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Accessing Capabilities on Players


hammy3502
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Hello!

I'm trying to create a capability that reads a player's CompoundTag, and extracts some custom mod data from it to assemble an object, along with being given one of those mod objects and writing it to a Player's nbt. I've hopefully created the capability correctly, but I'm not sure how to go about having a `Player` read/write this data during a world save, and how I can go about retrieving the data from a given `Player` object on world join (I know I'd need to subscribe to the event, but I have no idea what I'd do from there). Additionally, this code results in "Invalid player data" whenever I join a world, and I don't know what's in here causes that (EDIT: Figured out this was due to my own bad serialization code. Does this mean that the NBT is automatically loaded on world join and saved on world leave?). My full repository can be found here: https://github.com/hammy3502/elementalism , and the relevant code snippets are below:

 

Object with Custom Mod Data (PlayerProgressionData.java):

public class PlayerProgressionData implements INBTSerializable<CompoundTag> {

    public static final String outerTag = "elementalism_data";

    public ProgressionInfo.ElementType type;
    public ProgressionInfo.ElementType type2;
    public List<ProgressionInfo> powersUnlocked;

    public PlayerProgressionData() {
        this.type = ProgressionInfo.ElementType.NONE;
        this.type2 = ProgressionInfo.ElementType.NONE;
        this.powersUnlocked = new ArrayList<>();
    }

    @Override
    public CompoundTag serializeNBT() {
        CompoundTag toRet = new CompoundTag();
        CompoundTag data = new CompoundTag();

        StringBuilder powersList = new StringBuilder();
        for (int i = 0; i < powersUnlocked.size(); i++) {
            powersList.append(powersUnlocked.get(i).id);
            if (i != powersUnlocked.size() - 1) {
                powersList.append(",");
            }
        }
        data.putString("unlockedPowers", powersList.toString());

        data.putString("element1", this.type.id);
        data.putString("element2", this.type2.id);

        toRet.put(outerTag, data);
        return toRet;
    }

    @Override
    public void deserializeNBT(CompoundTag nbt) {
        if (!nbt.contains(outerTag)) return;
        this.powersUnlocked.clear();
        CompoundTag data = nbt.getCompound(outerTag);
        this.type = ProgressionInfo.ElementType.getElementById(data.getString("element1"));
        this.type2 = ProgressionInfo.ElementType.getElementById(data.getString("element2"));

        String[] powerIds = data.getString("unlockedPowers").split(",");
        for (String id : powerIds) {
            ProgressionInfo info = Objects.requireNonNull(ProgressionInfoInit.ALL_PROGRESSION_INFOS.get(id));
            this.powersUnlocked.add(info);
        }


    }
}


Capability Registration (Elementalism.java):

public void registerCapabilities(RegisterCapabilitiesEvent event) {
	event.register(PlayerProgressionData.class);
}

 

Capability Attaching (CommonSubscriber.java):

@SubscribeEvent
    public void attachCapabilities(AttachCapabilitiesEvent<Entity> event) {
        if (!(event.getObject() instanceof Player)) return;

        PlayerProgressionData progressionData = new PlayerProgressionData();
        LazyOptional<PlayerProgressionData> optionalProgressionData = LazyOptional.of(() -> progressionData);
        ICapabilityProvider provider = new ICapabilitySerializable<CompoundTag>() {

            @Override
            public CompoundTag serializeNBT() {
                return progressionData.serializeNBT();
            }

            @Override
            public void deserializeNBT(CompoundTag nbt) {
                progressionData.deserializeNBT(nbt);
            }

            @Nonnull
            @Override
            public <T> LazyOptional<T> getCapability(@Nonnull Capability<T> cap, @Nullable Direction side) {
                if (cap == DATA_STORAGE_CAPABILITY) {
                    return optionalProgressionData.cast();
                }
                return LazyOptional.empty();
            }
        };

        event.addCapability(new ResourceLocation(Elementalism.MOD_ID, "data_storage"), provider);
        event.addListener(optionalProgressionData::invalidate);

    }

 

Thank you so much for any help!

