mirror of
https://github.com/dmulloy2/ProtocolLib.git
synced 2024-11-27 21:26:17 +01:00
[TinyProtocol] Format TinyProtocol
This commit is contained in:
Dan Mulloy
parent
66be4900a3
commit
115b5e8daa
@ -12,11 +12,13 @@ import org.bukkit.plugin.java.JavaPlugin;
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import com.comphenix.tinyprotocol.Reflection.ConstructorInvoker;
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import com.comphenix.tinyprotocol.Reflection.FieldAccessor;
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/**
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* Represents an example plugin utilizing TinyProtocol
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*/
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public class ExamplePlugin extends JavaPlugin {
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// Chat packets
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private FieldAccessor<String> CHAT_MESSAGE = Reflection.getField(
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"{nms}.PacketPlayInChat", String.class, 0);
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private FieldAccessor<String> CHAT_MESSAGE = Reflection.getField("{nms}.PacketPlayInChat", String.class, 0);
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// Explosion packet
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private Class<?> particleClass = Reflection.getClass("{nms}.PacketPlayOutWorldParticles");
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private FieldAccessor<String> particleName = Reflection.getField(particleClass, String.class, 0);
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@ -24,7 +26,7 @@ public class ExamplePlugin extends JavaPlugin {
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private FieldAccessor<Float> particleY = Reflection.getField(particleClass, float.class, 1);
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private FieldAccessor<Float> particleZ = Reflection.getField(particleClass, float.class, 2);
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private FieldAccessor<Integer> particleCount = Reflection.getField(particleClass, int.class, 0);
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// Server info packet
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private Class<?> serverInfoClass = Reflection.getClass("{nms}.PacketStatusOutServerInfo");
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private Class<Object> serverPingClass = Reflection.getUntypedClass("{nms}.ServerPing");
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@ -32,12 +34,13 @@ public class ExamplePlugin extends JavaPlugin {
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private FieldAccessor<Object> serverPing = Reflection.getField(serverInfoClass, serverPingClass, 0);
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private FieldAccessor<Object> playerSample = Reflection.getField(serverPingClass, playerSampleClass, 0);
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private ConstructorInvoker playerSampleInvoker = Reflection.getConstructor(playerSampleClass, int.class, int.class);
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private TinyProtocol protocol;
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@Override
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public void onEnable() {
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protocol = new TinyProtocol(this) {
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@Override
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public Object onPacketInAsync(Player sender, Channel channel, Object packet) {
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// Cancel chat packets
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@ -47,24 +50,28 @@ public class ExamplePlugin extends JavaPlugin {
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return null;
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}
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}
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if (particleName.hasField(packet)) {
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System.out.println("Sending particle field:" + packet);
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}
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return super.onPacketInAsync(sender, channel, packet);
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}
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@Override
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public Object onPacketOutAsync(Player reciever, Channel channel, Object packet) {
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if (serverInfoClass.isInstance(packet)) {
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Object ping = serverPing.get(packet);
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playerSample.set(ping, playerSampleInvoker.invoke(1000, 0));
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// Which is equivalent to:
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//serverPing.get(packet).setPlayerSample(new ServerPingPlayerSample(1000, 0));
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// serverPing.get(packet).setPlayerSample(new ServerPingPlayerSample(1000, 0));
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return packet;
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}
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return super.onPacketOutAsync(reciever, channel, packet);
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}
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};
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}
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@ -72,7 +79,7 @@ public class ExamplePlugin extends JavaPlugin {
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public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
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if (sender instanceof Player) {
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Player player = (Player) sender;
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// Toggle injection
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if (protocol.hasInjected(player)) {
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protocol.uninjectPlayer(player);
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@ -81,13 +88,15 @@ public class ExamplePlugin extends JavaPlugin {
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protocol.injectPlayer(player);
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sender.sendMessage(ChatColor.DARK_GREEN + "Player " + player + " has been injected.");
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}
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return true;
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} else {
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sender.sendMessage(ChatColor.RED + "Can only be invoked by a player.");
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}
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return false;
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}
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private void sendExplosion(Player player) {
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try {
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// Only visible for the client
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@ -101,9 +110,8 @@ public class ExamplePlugin extends JavaPlugin {
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// Send the packet to the player
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protocol.sendPacket(player, explosionPacket);
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} catch (Exception e) {
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throw new RuntimeException("Cannot send packet.", e);
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}
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}
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}
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}
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@ -11,75 +11,83 @@ import org.bukkit.Bukkit;
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/**
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* An utility class that simplifies reflection in Bukkit plugins.
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*
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* @author Kristian
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*/
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public final class Reflection {
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/**
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* An interface for invoking a specific constructor.
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* An interface for invoking a specific constructor.
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*/
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public interface ConstructorInvoker {
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/**
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* Invoke a constructor for a specific class.
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*
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* @param arguments - the arguments to pass to the constructor.
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* @return The constructed object.
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*/
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public Object invoke(Object... arguments);
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public Object invoke(Object... arguments);
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}
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/**
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* An interface for invoking a specific method.
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* An interface for invoking a specific method.
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*/
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public interface MethodInvoker {
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/**
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* Invoke a method on a specific target object.
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*
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* @param target - the target object, or NULL for a static method.
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* @param arguments - the arguments to pass to the method.
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* @return The return value, or NULL if is void.
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*/
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public Object invoke(Object target, Object... arguments);
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public Object invoke(Object target, Object... arguments);
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}
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/**
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* An interface for retrieving the field content.
