MixinAnvilChunkLoader_ChunkIO.java

/*
 * This file is part of Sponge, licensed under the MIT License (MIT).
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package org.spongepowered.server.mixin.chunkio;

import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.world.World;
import net.minecraft.world.chunk.Chunk;
import net.minecraft.world.chunk.storage.AnvilChunkLoader;
import net.minecraft.world.chunk.storage.ExtendedBlockStorage;
import org.spongepowered.asm.mixin.Final;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.Overwrite;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Inject;
import org.spongepowered.asm.mixin.injection.Surrogate;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
import org.spongepowered.asm.mixin.injection.callback.LocalCapture;

import java.io.IOException;

@Mixin(AnvilChunkLoader.class)
public abstract class MixinAnvilChunkLoader_ChunkIO {

    /**
     * @author Minecrell - May 28th, 2016
     * @reason Replaced to throw an exception because everything should go
     *     through the async chunk loader
     */
    @Overwrite
    @Final
    public Chunk loadChunk(World worldIn, int x, int z) throws IOException {
        throw new UnsupportedOperationException("Attempting to load a chunk synchronously");
    }

    @Inject(method = "readChunkFromNBT",
            at = @At(value = "INVOKE", target = "Lnet/minecraft/nbt/NBTTagCompound;getTagList(Ljava/lang/String;I)Lnet/minecraft/nbt/NBTTagList;",
                    ordinal = 1),
            cancellable = true, locals = LocalCapture.CAPTURE_FAILHARD)
    private void asyncReadChunkFromNBT(World worldIn, NBTTagCompound compound, CallbackInfoReturnable<Chunk> cir, int x, int z, Chunk chunk) {
        cir.setReturnValue(chunk);
    }

    @Surrogate
    private void asyncReadChunkFromNBT(World worldIn, NBTTagCompound compound, CallbackInfoReturnable<Chunk> cir,
            int x, int z, Chunk chunk, NBTTagList nbttaglist, int k, ExtendedBlockStorage[] aextendedblockstorage, boolean flag) {
        cir.setReturnValue(chunk);
    }

}