Tomlabete

I think this can help me, but after a deep look in all the related threads, I can't figure out how exactly can I attach my capability data to the stack NBT. When I try this on the server, I am disconnected with an error on the server console as soon as I take a key/lock in my hand : @Override public NBTTagCompound getNBTShareTag(ItemStack stack) { stack.getTagCompound().setInteger("keyCode", stack.getCapability(KeyCode.Provider.KEY_CODE_CAP, null).get()); return stack.getTagCompound(); } The error :

Well, I did it all and this is not working. Packet is sent and received, the code is transmitted from server to client, but I can't find a way to update the ItemStack. It seems that it's overwritten by the server without taking the capability into account. The code of the key/lock is always 0 (default) on the client. On the server it can be anything, but as soon as I open Creative inventory, all codes are reset... I tried to change the quantity and the item type of the stack but nothing is happening, I guess the client hasn't any right to tell which ItemStack is in the inventory of the player. Any idea for me ? (I found this thread on a same topic, unsolved yet...)

Thank you very much, that's definitly going to help me

That's true, I don't use initCapabilities at all, I'm going to try this, but will data be transmitted from the server to the client and then back to the server with only this ? Here is the gitHub folder where you can find the capability (KeyCode), its interface (IKeyCode) and the Item class (McfrCodedItem). https://github.com/Mc-Fr/Forge/tree/master/Forge1.10/src/main/java/net/mcfr/mecanisms/keys Here is the event handler that I need to delete and replace by usage of initCapabilities (doing this tomorrow). https://github.com/Mc-Fr/Forge/blob/master/Forge1.10/src/main/java/net/mcfr/event/ItemEventsHandler.java

Does anyone has an idea that might help me ?

Ok, np. Here is my Item class, keys and locks are instances of it. public class McfrCodedItem extends McfrItem { public McfrCodedItem(String name, CreativeTabs tab) { super(name, 1, tab); setHasSubtypes(true); } @Override public String getUnlocalizedName(ItemStack stack) { return getUnlocalizedName() + "." + (stack.getMetadata() == 0 ? "blank" : "coded"); } @Override @SideOnly(Side.CLIENT) public void getSubItems(Item itemIn, CreativeTabs tab, List<ItemStack> subItems) { subItems.add(new ItemStack(itemIn, 1, 0)); // metadata = 0 --> Blank key/lock, unusable subItems.add(new ItemStack(itemIn, 1, 1)); // metadata = 1 --> Coded key/lock, usable } public void setCode(EntityPlayer player, int code) { ItemStack stack = new ItemStack(player.getHeldItemMainhand().getItem(), 1, 1); // replace item in hand with coded item if (stack.hasCapability(KeyCode.Provider.KEY_CODE_CAP, null)) { IKeyCode keyCode = stack.getCapability(KeyCode.Provider.KEY_CODE_CAP, null); keyCode.set(code); } player.setHeldItem(EnumHand.MAIN_HAND, stack); } @SideOnly(Side.SERVER) public Optional<Integer> getCode(EntityPlayer player) { ItemStack stack = player.getHeldItemMainhand(); if (stack.getMetadata() == 1 && stack.hasCapability(KeyCode.Provider.KEY_CODE_CAP, null)) // Check if item is coded return Optional.of(stack.getCapability(KeyCode.Provider.KEY_CODE_CAP, null).get()); //Optional.of(code) if coded else return Optional.empty(); //Optional.empty() if blank } } The setCode(player, code) and getCode(player) methods are called from my Sponge plugin. I would like to sync client-item-capabilities with server-item-capabilities whenever setCode is called. Here is my capability class. Provider and Storage are static classes inside it. public class KeyCode implements IKeyCode { private int code = 0; @Override public int get() { return this.code; } @Override public void set(int code) { this.code = code; } public static class Storage implements IStorage<IKeyCode> { @Override public NBTBase writeNBT(Capability<IKeyCode> capability, IKeyCode instance, EnumFacing side) { NBTTagCompound tag = new NBTTagCompound(); tag.setInteger("keyCode", instance.get()); return tag; } @Override public void readNBT(Capability<IKeyCode> capability, IKeyCode instance, EnumFacing side, NBTBase nbt) { NBTTagCompound tag = (NBTTagCompound) nbt; instance.set(tag.getInteger("keyCode")); } } public static class Provider implements ICapabilitySerializable<NBTBase> { @CapabilityInject(IKeyCode.class) public static final Capability<IKeyCode> KEY_CODE_CAP = null; private IKeyCode instance = KEY_CODE_CAP.getDefaultInstance(); @Override public boolean hasCapability(Capability<?> capability, EnumFacing facing) { return capability == KEY_CODE_CAP; } @Override public <T> T getCapability(Capability<T> capability, EnumFacing facing) { return capability == KEY_CODE_CAP ? KEY_CODE_CAP.<T>cast(this.instance) : null; } @Override public NBTBase serializeNBT() { return KEY_CODE_CAP.getStorage().writeNBT(KEY_CODE_CAP, this.instance, null); } @Override public void deserializeNBT(NBTBase nbt) { KEY_CODE_CAP.getStorage().readNBT(KEY_CODE_CAP, this.instance, null, nbt); } } } Handling of the attachCapabilities event : public class ItemEventsHandler { public static final ResourceLocation KEY_CODE_CAP = new ResourceLocation(Constants.MOD_ID, "keyCode"); @SubscribeEvent public void onAttachEntityCapabilities(AttachCapabilitiesEvent<Item> event) { if (event.getObject() instanceof McfrCodedItem) { event.addCapability(KEY_CODE_CAP, new KeyCode.Provider()); } } } And finally, the line in my Init method, in main class : CapabilityManager.INSTANCE.register(IKeyCode.class, new KeyCode.Storage(), KeyCode.class); Hope this helps

Hello ! I'm on a keys&locks mod that works pairwise with a sponge plugin (not relevant here, though, just remember that it's mainly serversided mecanics). My items have a code-capability that stores a key-code in them that is checked whenever a player tries to open a closed chest/door/trapdoor. Everything works perfectly well with survival inventories : the plugin sends codes to the server-side items, they keep it and re-send it when asked by the plugin. But the problem occurs with Creative inventory : as soon as a Creative inventory is opened, all keys and locks contained in it are reset to a code "0". It happens because the client-side capability is never updated and stays at zero. My question is : what is the best way for me to send the code from the server to the client when code is configured ? I'm not good at all with packages. I guess it will be about it, so if you guys could give me some tutorial links with a quick explanation of what I should do in my particular case, I would be really grateful Thanks, have a nive day !