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*
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* @param <T> - field type.
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*/
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public interface FieldAccessor<T> {
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/**
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* Retrieve the content of a field.
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*
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* @param target - the target object, or NULL for a static field.
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* @return The value of the field.
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*/
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public T get(Object target);
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/**
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* Set the content of a field.
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*
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* @param target - the target object, or NULL for a static field.
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* @param value - the new value of the field.
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*/
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public void set(Object target, Object value);
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/**
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* Determine if the given object has this field.
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*
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* @param target - the object to test.
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* @return TRUE if it does, FALSE otherwise.
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*/
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public boolean hasField(Object target);
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}
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// Deduce the net.minecraft.server.v* package
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private static String OBC_PREFIX = Bukkit.getServer().getClass().getPackage().getName();
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private static String NMS_PREFIX = OBC_PREFIX.replace("org.bukkit.craftbukkit", "net.minecraft.server");
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private static String VERSION = OBC_PREFIX.replace("org.bukkit.craftbukkit", "").replace(".", "");
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// Variable replacement
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private static Pattern MATCH_VARIABLE = Pattern.compile("\\{([^\\}]+)\\}");
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private Reflection() {
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// Seal class
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}
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/**
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* Retrieve a field accessor for a specific field type and name.
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*
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* @param target - the target type.
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* @param name - the name of the field, or NULL to ignore.
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* @param fieldType - a compatible field type.
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@ -88,9 +96,10 @@ public final class Reflection {
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public static <T> FieldAccessor<T> getField(Class<?> target, String name, Class<T> fieldType) {
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return getField(target, name, fieldType, 0);
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}
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/**
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* Retrieve a field accessor for a specific field type and name.
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*
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* @param className - lookup name of the class, see {@link #getClass(String)}.
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* @param name - the name of the field, or NULL to ignore.
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* @param fieldType - a compatible field type.
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@ -99,9 +108,10 @@ public final class Reflection {
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public static <T> FieldAccessor<T> getField(String className, String name, Class<T> fieldType) {
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return getField(getClass(className), name, fieldType, 0);
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}
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/**
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* Retrieve a field accessor for a specific field type and name.
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*
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* @param target - the target type.
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* @param fieldType - a compatible field type.
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* @param index - the number of compatible fields to skip.
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@ -110,9 +120,10 @@ public final class Reflection {
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public static <T> FieldAccessor<T> getField(Class<?> target, Class<T> fieldType, int index) {
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return getField(target, null, fieldType, index);
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}
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/**
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* Retrieve a field accessor for a specific field type and name.
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*
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* @param className - lookup name of the class, see {@link #getClass(String)}.
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* @param fieldType - a compatible field type.
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* @param index - the number of compatible fields to skip.
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@ -121,18 +132,18 @@ public final class Reflection {
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public static <T> FieldAccessor<T> getField(String className, Class<T> fieldType, int index) {
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return getField(getClass(className), fieldType, index);
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}
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// Common method
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private static <T> FieldAccessor<T> getField(Class<?> target, String name, Class<T> fieldType, int index) {
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for (final Field field : target.getDeclaredFields()) {
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if ((name == null || field.getName().equals(name)) &&
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fieldType.isAssignableFrom(field.getType()) && index-- <= 0) {
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if ((name == null || field.getName().equals(name)) && fieldType.isAssignableFrom(field.getType()) && index-- <= 0) {
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field.setAccessible(true);
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// A function for retrieving a specific field value
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return new FieldAccessor<T>() {
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@SuppressWarnings("unchecked")
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@Override
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@SuppressWarnings("unchecked")
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public T get(Object target) {
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try {
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return (T) field.get(target);
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@ -140,7 +151,7 @@ public final class Reflection {
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throw new RuntimeException("Cannot access reflection.", e);
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}
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}
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@Override
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public void set(Object target, Object value) {
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try {
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@ -149,7 +160,7 @@ public final class Reflection {
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throw new RuntimeException("Cannot access reflection.", e);
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}
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}
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@Override
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public boolean hasField(Object target) {
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// target instanceof DeclaringClass
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@ -158,218 +169,233 @@ public final class Reflection {
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};
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}
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}
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// Search in parent classes
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if (target.getSuperclass() != null)
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return getField(target.getSuperclass(), name, fieldType, index);
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throw new IllegalArgumentException("Cannot find field with type " + fieldType);
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}
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/**
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* Search for the first publically and privately defined method of the given name and parameter count.
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* @param className - lookup name of the class, see {@link #getClass(String)}.
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* @param methodName - the method name, or NULL to skip.
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* @param params - the expected parameters.
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* @return An object that invokes this specific method.
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* @throws IllegalStateException If we cannot find this method.
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*/
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/**
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* Search for the first publically and privately defined method of the given name and parameter count.
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*
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* @param className - lookup name of the class, see {@link #getClass(String)}.
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* @param methodName - the method name, or NULL to skip.
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* @param params - the expected parameters.
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* @return An object that invokes this specific method.
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* @throws IllegalStateException If we cannot find this method.
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*/
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public static MethodInvoker getMethod(String className, String methodName, Class<?>... params) {
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return getTypedMethod(getClass(className), methodName, null, params);
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}
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/**
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* Search for the first publically and privately defined method of the given name and parameter count.
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* @param clazz - a class to start with.
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* @param methodName - the method name, or NULL to skip.
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* @param params - the expected parameters.
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* @return An object that invokes this specific method.
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* @throws IllegalStateException If we cannot find this method.
