[1.18.2] Error when attaching capabilities

Squander · August 9, 2022

Attempts to attach capabilities to the player but receives this error.

[10:27:23] [Server thread/ERROR] [ne.mi.ev.EventBus/EVENTBUS]: Exception caught during firing event: Cannot invoke "net.minecraftforge.common.util.LazyOptional.cast()" because "this.playerJoinedHandler" is null
	Index: 1
	Listeners:
		0: NORMAL
		1: ASM: class me.squander.backpack.event.AttachCapabilities onAttachCapabilities(Lnet/minecraftforge/event/AttachCapabilitiesEvent;)V
java.lang.NullPointerException: Cannot invoke "net.minecraftforge.common.util.LazyOptional.cast()" because "this.playerJoinedHandler" is null
	at TRANSFORMER/[email protected]/net.minecraft.world.entity.player.Player.getCapability(Player.java:2228)
	at TRANSFORMER/[email protected]/net.minecraftforge.common.capabilities.ICapabilityProvider.getCapability(ICapabilityProvider.java:34)
	at TRANSFORMER/[email protected]/me.squander.backpack.event.AttachCapabilities.onAttachCapabilities(AttachCapabilities.java:19)
	at net.minecraftforge.eventbus.ASMEventHandler_1_AttachCapabilities_onAttachCapabilities_AttachCapabilitiesEvent.invoke(.dynamic)
	at MC-BOOTSTRAP/[email protected]/net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85)
	at MC-BOOTSTRAP/[email protected]/net.minecraftforge.eventbus.EventBus.post(EventBus.java:302)
	at MC-BOOTSTRAP/[email protected]/net.minecraftforge.eventbus.EventBus.post(EventBus.java:283)
	at TRANSFORMER/[email protected]/net.minecraftforge.event.ForgeEventFactory.gatherCapabilities(ForgeEventFactory.java:593)
	at TRANSFORMER/[email protected]/net.minecraftforge.event.ForgeEventFactory.gatherCapabilities(ForgeEventFactory.java:587)
	at TRANSFORMER/[email protected]/net.minecraftforge.common.capabilities.CapabilityProvider.doGatherCapabilities(CapabilityProvider.java:73)
	at TRANSFORMER/[email protected]/net.minecraftforge.common.capabilities.CapabilityProvider.gatherCapabilities(CapabilityProvider.java:68)
	at TRANSFORMER/[email protected]/net.minecraftforge.common.capabilities.CapabilityProvider.gatherCapabilities(CapabilityProvider.java:52)
	at TRANSFORMER/[email protected]/net.minecraft.world.entity.Entity.<init>(Entity.java:257)
	at TRANSFORMER/[email protected]/net.minecraft.world.entity.LivingEntity.<init>(LivingEntity.java:234)
	at TRANSFORMER/[email protected]/net.minecraft.world.entity.player.Player.<init>(Player.java:172)
	at TRANSFORMER/[email protected]/net.minecraft.server.level.ServerPlayer.<init>(ServerPlayer.java:238)
	at TRANSFORMER/[email protected]/net.minecraft.server.players.PlayerList.getPlayerForLogin(PlayerList.java:412)
	at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerLoginPacketListenerImpl.handleAcceptedLogin(ServerLoginPacketListenerImpl.java:124)
	at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerLoginPacketListenerImpl.tick(ServerLoginPacketListenerImpl.java:70)
	at TRANSFORMER/[email protected]/net.minecraft.network.Connection.tick(Connection.java:267)
	at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerConnectionListener.tick(ServerConnectionListener.java:160)
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:947)
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:873)
	at TRANSFORMER/[email protected]/net.minecraft.client.server.IntegratedServer.tickServer(IntegratedServer.java:90)
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:704)
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:262)
	at java.base/java.lang.Thread.run(Thread.java:833)

