package eu.thog.uhcrun.utils;
import org.bukkit.Bukkit;
import java.lang.reflect.*;
import java.util.HashMap;
import java.util.Map;
public final class Reflection
{
private Reflection()
{
}
public static String getVersion()
{
String name = Bukkit.getServer().getClass().getPackage().getName();
return name.substring(name.lastIndexOf('.') + 1);
}
public static Class<?> getNMSClass(String className)
{
String fullName = "net.minecraft.server." + getVersion() + "." + className;
Class<?> clazz = null;
try
{
clazz = Class.forName(fullName);
} catch (Exception e)
{
e.printStackTrace();
}
return clazz;
}
public static Class<?> getOBCClass(String className)
{
String fullName = "org.bukkit.craftbukkit." + getVersion() + "." + className;
Class<?> clazz = null;
try
{
clazz = Class.forName(fullName);
} catch (Exception e)
{
e.printStackTrace();
}
return clazz;
}
/**
* Returns the constructor of a given class with the given parameter types
*
* @param clazz Target class
* @param parameterTypes Parameter types of the desired constructor
* @return The constructor of the target class with the specified parameter types
* @throws NoSuchMethodException If the desired constructor with the specified parameter types cannot be found
* @see DataType
* @see DataType#getPrimitive(Class[])
* @see DataType#compare(Class[], Class[])
*/
public static Constructor<?> getConstructor(Class<?> clazz, Class<?>... parameterTypes) throws NoSuchMethodException
{
Class<?>[] primitiveTypes = DataType.getPrimitive(parameterTypes);
for (Constructor<?> constructor : clazz.getConstructors())
{
if (!DataType.compare(DataType.getPrimitive(constructor.getParameterTypes()), primitiveTypes))
{
continue;
}
return constructor;
}
throw new NoSuchMethodException("There is no such constructor in this class with the specified parameter types");
}
/**
* Returns an instance of a class with the given arguments
*
* @param clazz Target class
* @param arguments Arguments which are used to construct an object of the target class
* @return The instance of the target class with the specified arguments
* @throws InstantiationException If you cannot create an instance of the target class due to certain circumstances
* @throws IllegalAccessException If the desired constructor cannot be accessed due to certain circumstances
* @throws IllegalArgumentException If the types of the arguments do not match the parameter types of the constructor (this should not occur since it searches for a constructor with the types of the arguments)
* @throws InvocationTargetException If the desired constructor cannot be invoked
* @throws NoSuchMethodException If the desired constructor with the specified arguments cannot be found
*/
public static Object instantiateObject(Class<?> clazz, Object... arguments) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException
{
return getConstructor(clazz, DataType.getPrimitive(arguments)).newInstance(arguments);
}
/**
* Returns a method of a class with the given parameter types
*
* @param clazz Target class
* @param methodName Name of the desired method
* @param parameterTypes Parameter types of the desired method
* @return The method of the target class with the specified name and parameter types
* @throws NoSuchMethodException If the desired method of the target class with the specified name and parameter types cannot be found
* @see DataType#getPrimitive(Class[])
* @see DataType#compare(Class[], Class[])
*/
public static Method getMethod(Class<?> clazz, String methodName, Class<?>... parameterTypes) throws NoSuchMethodException
{
Class<?>[] primitiveTypes = DataType.getPrimitive(parameterTypes);
for (Method method : clazz.getMethods())
{
if (!method.getName().equals(methodName) || !DataType.compare(DataType.getPrimitive(method.getParameterTypes()), primitiveTypes))
{
continue;
}
return method;
}
throw new NoSuchMethodException("There is no such method in this class with the specified name and parameter types");
}
/**
* Invokes a method of the target class on an object with the given arguments
*
* @param instance Target object
* @param clazz Target class
* @param methodName Name of the desired method
* @param arguments Arguments which are used to invoke the desired method
* @return The result of invoking the desired method on the target object
* @throws IllegalAccessException If the desired method cannot be accessed due to certain circumstances
* @throws IllegalArgumentException If the types of the arguments do not match the parameter types of the method (this should not occur since it searches for a method with the types of the arguments)
* @throws InvocationTargetException If the desired method cannot be invoked on the target object
* @throws NoSuchMethodException If the desired method of the target class with the specified name and arguments cannot be found
* @see #getMethod(Class, String, Class...)