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*/
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public static MethodInvoker getMethod(Class<?> clazz, String methodName, Class<?>... params) {
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return getTypedMethod(clazz, methodName, null, params);
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}
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/**
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* Search for the first publically and privately defined method of the given name and parameter count.
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* @param clazz - a class to start with.
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* @param methodName - the method name, or NULL to skip.
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* @param returnType - the expected return type, or NULL to ignore.
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* @param params - the expected parameters.
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* @return An object that invokes this specific method.
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* @throws IllegalStateException If we cannot find this method.
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*/
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public static MethodInvoker getTypedMethod(Class<?> clazz, String methodName, Class<?> returnType, Class<?>... params) {
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for (final Method method : clazz.getDeclaredMethods()) {
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if ((methodName == null || method.getName().equals(methodName)) &&
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(returnType == null) || method.getReturnType().equals(returnType) &&
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Arrays.equals(method.getParameterTypes(), params)) {
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method.setAccessible(true);
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return new MethodInvoker() {
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@Override
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public Object invoke(Object target, Object... arguments) {
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try {
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/**
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* Search for the first publically and privately defined method of the given name and parameter count.
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*
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* @param clazz - a class to start with.
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* @param methodName - the method name, or NULL to skip.
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* @param params - the expected parameters.
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* @return An object that invokes this specific method.
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* @throws IllegalStateException If we cannot find this method.
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*/
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public static MethodInvoker getMethod(Class<?> clazz, String methodName, Class<?>... params) {
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return getTypedMethod(clazz, methodName, null, params);
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}
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/**
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* Search for the first publically and privately defined method of the given name and parameter count.
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*
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* @param clazz - a class to start with.
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* @param methodName - the method name, or NULL to skip.
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* @param returnType - the expected return type, or NULL to ignore.
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* @param params - the expected parameters.
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* @return An object that invokes this specific method.
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* @throws IllegalStateException If we cannot find this method.
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*/
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public static MethodInvoker getTypedMethod(Class<?> clazz, String methodName, Class<?> returnType, Class<?>... params) {
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for (final Method method : clazz.getDeclaredMethods()) {
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if ((methodName == null || method.getName().equals(methodName)) && (returnType == null) || method.getReturnType().equals(returnType) && Arrays.equals(method.getParameterTypes(), params)) {
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method.setAccessible(true);
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return new MethodInvoker() {
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@Override
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public Object invoke(Object target, Object... arguments) {
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try {
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return method.invoke(target, arguments);
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} catch (Exception e) {
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throw new RuntimeException("Cannot invoke method " + method, e);
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}
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}
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};
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}
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}
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// Search in every superclass
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if (clazz.getSuperclass() != null)
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return getMethod(clazz.getSuperclass(), methodName, params);
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throw new IllegalStateException(String.format(
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"Unable to find method %s (%s).", methodName, Arrays.asList(params)));
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}
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/**
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* Search for the first publically and privately defined constructor of the given name and parameter count.
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* @param className - lookup name of the class, see {@link #getClass(String)}.
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* @param params - the expected parameters.
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* @return An object that invokes this constructor.
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* @throws IllegalStateException If we cannot find this method.
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*/
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public static ConstructorInvoker getConstructor(String className, Class<?>... params) {
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return getConstructor(getClass(className), params);
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}
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/**
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* Search for the first publically and privately defined constructor of the given name and parameter count.
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* @param clazz - a class to start with.
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* @param params - the expected parameters.
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* @return An object that invokes this constructor.
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* @throws IllegalStateException If we cannot find this method.
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*/
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public static ConstructorInvoker getConstructor(Class<?> clazz, Class<?>... params) {
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for (final Constructor<?> constructor : clazz.getDeclaredConstructors()) {
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if (Arrays.equals(constructor.getParameterTypes(), params)) {
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}
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constructor.setAccessible(true);
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return new ConstructorInvoker() {
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@Override
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public Object invoke(Object... arguments) {
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try {
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};
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}
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}
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// Search in every superclass
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if (clazz.getSuperclass() != null)
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return getMethod(clazz.getSuperclass(), methodName, params);
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throw new IllegalStateException(String.format("Unable to find method %s (%s).", methodName, Arrays.asList(params)));
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}
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/**
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* Search for the first publically and privately defined constructor of the given name and parameter count.
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*
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* @param className - lookup name of the class, see {@link #getClass(String)}.
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* @param params - the expected parameters.
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* @return An object that invokes this constructor.
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* @throws IllegalStateException If we cannot find this method.
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*/
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public static ConstructorInvoker getConstructor(String className, Class<?>... params) {
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return getConstructor(getClass(className), params);
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}
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/**
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* Search for the first publically and privately defined constructor of the given name and parameter count.
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*
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* @param clazz - a class to start with.
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* @param params - the expected parameters.
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* @return An object that invokes this constructor.
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* @throws IllegalStateException If we cannot find this method.