Edited by hammy3502
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1.12-1.3.3.55            | Mantle-1.12-1.3.3.55.jar                        | None                                     |     | LCHIJA | mekanismgenerators                | 1.12.2-9.8.3.390         | MekanismGenerators-1.12.2-9.8.3.390.jar         | None                                     |     | LCHIJA | numina                            | 1.12.2-1.0.38            | Numina-1.12.2-1.0.38.jar                        | None                                     |     | LCHIJA | powersuits                        | 1.12.2-1.0.46            | ModularPowersuits-1.12.2-1.0.46.jar             | None                                     |     | LCHIJA | mousetweaks                       | 2.10                     | MouseTweaks-2.10-mc1.12.2.jar                   | None                                     |     | LCHIJA | mysticalagriculture               | 1.7.5                    | MysticalAgriculture-1.12.2-1.7.5.jar            | None                                     |     | LCHIJA | omlib                             | 3.1.4-249                | omlib-1.12.2-3.1.4-249.jar                      | None                                     |     | LCHIJA | ompd                              | 3.1.0-61                 | ompd-1.12.2-3.1.0-61.jar                        | None                                     |     | LCHIJA | openmods                          | 0.12.2                   | OpenModsLib-1.12.2-0.12.2.jar                   | d2a9a8e8440196e26a268d1f3ddc01b2e9c572a5 |     | LCHIJA | openblocks                        | 1.8.1                    | OpenBlocks-1.12.2-1.8.1.jar                     | d2a9a8e8440196e26a268d1f3ddc01b2e9c572a5 |     | LCHIJA | openmodularturrets                | 3.1.6-362                | openmodularturrets-1.12.2-3.1.6-362.jar         | None                                     |     | LCHIJA | oreexcavation                     | 1.4.143                  | OreExcavation-1.4.143.jar                       | None                                     |     | LCHIJA | harvestcraft                      | 1.12.2zb                 | Pam's HarvestCraft 1.12.2zf.jar                 | None                                     |     | LCHIJA | placebo                           | 1.6.0                    | Placebo-1.12.2-1.6.0.jar                        | None                                     |     | LCHIJA | reborncore                        | 3.18.0                   | RebornCore-1.12.2-3.18.1.514-universal.jar      | 8727a3141c8ec7f173b87aa78b9b9807867c4e6b |     | LCHIJA | thermaldynamics                   | 2.5.5                    | ThermalDynamics-1.12.2-2.5.5.21-universal.jar   | 8a6abf2cb9e141b866580d369ba6548732eff25f |     | LCHIJA | toastcontrol                      | 1.8.1                    | Toast Control-1.12.2-1.8.1.jar                  | None                                     |     | LCHIJA | wawla                             | 2.6.274                  | Wawla-1.12.2-2.6.274.jar                        | d476d1b22b218a10d845928d1665d45fce301b27 |     | LCHIJA | jurassicraft                      | 2.1.23                   | JurassiCraft-1.12.2-2.1.23.jar                  | None                                     |     | LCHIJA | teslacorelib_registries           | 1.0.16                   | tesla-core-lib-1.12.2-1.0.16.jar                | None                                     |     Loaded coremods (and transformers):  llibrary (llibrary-core-1.0.11-1.12.2.jar)   net.ilexiconn.llibrary.server.core.plugin.LLibraryTransformer   net.ilexiconn.llibrary.server.core.patcher.LLibraryRuntimePatcher Inventory Tweaks Coremod (InventoryTweaks-1.63.jar)   invtweaks.forge.asm.ContainerTransformer EnderCorePlugin (EnderCore-1.12.2-0.5.76-core.jar)   