73 lines
3.1 KiB
Java
73 lines
3.1 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.util;
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import com.google.common.base.Preconditions;
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import com.viaversion.viaversion.api.protocol.packet.PacketType;
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import com.viaversion.viaversion.api.protocol.packet.State;
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import com.viaversion.viaversion.api.protocol.packet.provider.PacketTypeMap;
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import java.util.Collections;
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import java.util.EnumMap;
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import java.util.Map;
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import org.checkerframework.checker.nullness.qual.Nullable;
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public final class ProtocolUtil {
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/**
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* Returns a map of packet types by state.
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*
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* @param parent parent packet type class as given by the Protocol generics
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* @param packetTypeClasses packet type enum classes belonging to the parent type
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* @param <P> packet type class
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* @return map of packet types by state
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*/
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@SafeVarargs
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public static <P extends PacketType> Map<State, PacketTypeMap<P>> packetTypeMap(@Nullable Class<P> parent, Class<? extends P>... packetTypeClasses) {
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if (parent == null) {
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return Collections.emptyMap();
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}
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final Map<State, PacketTypeMap<P>> map = new EnumMap<>(State.class);
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for (final Class<? extends P> packetTypeClass : packetTypeClasses) {
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// Get state from first enum type
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final P[] types = packetTypeClass.getEnumConstants();
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Preconditions.checkArgument(types != null, "%s not an enum", packetTypeClass);
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Preconditions.checkArgument(types.length > 0, "Enum %s has no types", packetTypeClass);
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final State state = types[0].state();
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map.put(state, PacketTypeMap.of(packetTypeClass));
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}
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return map;
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}
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/**
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* Returns a hex string of a packet id.
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*
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* @param id packet id
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* @return packet id as a nice hex string
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*/
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public static String toNiceHex(int id) {
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final String hex = Integer.toHexString(id).toUpperCase();
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return (hex.length() == 1 ? "0x0" : "0x") + hex;
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}
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}
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