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*/
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public static ConstructorInvoker getConstructor(Class<?> clazz, Class<?>... params) {
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for (final Constructor<?> constructor : clazz.getDeclaredConstructors()) {
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if (Arrays.equals(constructor.getParameterTypes(), params)) {
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constructor.setAccessible(true);
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return new ConstructorInvoker() {
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@Override
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public Object invoke(Object... arguments) {
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try {
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return constructor.newInstance(arguments);
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} catch (Exception e) {
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throw new RuntimeException("Cannot invoke constructor " + constructor, e);
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}
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}
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};
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}
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}
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throw new IllegalStateException(String.format(
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"Unable to find constructor for %s (%s).", clazz, Arrays.asList(params)));
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}
|
||||
|
||||
/**
|
||||
* Retrieve a class from its full name, without knowing its type on compile time.
|
||||
* <p>
|
||||
* This is useful when looking up fields by a NMS or OBC type.
|
||||
* <p>
|
||||
* @see {@link #getClass()} for more information.
|
||||
* @param lookupName - the class name with variables.
|
||||
* @return The class.
|
||||
*/
|
||||
public static Class<Object> getUntypedClass(String lookupName) {
|
||||
@SuppressWarnings({"rawtypes", "unchecked"})
|
||||
Class<Object> clazz = (Class<Object>)(Class)getClass(lookupName);
|
||||
return clazz;
|
||||
}
|
||||
|
||||
/**
|
||||
* Retrieve a class from its full name.
|
||||
* <p>
|
||||
* Strings enclosed with curly brackets - such as {TEXT} - will be replaced according
|
||||
* to the following table:
|
||||
* <p>
|
||||
}
|
||||
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
throw new IllegalStateException(String.format("Unable to find constructor for %s (%s).", clazz, Arrays.asList(params)));
|
||||
}
|
||||
|
||||
/**
|
||||
* Retrieve a class from its full name, without knowing its type on compile time.
|
||||
* <p>
|
||||
* This is useful when looking up fields by a NMS or OBC type.
|
||||
* <p>
|
||||
*
|
||||
* @see {@link #getClass()} for more information.
|
||||
* @param lookupName - the class name with variables.
|
||||
* @return The class.
|
||||
*/
|
||||
public static Class<Object> getUntypedClass(String lookupName) {
|
||||
@SuppressWarnings({ "rawtypes", "unchecked" })
|
||||
Class<Object> clazz = (Class) getClass(lookupName);
|
||||
return clazz;
|
||||
}
|
||||
|
||||
/**
|
||||
* Retrieve a class from its full name.
|
||||
* <p>
|
||||
* Strings enclosed with curly brackets - such as {TEXT} - will be replaced according to the following table:
|
||||
* <p>
|
||||
* <table border="1">
|
||||
* <tr>
|
||||
* <th>Variable</th>
|
||||
* <th>Content</th>
|
||||
* </tr>
|
||||
* <tr>
|
||||
* <td>{nms}</td>
|
||||
* <td>Actual package name of net.minecraft.server.VERSION</td>
|
||||
* </tr>
|
||||
* <tr>
|
||||
* <td>{obc}</td>
|
||||
* <td>Actual pacakge name of org.bukkit.craftbukkit.VERSION</td>
|
||||
* </tr>
|
||||
* <tr>
|
||||
* <td>{version}</td>
|
||||
* <td>The current Minecraft package VERSION, if any.</td>
|
||||
* </tr>
|
||||
* <tr>
|
||||
* <th>Variable</th>
|
||||
* <th>Content</th>
|
||||
* </tr>
|
||||
* <tr>
|
||||
* <td>{nms}</td>
|
||||
* <td>Actual package name of net.minecraft.server.VERSION</td>
|
||||
* </tr>
|
||||
* <tr>
|
||||
* <td>{obc}</td>
|
||||
* <td>Actual pacakge name of org.bukkit.craftbukkit.VERSION</td>
|
||||
* </tr>
|
||||
* <tr>
|
||||
* <td>{version}</td>
|
||||
* <td>The current Minecraft package VERSION, if any.</td>
|
||||
* </tr>
|
||||
* </table>
|
||||
* @param lookupName - the class name with variables.
|
||||
* @return The looked up class.
|
||||
* @throws IllegalArgumentException If a variable or class could not be found.
|
||||
*/
|
||||
public static Class<?> getClass(String lookupName) {
|
||||
return getCanonicalClass(expandVariables(lookupName));
|
||||
}
|
||||
|
||||
*
|
||||
* @param lookupName - the class name with variables.
|
||||
* @return The looked up class.
|
||||
* @throws IllegalArgumentException If a variable or class could not be found.
|
||||
*/
|
||||
public static Class<?> getClass(String lookupName) {
|
||||
return getCanonicalClass(expandVariables(lookupName));
|
||||
}
|
||||
|
||||
/**
|
||||
* Retrieve a class in the net.minecraft.server.VERSION.* package.
|
||||
*
|
||||
* @param name - the name of the class, excluding the package.
|
||||
* @throws IllegalArgumentException If the class doesn't exist.
|
||||
*/
|
||||
public static Class<?> getMinecraftClass(String name) {
|
||||
return getCanonicalClass(NMS_PREFIX + "." + name);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Retrieve a class in the org.bukkit.craftbukkit.VERSION.* package.
|
||||
*
|
||||
* @param name - the name of the class, excluding the package.
|
||||
* @throws IllegalArgumentException If the class doesn't exist.
|
||||
*/
|
||||
public static Class<?> getCraftBukkitClass(String name) {
|
||||
return getCanonicalClass(OBC_PREFIX + "." + name);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Retrieve a class by its canonical name.
|
||||
*
|
||||
* @param canonicalName - the canonical name.
|
||||
* @return The class.
|
||||
*/
|
||||
private static Class<?> getCanonicalClass(String canonicalName) {
|
||||
try {
|
||||
try {
|
||||
return Class.forName(canonicalName);
|
||||
} catch (ClassNotFoundException e) {
|
||||
throw new IllegalArgumentException("Cannot find " + canonicalName, e);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Expand variables such as "{nms}" and "{obc}" to their corresponding packages.
