64 lines
2.0 KiB
Java
64 lines
2.0 KiB
Java
/*
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* This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
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* Copyright (C) 2016-2024 ViaVersion and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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package com.viaversion.viaversion.api.minecraft;
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import com.google.common.base.Preconditions;
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final class HolderImpl<T> implements Holder<T> {
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private final T value;
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private final int id;
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HolderImpl(final int id) {
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Preconditions.checkArgument(id >= 0, "id cannot be negative");
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this.value = null;
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this.id = id;
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}
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HolderImpl(final T value) {
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this.value = value;
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this.id = -1;
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}
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@Override
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public boolean isDirect() {
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return id == -1;
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}
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@Override
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public boolean hasId() {
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return id != -1;
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}
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@Override
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public T value() {
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Preconditions.checkArgument(isDirect(), "Holder is not direct");
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return value;
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}
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@Override
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public int id() {
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return id;
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}
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}
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