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78 lines
2.7 KiB
Java
78 lines
2.7 KiB
Java
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/*
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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.internal.block;
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import com.google.common.collect.BiMap;
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import com.google.common.collect.HashBiMap;
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import com.sk89q.worldedit.world.block.BlockState;
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import com.sk89q.worldedit.world.registry.BlockRegistry;
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import javax.annotation.Nullable;
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import java.util.BitSet;
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import java.util.OptionalInt;
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import static com.google.common.base.Preconditions.checkState;
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public final class BlockStateIdAccess {
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private static final BiMap<BlockState, Integer> ASSIGNED_IDS = HashBiMap.create(2 << 13);
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public static OptionalInt getBlockStateId(BlockState holder) {
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Integer value = ASSIGNED_IDS.get(holder);
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return value == null ? OptionalInt.empty() : OptionalInt.of(value);
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}
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public static @Nullable BlockState getBlockStateById(int id) {
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return ASSIGNED_IDS.inverse().get(id);
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}
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/**
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* For platforms that don't have an internal ID system,
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* {@link BlockRegistry#getInternalBlockStateId(BlockState)} will return
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* {@link OptionalInt#empty()}. In those cases, we will use our own ID system,
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* since it's useful for other entries as well.
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* @return an unused ID in WorldEdit's ID tracker
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*/
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private static int provideUnusedWorldEditId() {
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return usedIds.nextClearBit(0);
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}
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private static final BitSet usedIds = new BitSet();
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public static void register(BlockState blockState, OptionalInt id) {
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int i = id.orElseGet(BlockStateIdAccess::provideUnusedWorldEditId);
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BlockState existing = ASSIGNED_IDS.inverse().get(i);
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checkState(existing == null || existing == blockState,
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"BlockState %s is using the same block ID (%s) as BlockState %s",
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blockState, i, existing);
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ASSIGNED_IDS.put(blockState, i);
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usedIds.set(i);
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}
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public static void clear() {
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ASSIGNED_IDS.clear();
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usedIds.clear();
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}
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private BlockStateIdAccess() {
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}
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}
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