minecraft-src/net/minecraft/world/level/levelgen/structure/PoolElementStructurePiece.java

package net.minecraft.world.level.levelgen.structure;

import com.google.common.collect.Lists;
import com.mojang.serialization.Dynamic;
import com.mojang.serialization.DynamicOps;
import java.util.List;
import java.util.Locale;
import net.minecraft.core.BlockPos;
import net.minecraft.nbt.CompoundTag;
import net.minecraft.nbt.ListTag;
import net.minecraft.nbt.NbtOps;
import net.minecraft.nbt.Tag;
import net.minecraft.util.RandomSource;
import net.minecraft.world.level.ChunkPos;
import net.minecraft.world.level.StructureManager;
import net.minecraft.world.level.WorldGenLevel;
import net.minecraft.world.level.block.Rotation;
import net.minecraft.world.level.chunk.ChunkGenerator;
import net.minecraft.world.level.levelgen.structure.pieces.StructurePieceSerializationContext;
import net.minecraft.world.level.levelgen.structure.pieces.StructurePieceType;
import net.minecraft.world.level.levelgen.structure.pools.JigsawJunction;
import net.minecraft.world.level.levelgen.structure.pools.StructurePoolElement;
import net.minecraft.world.level.levelgen.structure.structures.JigsawStructure;
import net.minecraft.world.level.levelgen.structure.templatesystem.LiquidSettings;
import net.minecraft.world.level.levelgen.structure.templatesystem.StructureTemplateManager;

public class PoolElementStructurePiece extends StructurePiece {
	protected final StructurePoolElement element;
	protected BlockPos position;
	private final int groundLevelDelta;
	protected final Rotation rotation;
	private final List<JigsawJunction> junctions = Lists.<JigsawJunction>newArrayList();
	private final StructureTemplateManager structureTemplateManager;
	private final LiquidSettings liquidSettings;

	public PoolElementStructurePiece(
		StructureTemplateManager structureTemplateManager,
		StructurePoolElement element,
		BlockPos position,
		int groundLevelDelta,
		Rotation rotation,
		BoundingBox boundingBox,
		LiquidSettings liquidSettings
	) {
		super(StructurePieceType.JIGSAW, 0, boundingBox);
		this.structureTemplateManager = structureTemplateManager;
		this.element = element;
		this.position = position;
		this.groundLevelDelta = groundLevelDelta;
		this.rotation = rotation;
		this.liquidSettings = liquidSettings;
	}

	public PoolElementStructurePiece(StructurePieceSerializationContext context, CompoundTag tag) {
		super(StructurePieceType.JIGSAW, tag);
		this.structureTemplateManager = context.structureTemplateManager();
		this.position = new BlockPos(tag.getIntOr("PosX", 0), tag.getIntOr("PosY", 0), tag.getIntOr("PosZ", 0));
		this.groundLevelDelta = tag.getIntOr("ground_level_delta", 0);
		DynamicOps<Tag> dynamicOps = context.registryAccess().createSerializationContext(NbtOps.INSTANCE);
		this.element = (StructurePoolElement)tag.read("pool_element", StructurePoolElement.CODEC, dynamicOps)
			.orElseThrow(() -> new IllegalStateException("Invalid pool element found"));
		this.rotation = (Rotation)tag.read("rotation", Rotation.LEGACY_CODEC).orElseThrow();
		this.boundingBox = this.element.getBoundingBox(this.structureTemplateManager, this.position, this.rotation);
		ListTag listTag = tag.getListOrEmpty("junctions");
		this.junctions.clear();
		listTag.forEach(tagx -> this.junctions.add(JigsawJunction.deserialize(new Dynamic<>(dynamicOps, tagx))));
		this.liquidSettings = (LiquidSettings)tag.read("liquid_settings", LiquidSettings.CODEC).orElse(JigsawStructure.DEFAULT_LIQUID_SETTINGS);
	}

	@Override
	protected void addAdditionalSaveData(StructurePieceSerializationContext context, CompoundTag tag) {
		tag.putInt("PosX", this.position.getX());
		tag.putInt("PosY", this.position.getY());
		tag.putInt("PosZ", this.position.getZ());
		tag.putInt("ground_level_delta", this.groundLevelDelta);
		DynamicOps<Tag> dynamicOps = context.registryAccess().createSerializationContext(NbtOps.INSTANCE);
		tag.store("pool_element", StructurePoolElement.CODEC, dynamicOps, this.element);
		tag.store("rotation", Rotation.LEGACY_CODEC, this.rotation);
		ListTag listTag = new ListTag();

		for (JigsawJunction jigsawJunction : this.junctions) {
			listTag.add(jigsawJunction.serialize(dynamicOps).getValue());
		}

		tag.put("junctions", listTag);
		if (this.liquidSettings != JigsawStructure.DEFAULT_LIQUID_SETTINGS) {
			tag.store("liquid_settings", LiquidSettings.CODEC, dynamicOps, this.liquidSettings);
		}
	}

	@Override
	public void postProcess(
		WorldGenLevel level, StructureManager structureManager, ChunkGenerator generator, RandomSource random, BoundingBox box, ChunkPos chunkPos, BlockPos pos
	) {
		this.place(level, structureManager, generator, random, box, pos, false);
	}

	public void place(
		WorldGenLevel level, StructureManager structureManager, ChunkGenerator generator, RandomSource random, BoundingBox box, BlockPos pos, boolean keepJigsaws
	) {
		this.element
			.place(this.structureTemplateManager, level, structureManager, generator, this.position, pos, this.rotation, box, random, this.liquidSettings, keepJigsaws);
	}

	@Override
	public void move(int x, int y, int z) {
		super.move(x, y, z);
		this.position = this.position.offset(x, y, z);
	}

	@Override
	public Rotation getRotation() {
		return this.rotation;
	}

	public String toString() {
		return String.format(Locale.ROOT, "<%s | %s | %s | %s>", this.getClass().getSimpleName(), this.position, this.rotation, this.element);
	}

	public StructurePoolElement getElement() {
		return this.element;
	}

	public BlockPos getPosition() {
		return this.position;
	}

	public int getGroundLevelDelta() {
		return this.groundLevelDelta;
	}

	public void addJunction(JigsawJunction junction) {
		this.junctions.add(junction);
	}

	public List<JigsawJunction> getJunctions() {
		return this.junctions;
	}
}