* @see DataType#getPrimitive(Object[])
*/
public static Object invokeMethod(Object instance, Class<?> clazz, String methodName, Object... arguments) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException
{
return getMethod(clazz, methodName, DataType.getPrimitive(arguments)).invoke(instance, arguments);
}
/**
* Returns a field of the target class with the given name
*
* @param clazz Target class
* @param declared Whether the desired field is declared or not
* @param fieldName Name of the desired field
* @return The field of the target class with the specified name
* @throws NoSuchFieldException If the desired field of the given class cannot be found
* @throws SecurityException If the desired field cannot be made accessible
*/
public static Field getField(Class<?> clazz, boolean declared, String fieldName) throws NoSuchFieldException, SecurityException
{
Field field = declared ? clazz.getDeclaredField(fieldName) : clazz.getField(fieldName);
field.setAccessible(true);
return field;
}
/**
* Returns the value of a field of the given class of an object
*
* @param instance Target object
* @param clazz Target class
* @param declared Whether the desired field is declared or not
* @param fieldName Name of the desired field
* @return The value of field of the target object
* @throws IllegalArgumentException If the target object does not feature the desired field
* @throws IllegalAccessException If the desired field cannot be accessed
* @throws NoSuchFieldException If the desired field of the target class cannot be found
* @throws SecurityException If the desired field cannot be made accessible
* @see #getField(Class, boolean, String)
*/
public static Object getValue(Object instance, Class<?> clazz, boolean declared, String fieldName) throws IllegalArgumentException, IllegalAccessException, NoSuchFieldException, SecurityException
{
return getField(clazz, declared, fieldName).get(instance);
}
/**
* Returns the value of a field with the given name of an object
*
* @param instance Target object
* @param declared Whether the desired field is declared or not
* @param fieldName Name of the desired field
* @return The value of field of the target object
* @throws IllegalArgumentException If the target object does not feature the desired field (should not occur since it searches for a field with the given name in the class of the object)
* @throws IllegalAccessException If the desired field cannot be accessed
* @throws NoSuchFieldException If the desired field of the target object cannot be found
* @throws SecurityException If the desired field cannot be made accessible
* @see #getValue(Object, Class, boolean, String)
*/
public static Object getValue(Object instance, boolean declared, String fieldName) throws IllegalArgumentException, IllegalAccessException, NoSuchFieldException, SecurityException
{
return getValue(instance, instance.getClass(), declared, fieldName);
}
/**
* Sets the value of a field of the given class of an object
*
* @param instance Target object
* @param clazz Target class
* @param declared Whether the desired field is declared or not
* @param fieldName Name of the desired field
* @param value New value
* @throws IllegalArgumentException If the type of the value does not match the type of the desired field
* @throws IllegalAccessException If the desired field cannot be accessed
* @throws NoSuchFieldException If the desired field of the target class cannot be found
* @throws SecurityException If the desired field cannot be made accessible
