145 lines
4.7 KiB
Java
145 lines
4.7 KiB
Java
/*
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* This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
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* Copyright (C) 2016-2021 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.metadata;
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import com.google.common.base.Preconditions;
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import org.checkerframework.checker.nullness.qual.Nullable;
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import java.util.Objects;
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public final class Metadata {
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private int id;
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private MetaType metaType;
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private Object value;
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/**
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* Creates a new metadata instance.
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*
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* @param id metadata index
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* @param metaType metadata type
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* @param value value if present
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* @throws IllegalArgumentException if the value and metaType are incompatible
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*/
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public Metadata(int id, MetaType metaType, @Nullable Object value) {
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this.id = id;
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this.metaType = metaType;
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this.value = checkValue(metaType, value);
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}
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public int id() {
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return id;
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}
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public void setId(int id) {
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this.id = id;
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}
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public MetaType metaType() {
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return metaType;
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}
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/**
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* Sets the metadata type if compatible with the current value.
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*
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* @param metaType metadata type
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* @throws IllegalArgumentException if the metadata type and current value are incompatible
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* @see #setTypeAndValue(MetaType, Object)
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*/
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public void setMetaType(MetaType metaType) {
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checkValue(metaType, this.value);
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this.metaType = metaType;
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}
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public @Nullable <T> T value() {
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return (T) value;
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}
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public @Nullable Object getValue() {
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return value;
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}
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/**
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* Sets the metadata value if compatible with the current meta type.
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*
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* @param value value
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* @throws IllegalArgumentException if the value and current metaType are incompatible
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* @see #setTypeAndValue(MetaType, Object)
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*/
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public void setValue(@Nullable Object value) {
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this.value = checkValue(this.metaType, value);
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}
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/**
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* Sets metadata type and value.
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*
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* @param metaType metadata type
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* @param value value
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* @throws IllegalArgumentException if the value and metaType are incompatible
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*/
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public void setTypeAndValue(MetaType metaType, @Nullable Object value) {
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this.value = checkValue(metaType, value);
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this.metaType = metaType;
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}
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private Object checkValue(MetaType metaType, @Nullable Object value) {
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Preconditions.checkNotNull(metaType);
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if (value != null && !metaType.type().getOutputClass().isAssignableFrom(value.getClass())) {
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throw new IllegalArgumentException("Metadata value and metaType are incompatible. Type=" + metaType
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+ ", value=" + (value != null ? value + " (" + value.getClass().getSimpleName() + ")" : "null"));
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}
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return value;
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}
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@Deprecated
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public void setMetaTypeUnsafe(MetaType type) {
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this.metaType = type;
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}
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@Override
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public boolean equals(final Object o) {
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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Metadata metadata = (Metadata) o;
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if (id != metadata.id) return false;
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if (metaType != metadata.metaType) return false;
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return Objects.equals(value, metadata.value);
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}
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@Override
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public int hashCode() {
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int result = id;
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result = 31 * result + metaType.hashCode();
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result = 31 * result + (value != null ? value.hashCode() : 0);
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return result;
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}
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@Override
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public String toString() {
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return "Metadata{" +
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"id=" + id +
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", metaType=" + metaType +
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", value=" + value +
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'}';
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}
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}
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