|
||||
*
|
||||
* @param name - the full name of the class.
|
||||
* @return The expanded string.
|
||||
*/
|
||||
private static String expandVariables(String name) {
|
||||
StringBuffer output = new StringBuffer();
|
||||
Matcher matcher = MATCH_VARIABLE.matcher(name);
|
||||
|
||||
while (matcher.find()) {
|
||||
String variable = matcher.group(1);
|
||||
String replacement = "";
|
||||
|
||||
// Expand all detected variables
|
||||
if ("nms".equalsIgnoreCase(variable))
|
||||
replacement = NMS_PREFIX;
|
||||
else if ("obc".equalsIgnoreCase(variable))
|
||||
replacement = OBC_PREFIX;
|
||||
else if ("version".equalsIgnoreCase(variable))
|
||||
replacement = VERSION;
|
||||
else
|
||||
throw new IllegalArgumentException("Unknown variable: " + variable);
|
||||
|
||||
// Assume the expanded variables are all packages, and append a dot
|
||||
if (replacement.length() > 0 && matcher.end() < name.length() && name.charAt(matcher.end()) != '.')
|
||||
replacement += ".";
|
||||
matcher.appendReplacement(output, Matcher.quoteReplacement(replacement));
|
||||
}
|
||||
matcher.appendTail(output);
|
||||
return output.toString();
|
||||
StringBuffer output = new StringBuffer();
|
||||
Matcher matcher = MATCH_VARIABLE.matcher(name);
|
||||
|
||||
while (matcher.find()) {
|
||||
String variable = matcher.group(1);
|
||||
String replacement = "";
|
||||
|
||||
// Expand all detected variables
|
||||
if ("nms".equalsIgnoreCase(variable))
|
||||
replacement = NMS_PREFIX;
|
||||
else if ("obc".equalsIgnoreCase(variable))
|
||||
replacement = OBC_PREFIX;
|
||||
else if ("version".equalsIgnoreCase(variable))
|
||||
replacement = VERSION;
|
||||
else
|
||||
throw new IllegalArgumentException("Unknown variable: " + variable);
|
||||
|
||||
// Assume the expanded variables are all packages, and append a dot
|
||||
if (replacement.length() > 0 && matcher.end() < name.length() && name.charAt(matcher.end()) != '.')
|
||||
replacement += ".";
|
||||
matcher.appendReplacement(output, Matcher.quoteReplacement(replacement));
|
||||
}
|
||||
|
||||
matcher.appendTail(output);
|
||||
return output.toString();
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -34,65 +34,67 @@ import com.google.common.collect.MapMaker;
|
||||
import com.mojang.authlib.GameProfile;
|
||||
|
||||
/**
|
||||
* Represents a very tiny alternative to ProtocolLib in 1.7.2.
|
||||
* Represents a very tiny alternative to ProtocolLib.
|
||||
* <p>
|
||||
* It now supports intercepting packets during login and status ping (such as OUT_SERVER_PING)!
|
||||
*
|
||||
* @author Kristian
|
||||
*/
|
||||
public abstract class TinyProtocol {
|
||||
private static final AtomicInteger ID = new AtomicInteger(0);
|
||||
|
||||
|
||||
// Used in order to lookup a channel
|
||||
private static final MethodInvoker getPlayerHandle = Reflection.getMethod("{obc}.entity.CraftPlayer", "getHandle");
|
||||
private static final FieldAccessor<Object> getConnection = Reflection.getField("{nms}.EntityPlayer", "playerConnection", Object.class);
|
||||
private static final FieldAccessor<Object> getManager = Reflection.getField("{nms}.PlayerConnection", "networkManager", Object.class);
|
||||
private static final FieldAccessor<Channel> getChannel = Reflection.getField("{nms}.NetworkManager", Channel.class, 0);
|
||||
|
||||
|
||||
// Looking up ServerConnection
|
||||
private static final Class<Object> minecraftServerClass = Reflection.getUntypedClass("{nms}.MinecraftServer");
|
||||
private static final Class<Object> serverConnectionClass = Reflection.getUntypedClass("{nms}.ServerConnection");
|
||||
private static final FieldAccessor<Object> getMinecraftServer = Reflection.getField("{obc}.CraftServer", minecraftServerClass, 0);
|
||||
private static final FieldAccessor<Object> getServerConnection = Reflection.getField(minecraftServerClass, serverConnectionClass, 0);
|
||||
private static final MethodInvoker getNetworkMarkers = Reflection.getTypedMethod(serverConnectionClass, null, List.class, serverConnectionClass);
|
||||
|
||||
|
||||
// Packets we have to intercept
|
||||
private static final Class<?> PACKET_LOGIN_IN_START = Reflection.getMinecraftClass("PacketLoginInStart");
|
||||
private static final FieldAccessor<GameProfile> getGameProfile = Reflection.getField(PACKET_LOGIN_IN_START, GameProfile.class, 0);
|
||||
|
||||
|
||||
// Speedup channel lookup
|
||||
private Map<String, Channel> channelLookup = new MapMaker().weakValues().makeMap();
|
||||
private Listener listener;
|
||||
|
||||
|
||||
// Channels that have already been removed
|
||||
private Set<Channel> uninjectedChannels = Collections.newSetFromMap(new MapMaker().weakKeys().<Channel, Boolean>makeMap());
|
||||
|
||||
|
||||
// List of network markers
|
||||
private List<Object> networkManagers;
|
||||
|
||||
|
||||
// Injected channel handlers
|
||||
private List<Channel> serverChannels = Lists.newArrayList();
|
||||
private ChannelInboundHandlerAdapter serverChannelHandler;
|
||||
private ChannelInitializer<Channel> beginInitProtocol;
|
||||
private ChannelInitializer<Channel> endInitProtocol;
|
||||
|
||||
|
||||
// Current handler name
|
||||
private String handlerName;
|
||||
|
||||
|
||||
protected volatile boolean closed;
|
||||
protected Plugin plugin;
|
||||
|
||||
|
||||
/**
|
||||
* Construct a new instance of TinyProtocol, and start intercepting packets for all connected clients and future clients.