* @see #getField(Class, boolean, String)
*/
public static void setValue(Object instance, Class<?> clazz, boolean declared, String fieldName, Object value) throws IllegalArgumentException, IllegalAccessException, NoSuchFieldException, SecurityException
{
getField(clazz, declared, fieldName).set(instance, value);
}
/**
* Sets the value of a field with the given name of an object
*
* @param instance Target object
* @param declared Whether the desired field is declared or not
* @param fieldName Name of the desired field
* @param value New value
* @throws IllegalArgumentException If the type of the value does not match the type of the desired field
* @throws IllegalAccessException If the desired field cannot be accessed
* @throws NoSuchFieldException If the desired field of the target object cannot be found
* @throws SecurityException If the desired field cannot be made accessible
* @see #setValue(Object, Class, boolean, String, Object)
*/
public static void setValue(Object instance, boolean declared, String fieldName, Object value) throws IllegalArgumentException, IllegalAccessException, NoSuchFieldException, SecurityException
{
setValue(instance, instance.getClass(), declared, fieldName, value);
}
/**
* Sets a value of an {@link Object} via reflection
*
* @param instance instance the class to use
* @param fieldName the name of the {@link java.lang.reflect.Field} to modify
* @param value the value to set
* @throws NoSuchFieldException, IllegalAccessException
*/
public static void setValue(Object instance, String fieldName, Object value) throws NoSuchFieldException, IllegalAccessException
{
setValue(instance, true, fieldName, value);
}
/**
* Set a final static var
*
* @param field The field object
* @param value The new value
* @throws ReflectiveOperationException
*/
public static void setFinalStatic(Field field, Object value) throws ReflectiveOperationException
{
field.setAccessible(true);
Field mf = Field.class.getDeclaredField("modifiers");
mf.setAccessible(true);
mf.setInt(field, field.getModifiers() & ~Modifier.FINAL);
field.set(null, value);
}
/**
* Represents an enumeration of dynamic packages of NMS and CraftBukkit
* <p>
* This class is part of the <b>ReflectionUtils</b> and follows the same usage conditions
*
* @author DarkBlade12
* @since 1.0
*/
public enum PackageType
{
MINECRAFT_SERVER("net.minecraft.server." + getServerVersion()),
CRAFTBUKKIT("org.bukkit.craftbukkit." + getServerVersion());
private final String path;
/**
* Construct a new package type
*
* @param path Path of the package
*/
PackageType(String path)
{
this.path = path;
}
/**
* Construct a new package type
*
* @param parent Parent package of the package
* @param path Path of the package
*/
PackageType(PackageType parent, String path)
{
this(parent + "." + path);
}
/**
* Returns the version of your server
*
* @return The server version
*/
public static String getServerVersion()
{
return Bukkit.getServer().getClass().getPackage().getName().substring(23);
}
/**
* Returns the class with the given name
*
* @param className Name of the desired class
* @return The class with the specified name
* @throws ClassNotFoundException If the desired class with the specified name and package cannot be found
*/
public Class<?> getClass(String className) throws ClassNotFoundException
{
return Class.forName(this + "." + className);
}
// Override for convenience
@Override
public String toString()
{
return path;
}
}
/**
* Represents an enumeration of Java data types with corresponding classes
