96 lines
3.6 KiB
Java
96 lines
3.6 KiB
Java
package com.comphenix.protocol.utility;
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import com.comphenix.protocol.injector.BukkitUnwrapper;
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import com.comphenix.protocol.reflect.FuzzyReflection;
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import com.comphenix.protocol.reflect.accessors.Accessors;
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import com.comphenix.protocol.reflect.accessors.FieldAccessor;
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import org.bukkit.entity.Player;
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/**
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* Retrieve the content of well-known fields in Minecraft.
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*
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* @author Kristian
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*/
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public final class MinecraftFields {
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// Cached accessors
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private static volatile FieldAccessor CONNECTION_ACCESSOR;
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private static volatile FieldAccessor NETWORK_ACCESSOR;
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private static volatile FieldAccessor CONNECTION_ENTITY_ACCESSOR;
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private MinecraftFields() {
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// Not constructable
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}
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/**
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* Retrieve the network manager associated with a particular player.
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*
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* @param player - the player.
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* @return The network manager, or NULL if no network manager has been associated yet.
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*/
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public static Object getNetworkManager(Player player) {
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Object nmsPlayer = BukkitUnwrapper.getInstance().unwrapItem(player);
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if (NETWORK_ACCESSOR == null) {
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Class<?> networkClass = MinecraftReflection.getNetworkManagerClass();
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Class<?> connectionClass = MinecraftReflection.getPlayerConnectionClass();
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NETWORK_ACCESSOR = FuzzyReflection.fromClass(connectionClass, true)
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.getDeclaredFields(Object.class)
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.stream()
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.filter(field -> field.getType().equals(networkClass))
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.findFirst()
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.map(Accessors::getFieldAccessor)
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.orElseThrow(() -> new IllegalArgumentException("Unable to find the NetworkManager field in PlayerConnection"));
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}
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// Retrieve the network manager
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final Object playerConnection = getPlayerConnection(nmsPlayer);
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if (playerConnection != null) {
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return NETWORK_ACCESSOR.get(playerConnection);
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}
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return null;
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}
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/**
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* Retrieve the PlayerConnection (or NetServerHandler) associated with a player.
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*
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* @param player - the player.
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* @return The player connection.
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*/
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public static Object getPlayerConnection(Player player) {
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return getPlayerConnection(BukkitUnwrapper.getInstance().unwrapItem(player));
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}
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/**
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* Retrieve the PlayerConnection (or NetServerHandler) associated with a player.
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*
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* @param nmsPlayer - the NMS player.
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* @return The player connection.
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*/
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public static Object getPlayerConnection(Object nmsPlayer) {
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if (CONNECTION_ACCESSOR == null) {
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Class<?> connectionClass = MinecraftReflection.getPlayerConnectionClass();
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CONNECTION_ACCESSOR = Accessors.getFieldAccessor(nmsPlayer.getClass(), connectionClass, true);
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}
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return CONNECTION_ACCESSOR.get(nmsPlayer);
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}
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/**
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* Retrieves the EntityPlayer player field from a PlayerConnection.
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*
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* @param playerConnection The PlayerConnection object from which to retrieve the EntityPlayer field.
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* @return The value of the EntityPlayer field in the PlayerConnection.
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*/
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public static Object getPlayerFromConnection(Object playerConnection) {
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if (CONNECTION_ENTITY_ACCESSOR == null) {
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Class<?> connectionClass = MinecraftReflection.getPlayerConnectionClass();
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Class<?> entityPlayerClass = MinecraftReflection.getEntityPlayerClass();
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CONNECTION_ENTITY_ACCESSOR = Accessors.getFieldAccessor(connectionClass, entityPlayerClass, true);
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}
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return CONNECTION_ENTITY_ACCESSOR.get(playerConnection);
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}
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}
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