|
||||
* <p>
|
||||
* You can construct multiple instances per plugin.
|
||||
*
|
||||
* @param plugin - the plugin.
|
||||
*/
|
||||
public TinyProtocol(Plugin plugin) {
|
||||
this.plugin = plugin;
|
||||
|
||||
|
||||
// Compute handler name
|
||||
this.handlerName = getHandlerName();
|
||||
|
||||
|
||||
// Prepare existing players
|
||||
registerBukkitEvents();
|
||||
registerChannelHandler();
|
||||
@ -100,109 +102,119 @@ public abstract class TinyProtocol {
|
||||
}
|
||||
|
||||
private void createServerChannelHandler() {
|
||||
// Handle connected channels
|
||||
endInitProtocol = new ChannelInitializer<Channel>() {
|
||||
@Override
|
||||
protected void initChannel(Channel channel) throws Exception {
|
||||
try {
|
||||
// This can take a while, so we need to stop the main thread from interfering
|
||||
synchronized (networkManagers) {
|
||||
// Stop injecting channels
|
||||
if (closed)
|
||||
return;
|
||||
injectChannelInternal(channel);
|
||||
}
|
||||
} catch (Exception e) {
|
||||
plugin.getLogger().log(Level.SEVERE, "Cannot inject incomming channel " + channel, e);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
// This is executed before Minecraft's channel handler
|
||||
beginInitProtocol = new ChannelInitializer<Channel>() {
|
||||
@Override
|
||||
protected void initChannel(Channel channel) throws Exception {
|
||||
channel.pipeline().addLast(endInitProtocol);
|
||||
}
|
||||
};
|
||||
|
||||
serverChannelHandler = new ChannelInboundHandlerAdapter() {
|
||||
@Override
|
||||
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
|
||||
Channel channel = (Channel) msg;
|
||||
// Handle connected channels
|
||||
endInitProtocol = new ChannelInitializer<Channel>() {
|
||||
|
||||
// Prepare to initialize ths channel
|
||||
channel.pipeline().addFirst(beginInitProtocol);
|
||||
ctx.fireChannelRead(msg);
|
||||
}
|
||||
};
|
||||
}
|
||||
@Override
|
||||
protected void initChannel(Channel channel) throws Exception {
|
||||
try {
|
||||
// This can take a while, so we need to stop the main thread from interfering
|
||||
synchronized (networkManagers) {
|
||||
// Stop injecting channels
|
||||
if (!closed) {
|
||||
injectChannelInternal(channel);
|
||||
}
|
||||
}
|
||||
} catch (Exception e) {
|
||||
plugin.getLogger().log(Level.SEVERE, "Cannot inject incomming channel " + channel, e);
|
||||
}
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
// This is executed before Minecraft's channel handler
|
||||
beginInitProtocol = new ChannelInitializer<Channel>() {
|
||||
|
||||
@Override
|
||||
protected void initChannel(Channel channel) throws Exception {
|
||||
channel.pipeline().addLast(endInitProtocol);
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
serverChannelHandler = new ChannelInboundHandlerAdapter() {
|
||||
|
||||
@Override
|
||||
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
|
||||
Channel channel = (Channel) msg;
|
||||
|
||||
// Prepare to initialize ths channel
|
||||
channel.pipeline().addFirst(beginInitProtocol);
|
||||
ctx.fireChannelRead(msg);
|
||||
}
|
||||
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* Register bukkit events.