com.enderio.core.common.transform.EnderCoreTransformer   com.enderio.core.common.transform.SimpleMixinPatcher AppleCore (AppleCore-mc1.12.2-3.2.0.jar)   squeek.applecore.asm.TransformerModuleHandler CTMCorePlugin (CTM-MC1.12.2-1.0.1.30.jar)   team.chisel.ctm.client.asm.CTMTransformer ForgelinPlugin (Forgelin-1.8.4.jar)    MekanismCoremod (Mekanism-1.12.2-9.8.3.390.jar)   mekanism.coremod.KeybindingMigrationHelper OpenModsCorePlugin (OpenModsLib-1.12.2-0.12.2.jar)   openmods.core.OpenModsClassTransformer MalisisCorePlugin (malisiscore-1.12.2-6.5.1.jar)        GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.     OpenModsLib class transformers: [llama_null_fix:FINISHED],[horse_base_null_fix:FINISHED],[pre_world_render_hook:FINISHED],[player_render_hook:FINISHED],[horse_null_fix:FINISHED]     AE2 Version: stable rv6-stable-7 for Forge 14.23.5.2768     Ender IO: No known problems detected.     Authlib is : /C:/Users/User/Twitch/Minecraft/Install/libraries/com/mojang/authlib/1.5.25/authlib-1.5.25.jar     !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!     !!!You are looking at the diagnostics information, not at the crash.       !!!     !!!Scroll up until you see the line with '---- Minecraft Crash Report ----'!!!     !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!     RebornCore:          Plugin Engine: 0         RebornCore Version: 3.18.0         Runtime Debofucsation 1         RenderEngine: 0     AE2 Integration: IC2:OFF, RC:OFF, MFR:OFF, Waila:ON, InvTweaks:ON, JEI:ON, Mekanism:ON, OpenComputers:OFF, THE_ONE_PROBE:OFF, TESLA:OFF, CRAFTTWEAKER:ON     Profiler Position: N/A (disabled)     Player Count: 1 / 8; [EntityPlayerMP['AventureiroMax'/313, l='jurassic craft', x=231.44, y=90.00, z=117.46]]     Type: Integrated Server (map_client.txt)     Is Modded: Definitely; Client brand changed to 'fml,forge'    
    • I realized the error but I'm not sure how I'm supposed to solve it. Some vanilla feature in the biome I'm using in my dimensions uses an absolute upper bound but relative lower bound. So when I made the min built height of my dimension greater, the lower bound increased so much that it became higher than the upper bound. I'm not sure how to fix this other than change my dimension min height, but I was trying to center my dimension at about surface level so that the correct features were carved. 
    • The Forge team can't support every version of Minecraft in-perpetuity. No software company does that with their software. Forge has decided that they will support the most recent major version (1.17) and a single LTS version (1.15) 1.12 is 4 years old at this point.
    • I need help, I can't enter my server, from one day to another I couldn't connect anymore, that LOG is what I get when I log in, I already tried with another launcher and with another account but it marks the same error, my friends They can still play on the server, and I being the owner of the server I can't enter haha please help   [02:34:32] [Netty Epoll Server IO #2/ERROR] [ne.mi.fm.ne.NetworkRegistry/NETREGISTRY]: Channels [carryon:carryonpackets] rejected their client side version number[02:34:32] [Netty Epoll Server IO #2/ERROR] [ne.mi.fm.ne.FMLHandshakeHandler/FMLHANDSHAKE]: Terminating connection with client, mismatched mod list[02:34:32] [Server thread/INFO] [minecraft/ServerLoginNetHandler]: com.mojang.authlib.GameProfile@******[id=<null>,name=LeonardoRR,properties={},legacy=false] lost connection: Connection closed - mismatched mod channel list
    • I'm looking into UniformHeight because that seems to be the place where the message is logged. I'm not sure how the min > max thought because just finding usages of UniformHeight.of() shows that all the heights created seem to be constant. I'm not sure what's going on. 
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