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128 lines
4.0 KiB
Java
128 lines
4.0 KiB
Java
/*
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* WorldEdit, a Minecraft world manipulation toolkit
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* Copyright (C) sk89q <http://www.sk89q.com>
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* Copyright (C) WorldEdit team and contributors
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.sk89q.worldedit.world.storage;
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import com.sk89q.jnbt.CompoundTag;
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import com.sk89q.jnbt.Tag;
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import com.sk89q.worldedit.math.BlockVector2;
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import com.sk89q.worldedit.math.BlockVector3;
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import com.sk89q.worldedit.world.DataException;
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import com.sk89q.worldedit.world.World;
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import com.sk89q.worldedit.world.chunk.AnvilChunk;
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import com.sk89q.worldedit.world.chunk.AnvilChunk13;
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import com.sk89q.worldedit.world.chunk.Chunk;
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import com.sk89q.worldedit.world.chunk.OldChunk;
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import java.io.Closeable;
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import java.io.IOException;
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import java.util.Map;
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/**
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* Represents chunk storage mechanisms.
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*/
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public abstract class ChunkStore implements Closeable {
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/**
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* The DataVersion for Minecraft 1.13
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*/
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public static final int DATA_VERSION_MC_1_13 = 1519;
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/**
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* {@code >>} - to chunk
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* {@code <<} - from chunk
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*/
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public static final int CHUNK_SHIFTS = 4;
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/**
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* Convert a position to a chunk.
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*
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* @param position the position
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* @return chunk coordinates
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*/
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public static BlockVector2 toChunk(BlockVector3 position) {
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return BlockVector2.at(position.getX() >> CHUNK_SHIFTS, position.getZ() >> CHUNK_SHIFTS);
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}
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/**
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* Get the tag for a chunk.
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*
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* @param position the position of the chunk
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* @return tag
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* @throws DataException thrown on data error
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* @throws IOException thrown on I/O error
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*/
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public abstract CompoundTag getChunkTag(BlockVector2 position, World world) throws DataException, IOException;
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/**
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* Get a chunk at a location.
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*
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* @param position the position of the chunk
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* @return a chunk
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* @throws ChunkStoreException thrown if there is an error from the chunk store
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* @throws DataException thrown on data error
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* @throws IOException thrown on I/O error
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*/
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public Chunk getChunk(BlockVector2 position, World world) throws DataException, IOException {
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CompoundTag rootTag = getChunkTag(position, world);
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Map<String, Tag> children = rootTag.getValue();
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CompoundTag tag = null;
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// Find Level tag
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for (Map.Entry<String, Tag> entry : children.entrySet()) {
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if (entry.getKey().equals("Level")) {
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if (entry.getValue() instanceof CompoundTag) {
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tag = (CompoundTag) entry.getValue();
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break;
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} else {
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throw new ChunkStoreException("CompoundTag expected for 'Level'; got " + entry.getValue().getClass().getName());
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}
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}
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}
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if (tag == null) {
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throw new ChunkStoreException("Missing root 'Level' tag");
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}
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int dataVersion = rootTag.getInt("DataVersion");
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if (dataVersion >= DATA_VERSION_MC_1_13) {
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return new AnvilChunk13(tag);
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}
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Map<String, Tag> tags = tag.getValue();
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if (tags.containsKey("Sections")) {
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return new AnvilChunk(world, tag);
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}
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return new OldChunk(world, tag);
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}
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public void close() throws IOException {
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}
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/**
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* Returns whether the chunk store is of this type.
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*
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* @return true if valid
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*/
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public abstract boolean isValid();
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}
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