVERE]    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
2013-04-12 15:51:12 [SEVERE]    at net.minecraft.server.v1_5_R2.PlayerConnection.a(PlayerConnection.java:1177)
2013-04-12 15:51:12 [SEVERE]    at net.minecraft.server.v1_5_R2.Packet102WindowClick.handle(SourceFile:31)
2013-04-12 15:51:12 [SEVERE]    at net.minecraft.server.v1_5_R2.NetworkManager.b(NetworkManager.java:292)
2013-04-12 15:51:12 [SEVERE]    at net.minecraft.server.v1_5_R2.PlayerConnection.d(PlayerConnection.java:110)
2013-04-12 15:51:12 [SEVERE]    at net.minecraft.server.v1_5_R2.ServerConnection.b(SourceFile:35)
2013-04-12 15:51:12 [SEVERE]    at net.minecraft.server.v1_5_R2.DedicatedServerConnection.b(SourceFile:30)
2013-04-12 15:51:12 [SEVERE]    at net.minecraft.server.v1_5_R2.MinecraftServer.r(MinecraftServer.java:580)
2013-04-12 15:51:12 [SEVERE]    at net.minecraft.server.v1_5_R2.DedicatedServer.r(DedicatedServer.java:225)
2013-04-12 15:51:12 [SEVERE]    at net.minecraft.server.v1_5_R2.MinecraftServer.q(MinecraftServer.java:476)
2013-04-12 15:51:12 [SEVERE]    at net.minecraft.server.v1_5_R2.MinecraftServer.run(MinecraftServer.java:409)
2013-04-12 15:51:12 [SEVERE]    at net.minecraft.server.v1_5_R2.ThreadServerApplication.run(SourceFile:573)

 

the first argument at invoke is excepted the instance where the methode is excuted on, not the first argument to pass

 

Try this.

return m.invoke(this, i);

ferrybig
Ah, just a moment faster than me

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Thanks for your help ferrybig, Hellsing, works now