* <p>
* This class is part of the <b>ReflectionUtils</b> and follows the same usage conditions
*
* @author DarkBlade12 (Edited by Thog)
* @since 1.0
*/
public enum DataType
{
BYTE(byte.class, Byte.class),
SHORT(short.class, Short.class),
INTEGER(int.class, Integer.class),
LONG(long.class, Long.class),
CHARACTER(char.class, Character.class),
FLOAT(float.class, Float.class),
DOUBLE(double.class, Double.class),
BOOLEAN(boolean.class, Boolean.class);
private static final Map<Class<?>, DataType> CLASS_MAP = new HashMap<>();
// Initialize map for quick class lookup
static
{
for (DataType type : values())
{
CLASS_MAP.put(type.primitive, type);
CLASS_MAP.put(type.reference, type);
}
}
private final Class<?> primitive;
private final Class<?> reference;
/**
* Construct a new data type
*
* @param primitive Primitive class of this data type
* @param reference Reference class of this data type
*/
DataType(Class<?> primitive, Class<?> reference)
{
this.primitive = primitive;
this.reference = reference;
}
/**
* Returns the data type with the given primitive/reference class
*
* @param clazz Primitive/Reference class of the data type
* @return The data type
*/
public static DataType fromClass(Class<?> clazz)
{
return CLASS_MAP.get(clazz);
}
/**
* Returns the primitive class of the data type with the given reference class
*
* @param clazz Reference class of the data type
* @return The primitive class
*/
public static Class<?> getPrimitive(Class<?> clazz)
{
DataType type = fromClass(clazz);
return type == null ? clazz : type.getPrimitive();
}
/**
* Returns the reference class of the data type with the given primitive class
*
* @param clazz Primitive class of the data type
* @return The reference class
*/
public static Class<?> getReference(Class<?> clazz)
{
DataType type = fromClass(clazz);
return type == null ? clazz : type.getReference();
}
/**
* Returns the primitive class array of the given class array
*
* @param classes Given class array
* @return The primitive class array
*/
public static Class<?>[] getPrimitive(Class<?>[] classes)
{
int length = classes == null ? 0 : classes.length;
Class<?>[] types = new Class<?>[length];
for (int index = 0; index < length; index++)
{
types[index] = getPrimitive(classes[index]);
}
return types;
}
/**
* Returns the primitive class array of the given object array
*
* @param objects Given object array
* @return The primitive class array
*/
public static Class<?>[] getPrimitive(Object[] objects)
{
int length = objects == null ? 0 : objects.length;
Class<?>[] types = new Class<?>[length];
for (int index = 0; index < length; index++)
{
types[index] = getPrimitive(objects[index].getClass());
}
return types;
}
/**
* Compares two class arrays on equivalence
*
* @param primary Primary class array
* @param secondary Class array which is compared to the primary array
* @return Whether these arrays are equal or not
*/
public static boolean compare(Class<?>[] primary, Class<?>[] secondary)
{
if (primary == null || secondary == null || primary.length != secondary.length)
{
return false;
}
for (int index = 0; index < primary.length; index++)
{
Class<?> primaryClass = primary[index];
Class<?> secondaryClass = secondary[index];
if (primaryClass.equals(secondaryClass) || primaryClass.isAssignableFrom(secondaryClass))
{
continue;
}
return false;
}
return true;
}
/**
* Returns the primitive class of this data type
*
* @return The primitive class
*/
public Class<?> getPrimitive()
{
return primitive;