|
||||
*/
|
||||
private void registerBukkitEvents() {
|
||||
listener = new Listener() {
|
||||
|
||||
@EventHandler(priority = EventPriority.LOWEST)
|
||||
public final void onPlayerLogin(PlayerLoginEvent e) {
|
||||
if (closed)
|
||||
return;
|
||||
|
||||
Channel channel = getChannel(e.getPlayer());
|
||||
|
||||
|
||||
// Don't inject players that have been explicitly uninjected
|
||||
if (!uninjectedChannels.contains(channel)) {
|
||||
injectPlayer(e.getPlayer());
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@EventHandler
|
||||
public final void onPluginDisable(PluginDisableEvent e) {
|
||||
if (e.getPlugin().equals(plugin)) {
|
||||
close();
|
||||
}
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
this.plugin.getServer().getPluginManager().registerEvents(listener, plugin);
|
||||
|
||||
plugin.getServer().getPluginManager().registerEvents(listener, plugin);
|
||||
}
|
||||
|
||||
|
||||
@SuppressWarnings("unchecked")
|
||||
private void registerChannelHandler() {
|
||||
Object mcServer = getMinecraftServer.get(Bukkit.getServer());
|
||||
Object serverConnection = getServerConnection.get(mcServer);
|
||||
boolean looking = true;
|
||||
|
||||
|
||||
// We need to synchronize against this list
|
||||
networkManagers = (List<Object>) getNetworkMarkers.invoke(null, serverConnection);
|
||||
createServerChannelHandler();
|
||||
|
||||
|
||||
// Find the correct list, or implicitly throw an exception
|
||||
for (int i = 0; looking; i++) {
|
||||
List<Object> list = Reflection.getField(serverConnection.getClass(), List.class, i).get(serverConnection);
|
||||
|
||||
|
||||
for (Object item : list) {
|
||||
if (!ChannelFuture.class.isInstance(item))
|
||||
break;
|
||||
|
||||
|
||||
// Channel future that contains the server connection
|
||||
Channel serverChannel = ((ChannelFuture)item).channel();
|
||||
|
||||
Channel serverChannel = ((ChannelFuture) item).channel();
|
||||
|
||||
serverChannels.add(serverChannel);
|
||||
serverChannel.pipeline().addFirst(serverChannelHandler);
|
||||
looking = false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
private void unregisterChannelHandler() {
|
||||
if (serverChannelHandler == null)
|
||||
return;
|
||||
|
||||
|
||||
for (Channel serverChannel : serverChannels) {
|
||||
final ChannelPipeline pipeline = serverChannel.pipeline();
|
||||
|
||||
|
||||
// Remove channel handler
|
||||
serverChannel.eventLoop().execute(new Runnable() {
|
||||
|
||||
@Override
|
||||
public void run() {
|
||||
try {
|
||||
@ -211,20 +223,22 @@ public abstract class TinyProtocol {
|
||||
// That's fine
|
||||
}
|
||||
}
|
||||
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
private void registerPlayers(Plugin plugin) {
|
||||
for (Player player : plugin.getServer().getOnlinePlayers()) {
|
||||
injectPlayer(player);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Invoked when the server is starting to send a packet to a player.
|
||||
* <p>
|
||||
* Note that this is not executed on the main thread.
|
||||
*
|
||||
* @param reciever - the receiving player, NULL for early login/status packets.
|
||||
* @param remoteAddress - remote address of the sending client. Never NULL.
|
||||
* @param packet - the packet being sent.
|
||||
@ -238,6 +252,7 @@ public abstract class TinyProtocol {
|
||||
* Invoked when the server has received a packet from a given player.
|
||||
* <p>
|
||||
* Use {@link Channel#remoteAddress()} to get the remote address of the client.
|
||||
*
|
||||
* @param sender - the player that sent the packet, NULL for early login/status packets.
|
||||
* @param channel - channel that received the packet. Never NULL.
|
||||
* @param packet - the packet being received.
|
||||
@ -246,133 +261,145 @@ public abstract class TinyProtocol {
|
||||
public Object onPacketInAsync(Player sender, Channel channel, Object packet) {
|
||||
return packet;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Send a packet to a particular player.
|
||||
* <p>
|
||||
* Note that {@link #onPacketOutAsync(Player, Object)} will be invoked with this packet.
|
||||
*
|
||||
* @param player - the destination player.
|
||||
* @param packet - the packet to send.
|
||||
*/
|
||||
public void sendPacket(Player player, Object packet) {
|
||||
sendPacket(getChannel(player), packet);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Send a packet to a particular client.
|
||||
* <p>
|
||||
* Note that {@link #onPacketOutAsync(Player, Object)} will be invoked with this packet.
|
||||
*
|
||||
* @param channel - client identified by a channel.
|
||||
* @param packet - the packet to send.
|
||||
*/
|
||||
public void sendPacket(Channel channel, Object packet) {
|
||||
channel.pipeline().writeAndFlush(packet);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Pretend that a given packet has been received from a player.
|
||||
* <p>
|
||||
* Note that {@link #onPacketInAsync(Player, Object)} will be invoked with this packet.
|
||||
*
|
||||
* @param player - the player that sent the packet.
|
||||
* @param packet - the packet that will be received by the server.
|
||||
*/
|
||||
public void receivePacket(Player player, Object packet) {
|
||||
receivePacket(getChannel(player), packet);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Pretend that a given packet has been received from a given client.
|
||||
* <p>
|
||||
* Note that {@link #onPacketInAsync(Player, Object)} will be invoked with this packet.
|
||||
*
|
||||
* @param channel - client identified by a channel.
|
||||
* @param packet - the packet that will be received by the server.
|
||||
*/
|
||||
public void receivePacket(Channel channel, Object packet) {
|
||||
channel.pipeline().context("encoder").fireChannelRead(packet);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Retrieve the name of the channel injector, default implementation is "tiny-" + plugin name + "-" + a unique ID.
|
||||
* <p>
|
||||
* Note that this method will only be invoked once. It is no longer necessary to override this to support multiple instances.
|
||||
*
|
||||
* @return A unique channel handler name.
|
||||
*/
|
||||
protected String getHandlerName() {
|
||||
return "tiny-" + plugin.getName() + "-" + ID.incrementAndGet();
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Add a custom channel handler to the given player's channel pipeline,
|
||||
* allowing us to intercept sent and received packets.
|
||||
* Add a custom channel handler to the given player's channel pipeline, allowing us to intercept sent and received packets.
|
||||
* <p>
|
||||
* This will automatically be called when a player has logged in.
|
||||
*
|
||||
* @param player - the player to inject.
|
||||
*/
|
||||
public void injectPlayer(Player player) {
|
||||
injectChannelInternal(getChannel(player)).player = player;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Add a custom channel handler to the given channel.
|
||||
*
|
||||
* @param player - the channel to inject.