[10:27:23] [Server thread/ERROR] [minecraft/ServerLoginPacketListenerImpl]: Couldn't place player in world
java.lang.NullPointerException: Cannot invoke "net.minecraftforge.common.util.LazyOptional.cast()" because "this.playerJoinedHandler" is null
	at net.minecraft.world.entity.player.Player.getCapability(Player.java:2228) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraftforge.common.capabilities.ICapabilityProvider.getCapability(ICapabilityProvider.java:34) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2378%2385!/:?] {re:classloading}
	at me.squander.backpack.event.AttachCapabilities.onAttachCapabilities(AttachCapabilities.java:19) ~[%2384!/:?] {re:classloading}
	at net.minecraftforge.eventbus.ASMEventHandler_1_AttachCapabilities_onAttachCapabilities_AttachCapabilitiesEvent.invoke(.dynamic) ~[?:?] {}
	at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85) ~[eventbus-5.0.7.jar%2310!/:?] {}
	at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302) ~[eventbus-5.0.7.jar%2310!/:?] {}
	at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283) ~[eventbus-5.0.7.jar%2310!/:?] {}
	at net.minecraftforge.event.ForgeEventFactory.gatherCapabilities(ForgeEventFactory.java:593) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2378%2385!/:?] {re:classloading}
	at net.minecraftforge.event.ForgeEventFactory.gatherCapabilities(ForgeEventFactory.java:587) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2378%2385!/:?] {re:classloading}
	at net.minecraftforge.common.capabilities.CapabilityProvider.doGatherCapabilities(CapabilityProvider.java:73) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2378%2385!/:?] {re:classloading}
	at net.minecraftforge.common.capabilities.CapabilityProvider.gatherCapabilities(CapabilityProvider.java:68) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2378%2385!/:?] {re:classloading}
	at net.minecraftforge.common.capabilities.CapabilityProvider.gatherCapabilities(CapabilityProvider.java:52) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2378%2385!/:?] {re:classloading}
	at net.minecraft.world.entity.Entity.<init>(Entity.java:257) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.world.entity.LivingEntity.<init>(LivingEntity.java:234) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading}
	at net.minecraft.world.entity.player.Player.<init>(Player.java:172) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.level.ServerPlayer.<init>(ServerPlayer.java:238) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.players.PlayerList.getPlayerForLogin(PlayerList.java:412) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading}
	at net.minecraft.server.network.ServerLoginPacketListenerImpl.handleAcceptedLogin(ServerLoginPacketListenerImpl.java:124) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.network.ServerLoginPacketListenerImpl.tick(ServerLoginPacketListenerImpl.java:70) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.network.Connection.tick(Connection.java:267) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading}
	at net.minecraft.server.network.ServerConnectionListener.tick(ServerConnectionListener.java:160) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading}
	at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:947) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:873) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.client.server.IntegratedServer.tickServer(IntegratedServer.java:90) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:704) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:262) ~[forge-1.18.2-40.1.68_mapped_parchment_2022.07.17-1.18.2-recomp.jar%2379!/:?] {re:classloading,pl:accesstransformer:B}
	at java.lang.Thread.run(Thread.java:833) [?:?] {}
[10:27:23] [Server thread/INFO] [minecraft/ServerLoginPacketListenerImpl]: com.mojang.authlib.GameProfile@5e18a6a7[id=380df991-f603-344c-a090-369bad2a924a,name=Dev,properties={},legacy=false] (local:E:d56832b6) lost connection: Invalid player data
[10:27:23] [Server thread/WARN] [minecraft/Connection]: handleDisconnection() called twice

@SubscribeEvent
    public static void onAttachCapabilities(AttachCapabilitiesEvent<Entity> event){
        if(event.getObject() instanceof Player){
            if(!event.getObject().getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY).isPresent()){
                event.addCapability(new ResourceLocation(BackpackMod.MODID, "extra_storage"), new ExtraStorageInventory(9));
            }
        }
    }

Squander · August 9, 2022

Okay, after opening the menu, the items in the slots are the same as in the hotbar.

Squander · August 9, 2022

public class ExtraStorageInventory extends ItemStackHandler implements ICapabilityProvider {
    private final LazyOptional<IItemHandler> optional = LazyOptional.of(() -> this);

    public ExtraStorageInventory(int size){
        this.setSize(size);
    }

    @NotNull
    @Override
    public <T> LazyOptional<T> getCapability(@NotNull Capability<T> cap, @Nullable Direction side) {
        return cap == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY ? optional.cast() : LazyOptional.empty();
    }
}

Squander · August 9, 2022

I did a new capability but still have items from the hotbar.

public static final Capability<IItemHandler> EXTRA_STORAGE = CapabilityManager.get(new CapabilityToken<>(){});
    private final LazyOptional<IItemHandler> optional = LazyOptional.of(() -> this);

    public ExtraStorageInventory(int size){
        this.setSize(size);
    }

    @NotNull
    @Override
    public <T> LazyOptional<T> getCapability(@NotNull Capability<T> cap, @Nullable Direction side) {
        return cap == EXTRA_STORAGE ? optional.cast() : LazyOptional.empty();
    }

player.getCapability(ExtraStorageInventory.EXTRA_STORAGE).ifPresent(handler -> {
                    NetworkHooks.openGui((ServerPlayer) player, new SimpleMenuProvider((id, inv, plr) ->
                            new ExtraStorageMenu(id, inv, handler), new TextComponent("EXTRA STORAGE")), buffer -> buffer.writeVarInt(9));
                });

Luis_ST · August 9, 2022

Please show your ExtraStorageMenu class.

