Code/net/minecraft/client/renderer/block/model/BlockModel.java

package net.minecraft.client.renderer.block.model;

import com.google.common.annotations.VisibleForTesting;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import java.io.Reader;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.Nullable;
import net.minecraft.client.renderer.texture.TextureAtlas;
import net.minecraft.client.resources.model.UnbakedGeometry;
import net.minecraft.client.resources.model.UnbakedModel;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.util.GsonHelper;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public record BlockModel(
    @Nullable UnbakedGeometry geometry,
    @Nullable UnbakedModel.GuiLight guiLight,
    @Nullable Boolean ambientOcclusion,
    @Nullable ItemTransforms transforms,
    TextureSlots.Data textureSlots,
    @Nullable ResourceLocation parent
) implements UnbakedModel {
    @VisibleForTesting
    static final Gson GSON = new GsonBuilder()
        .registerTypeAdapter(BlockModel.class, new BlockModel.Deserializer())
        .registerTypeAdapter(BlockElement.class, new BlockElement.Deserializer())
        .registerTypeAdapter(BlockElementFace.class, new BlockElementFace.Deserializer())
        .registerTypeAdapter(ItemTransform.class, new ItemTransform.Deserializer())
        .registerTypeAdapter(ItemTransforms.class, new ItemTransforms.Deserializer())
        .create();

    public static BlockModel fromStream(Reader p_111462_) {
        return GsonHelper.fromJson(GSON, p_111462_, BlockModel.class);
    }

    @Nullable
    @Override
    public UnbakedGeometry geometry() {
        return this.geometry;
    }

    @Nullable
    @Override
    public UnbakedModel.GuiLight guiLight() {
        return this.guiLight;
    }

    @Nullable
    @Override
    public Boolean ambientOcclusion() {
        return this.ambientOcclusion;
    }

    @Nullable
    @Override
    public ItemTransforms transforms() {
        return this.transforms;
    }

    @Override
    public TextureSlots.Data textureSlots() {
        return this.textureSlots;
    }

    @Nullable
    @Override
    public ResourceLocation parent() {
        return this.parent;
    }

    @OnlyIn(Dist.CLIENT)
    public static class Deserializer implements JsonDeserializer<BlockModel> {
        public BlockModel deserialize(JsonElement p_111498_, Type p_111499_, JsonDeserializationContext p_111500_) throws JsonParseException {
            JsonObject jsonobject = p_111498_.getAsJsonObject();
            UnbakedGeometry unbakedgeometry = this.getElements(p_111500_, jsonobject);
            String s = this.getParentName(jsonobject);
            TextureSlots.Data textureslots$data = this.getTextureMap(jsonobject);
            Boolean obool = this.getAmbientOcclusion(jsonobject);
            ItemTransforms itemtransforms = null;
            if (jsonobject.has("display")) {
                JsonObject jsonobject1 = GsonHelper.getAsJsonObject(jsonobject, "display");
                itemtransforms = p_111500_.deserialize(jsonobject1, ItemTransforms.class);
            }

            UnbakedModel.GuiLight unbakedmodel$guilight = null;
            if (jsonobject.has("gui_light")) {
                unbakedmodel$guilight = UnbakedModel.GuiLight.getByName(GsonHelper.getAsString(jsonobject, "gui_light"));
            }

            ResourceLocation resourcelocation = s.isEmpty() ? null : ResourceLocation.parse(s);
            return new BlockModel(unbakedgeometry, unbakedmodel$guilight, obool, itemtransforms, textureslots$data, resourcelocation);
        }

        private TextureSlots.Data getTextureMap(JsonObject p_111510_) {
            if (p_111510_.has("textures")) {
                JsonObject jsonobject = GsonHelper.getAsJsonObject(p_111510_, "textures");
                return TextureSlots.parseTextureMap(jsonobject, TextureAtlas.LOCATION_BLOCKS);
            } else {
                return TextureSlots.Data.EMPTY;
            }
        }

        private String getParentName(JsonObject p_111512_) {
            return GsonHelper.getAsString(p_111512_, "parent", "");
        }

        @Nullable
        protected Boolean getAmbientOcclusion(JsonObject p_273052_) {
            return p_273052_.has("ambientocclusion") ? GsonHelper.getAsBoolean(p_273052_, "ambientocclusion") : null;
        }

        @Nullable
        protected UnbakedGeometry getElements(JsonDeserializationContext p_111507_, JsonObject p_111508_) {
            if (!p_111508_.has("elements")) {
                return null;
            } else {
                List<BlockElement> list = new ArrayList<>();

                for (JsonElement jsonelement : GsonHelper.getAsJsonArray(p_111508_, "elements")) {
                    list.add(p_111507_.deserialize(jsonelement, BlockElement.class));
                }

                return new SimpleUnbakedGeometry(list);
            }
        }
    }
}