|
||||
* @return The intercepted channel, or NULL if it has already been injected.
|
||||
*/
|
||||
public void injectChannel(Channel channel) {
|
||||
injectChannelInternal(channel);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Add a custom channel handler to the given channel.
|
||||
*
|
||||
* @param player - the channel to inject.
|
||||
* @return The packet interceptor.
|
||||
*/
|
||||
private PacketInterceptor injectChannelInternal(Channel channel) {
|
||||
try {
|
||||
PacketInterceptor interceptor = (PacketInterceptor) channel.pipeline().get(handlerName);
|
||||
|
||||
|
||||
// Inject our packet interceptor
|
||||
if (interceptor == null) {
|
||||
interceptor = new PacketInterceptor();
|
||||
channel.pipeline().addBefore("packet_handler", handlerName, interceptor);
|
||||
uninjectedChannels.remove(channel);
|
||||
}
|
||||
|
||||
return interceptor;
|
||||
} catch (IllegalArgumentException e) {
|
||||
// Try again
|
||||
return (PacketInterceptor) channel.pipeline().get(handlerName);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Retrieve the Netty channel associated with a player. This is cached.
|
||||
*
|
||||
* @param player - the player.
|
||||
* @return The Netty channel.
|
||||
*/
|
||||
public Channel getChannel(Player player) {
|
||||
Channel channel = channelLookup.get(player.getName());
|
||||
|
||||
|
||||
// Lookup channel again
|
||||
if (channel == null) {
|
||||
Object connection = getConnection.get(getPlayerHandle.invoke(player));
|
||||
Object manager = getManager.get(connection);
|
||||
|
||||
|
||||
channelLookup.put(player.getName(), channel = getChannel.get(manager));
|
||||
}
|
||||
|
||||
return channel;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Uninject a specific player.
|
||||
*
|
||||
* @param player - the injected player.
|
||||
*/
|
||||
public void uninjectPlayer(Player player) {
|
||||
uninjectChannel(getChannel(player));
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Uninject a specific channel.
|
||||
* <p>
|
||||
* This will also disable the automatic channel injection that occurs when a player has properly logged in.
|
||||
*
|
||||
* @param channel - the injected channel.
|
||||
*/
|
||||
public void uninjectChannel(final Channel channel) {
|
||||
@ -380,75 +407,82 @@ public abstract class TinyProtocol {
|
||||
if (!closed) {
|
||||
uninjectedChannels.add(channel);
|
||||
}
|
||||
|
||||
|
||||
// See ChannelInjector in ProtocolLib, line 590
|
||||
channel.eventLoop().execute(new Runnable() {
|
||||
|
||||
@Override
|
||||
public void run() {
|
||||
channel.pipeline().remove(handlerName);
|
||||
}
|
||||
|
||||
});
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Determine if the given player has been injected by TinyProtocol.
|
||||
*
|
||||
* @param player - the player.
|
||||
* @return TRUE if it is, FALSE otherwise.
|
||||
*/
|
||||
public boolean hasInjected(Player player) {
|
||||
return hasInjected(getChannel(player));
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Determine if the given channel has been injected by TinyProtocol.
|
||||
*
|
||||
* @param channel - the channel.
|
||||
* @return TRUE if it is, FALSE otherwise.
|
||||
*/
|
||||
public boolean hasInjected(Channel channel) {
|
||||
return channel.pipeline().get(handlerName) != null;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Cease listening for packets. This is called automatically when your plugin is disabled.
|
||||
*/
|
||||
public final void close() {
|
||||
if (!closed) {
|
||||
closed = true;
|
||||
|
||||
|
||||
// Remove our handlers
|
||||
for (Player player : plugin.getServer().getOnlinePlayers()) {
|
||||
uninjectPlayer(player);
|
||||
}
|
||||
|
||||
// Clean up Bukkit
|
||||
HandlerList.unregisterAll(listener);
|
||||
unregisterChannelHandler();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Channel handler that is inserted into the player's channel pipeline, allowing us to intercept sent and received packets.
|
||||
*
|
||||
* @author Kristian
|
||||
*/
|
||||
private final class PacketInterceptor extends ChannelDuplexHandler {
|
||||
// Updated by the login event
|
||||
public volatile Player player;
|
||||
|
||||
|
||||
@Override
|
||||
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
|
||||
// Intercept channel
|
||||
final Channel channel = ctx.channel();
|
||||
handleLoginStart(channel, msg);
|
||||
|
||||
|
||||
try {
|
||||
msg = onPacketInAsync(player, channel, msg);
|
||||
} catch (Exception e) {
|
||||
plugin.getLogger().log(Level.SEVERE, "Error in onPacketInAsync().", e);
|
||||
}
|
||||
|
||||
|
||||
if (msg != null) {
|
||||
super.channelRead(ctx, msg);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
|
||||
try {
|
||||
@ -456,12 +490,12 @@ public abstract class TinyProtocol {
|
||||
} catch (Exception e) {
|
||||
plugin.getLogger().log(Level.SEVERE, "Error in onPacketOutAsync().", e);
|
||||
}
|
||||
|
||||
|
||||
if (msg != null) {
|
||||
super.write(ctx, msg, promise);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
private void handleLoginStart(Channel channel, Object packet) {
|
||||
if (PACKET_LOGIN_IN_START.isInstance(packet)) {
|
||||
GameProfile profile = getGameProfile.get(packet);
|
||||
@ -469,4 +503,4 @@ public abstract class TinyProtocol {
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user