Squander · August 9, 2022

public ExtraStorageMenu(int pContainerId, Inventory inventory, FriendlyByteBuf buffer) {
        this(pContainerId, inventory, new ItemStackHandler(buffer.readVarInt()));
    }

    public ExtraStorageMenu(int pContainerId, Inventory inventory, IItemHandler handler) {
        super(MenuTypeInit.EXTRA_STORAGE.get(), pContainerId);

        for(int i = 0; i < 9; ++i) {
            this.addSlot(new SlotItemHandler(handler, i, 1 + i * 18, 1));
        }

        this.addPlayerInventory(inventory);
        this.addPlayerHotbar(inventory);
    }

    private void addPlayerInventory(Inventory inventory){
        for(int i = 0; i < 3; ++i) {
            for(int j = 0; j < 9; ++j) {
                this.addSlot(new Slot(inventory, j + i * 9 + 9, 8 + j * 18, 84 + i * 18));
            }
        }
    }

    private void addPlayerHotbar(Inventory inventory){
        for(int k = 0; k < 9; ++k) {
            this.addSlot(new Slot(inventory, k, 8 + k * 18, 142));
        }
    }

Luis_ST · August 9, 2022

You should get the IItemHandler on server and client from the Player whihc you can get from the given Inventory.

22 minutes ago, Squander said:

I did a new capability but still have items from the hotbar.

You have in the Slots of your IItemHandler the Items from the Hotbar right?

Please post a git repo of your Mod.

Squander · August 9, 2022

Can't finish GitHub sharing process
           Successfully created project 'Backpack1.18.2' on GitHub, but initial commit failed:
           gpg: skipped "Squander12 <[email protected]>": No secret key
           gpg: signing failed: No secret key
           gpg failed to sign the data
           failed to write commit object

I get this error all the time.

Luis_ST · August 9, 2022

Did you try to push the commit within the git feature of your IDE or did you use a Git Client (second is recommend).

Squander · August 9, 2022

I think it's the first

Luis_ST · August 9, 2022

Use a git client, then you shouldn't have any problems. The recommended git client is GitHub Desktop.

I assume that your problem is your IDE has not the permission to commit to your Git repo.

Squander · August 9, 2022

https://github.com/Squander12/Backpack_1.18.2

Luis_ST · August 9, 2022

Your git repo is missing the gradle folder is existential.

Please do not use the files upload use a git client as I have already told you.

Edited August 9, 2022 by Luis_ST

Squander · August 9, 2022

Okay, I don't have the strength to bother with this anymore. Nothing works. Screw it.

Luis_ST · August 9, 2022

Giving up is never the solution of a problem but this is your decision...

Squander · August 9, 2022

error: cannot spawn gpg: No such file or directory error: gpg failed to sign the data fatal: failed to write commit object

Luis_ST · August 9, 2022

Edit: ignore this i'll take a look at that and come back if i found a solution

Where did you get this issue?

Edited August 9, 2022 by Luis_ST

Squander · August 9, 2022

Github Desktop

Luis_ST · August 9, 2022

As far as i can find out this has something to do with commit signing.
You can disable this via the following command or your edit the config file of your git repo:
command:

git config commit.gpgsign false

config file (git repo/.git/config), Note the .git folder is hidden by default.

[commit]
  gpgsign = false

Source: https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits

Squander · August 9, 2022

okay i run github desktop then file tab then add local repository i gave the path of my mod, all files are like loaded but i don't really know what to do now.

Squander · August 9, 2022

My config in my mod project

[core]
   repositoryformatversion = 0
   filemode = false
   bare = false
   logallrefupdates = true
   symlinks = false
   ignorecase = true
[remote "origin"]
   url = [email protected]:/Squander12/Backpack1.18.2.git
   fetch = +refs/heads/*:refs/remotes/origin/*
[remote "github"]
   url = [email protected]:/Squander12/Backpack_1.18.2.git
   fetch = +refs/heads/*:refs/remotes/github/*
[lfs]
   repositoryformatversion = 0
[remote "githubh"]
   url = [email protected]:/Squander12/Backpack_1.18.2.git
   fetch = +refs/heads/*:refs/remotes/githubh/*
[remote "githubasd"]
   url = [email protected]:/Squander12/Backpack1.18.2123.git
   fetch = +refs/heads/*:refs/remotes/githubasd/*
[remote "originn"]
   url = [email protected]:/Squander12/Backpack-1.18.2.git
   fetch = +refs/heads/*:refs/remotes/originn/*
[remote "githubheunyrty"]
   url = [email protected]:/Squander12/aaaa.git
   fetch = +refs/heads/*:refs/remotes/githubheunyrty/*
[commit]
   gpgsign = false

Luis_ST · August 9, 2022

28 minutes ago, Squander said:

okay i run github desktop then file tab then add local repository i gave the path of my mod, all files are like loaded but i don't really know what to do now.

You need to create a public repo not a local, if you done this you need to publish the repo (Note make sure you uncheck "keep this repo private").
The publish it and post the like here.

Squander · August 9, 2022

https://github.com/Squander12/Backpack-1.18.2

I think it should work.

Luis_ST · August 9, 2022

Works, i'll debug this and come back with hopefully a solution

Luis_ST · August 9, 2022

I'm not sure what's the problem everything works how i think it should.

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[1.18.2] Error when attaching capabilities

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