}
/**
* Returns the reference class of this data type
*
* @return The reference class
*/
public Class<?> getReference()
{
return reference;
}
}
/**
* Represents an enumeration of all packet types that are featured in <b>Minecraft 1.7.10</b>
* <p>
* If this enumeration is no longer up-to-date, please let me know in my <a href="http://forums.bukkit.org/threads/lib-1-7-particleeffect-v1-4.154406">forum post</a>
* <p>
* This class is part of the <b>ReflectionUtils</b> and follows the same usage conditions
*
* @author DarkBlade12 (Edited by Thog)
* @since 1.0
*/
public enum PacketType
{
HANDSHAKING_IN_SET_PROTOCOL("PacketHandshakingInSetProtocol"),
LOGIN_IN_ENCRYPTION_BEGIN("PacketLoginInEncryptionBegin"),
LOGIN_IN_START("PacketLoginInStart"),
LOGIN_OUT_DISCONNECT("PacketLoginOutDisconnect"),
LOGIN_OUT_ENCRYPTION_BEGIN("PacketLoginOutEncryptionBegin"),
LOGIN_OUT_SUCCESS("PacketLoginOutSuccess"),
PLAY_IN_ABILITIES("PacketPlayInAbilities"),
PLAY_IN_ARM_ANIMATION("PacketPlayInArmAnimation"),
PLAY_IN_BLOCK_DIG("PacketPlayInBlockDig"),
PLAY_IN_BLOCK_PLACE("PacketPlayInBlockPlace"),
PLAY_IN_CHAT("PacketPlayInChat"),
PLAY_IN_CLIENT_COMMAND("PacketPlayInClientCommand"),
PLAY_IN_CLOSE_WINDOW("PacketPlayInCloseWindow"),
PLAY_IN_CUSTOM_PAYLOAD("PacketPlayInCustomPayload"),
PLAY_IN_ENCHANT_ITEM("PacketPlayInEnchantItem"),
PLAY_IN_ENTITY_ACTION("PacketPlayInEntityAction"),
PLAY_IN_FLYING("PacketPlayInFlying"),
PLAY_IN_HELD_ITEM_SLOT("PacketPlayInHeldItemSlot"),
PLAY_IN_KEEP_ALIVE("PacketPlayInKeepAlive"),
PLAY_IN_LOOK("PacketPlayInLook"),
PLAY_IN_POSITION("PacketPlayInPosition"),
PLAY_IN_POSITION_LOOK("PacketPlayInPositionLook"),
PLAY_IN_SET_CREATIVE_SLOT("PacketPlayInSetCreativeSlot "),
PLAY_IN_SETTINGS("PacketPlayInSettings"),
PLAY_IN_STEER_VEHICLE("PacketPlayInSteerVehicle"),
PLAY_IN_TAB_COMPLETE("PacketPlayInTabComplete"),
PLAY_IN_TRANSACTION("PacketPlayInTransaction"),
PLAY_IN_UPDATE_SIGN("PacketPlayInUpdateSign"),
PLAY_IN_USE_ENTITY("PacketPlayInUseEntity"),
PLAY_IN_WINDOW_CLICK("PacketPlayInWindowClick"),
PLAY_OUT_ABILITIES("PacketPlayOutAbilities"),
PLAY_OUT_ANIMATION("PacketPlayOutAnimation"),
PLAY_OUT_ATTACH_ENTITY("PacketPlayOutAttachEntity"),
PLAY_OUT_BED("PacketPlayOutBed"),
PLAY_OUT_BLOCK_ACTION("PacketPlayOutBlockAction"),
PLAY_OUT_BLOCK_BREAK_ANIMATION("PacketPlayOutBlockBreakAnimation"),
PLAY_OUT_BLOCK_CHANGE("PacketPlayOutBlockChange"),
PLAY_OUT_CHAT("PacketPlayOutChat"),
PLAY_OUT_CLOSE_WINDOW("PacketPlayOutCloseWindow"),
PLAY_OUT_COLLECT("PacketPlayOutCollect"),
PLAY_OUT_CRAFT_PROGRESS_BAR("PacketPlayOutCraftProgressBar"),
PLAY_OUT_CUSTOM_PAYLOAD("PacketPlayOutCustomPayload"),
PLAY_OUT_ENTITY("PacketPlayOutEntity"),
PLAY_OUT_ENTITY_DESTROY("PacketPlayOutEntityDestroy"),
PLAY_OUT_ENTITY_EFFECT("PacketPlayOutEntityEffect"),
PLAY_OUT_ENTITY_EQUIPMENT("PacketPlayOutEntityEquipment"),
PLAY_OUT_ENTITY_HEAD_ROTATION("PacketPlayOutEntityHeadRotation"),
PLAY_OUT_ENTITY_LOOK("PacketPlayOutEntityLook"),
PLAY_OUT_ENTITY_METADATA("PacketPlayOutEntityMetadata"),
PLAY_OUT_ENTITY_STATUS("PacketPlayOutEntityStatus"),
PLAY_OUT_ENTITY_TELEPORT("PacketPlayOutEntityTeleport"),
PLAY_OUT_ENTITY_VELOCITY("PacketPlayOutEntityVelocity"),
PLAY_OUT_EXPERIENCE("PacketPlayOutExperience"),
PLAY_OUT_EXPLOSION("PacketPlayOutExplosion"),
PLAY_OUT_GAME_STATE_CHANGE("PacketPlayOutGameStateChange"),
PLAY_OUT_HELD_ITEM_SLOT("PacketPlayOutHeldItemSlot"),
PLAY_OUT_KEEP_ALIVE("PacketPlayOutKeepAlive"),
PLAY_OUT_KICK_DISCONNECT("PacketPlayOutKickDisconnect"),
PLAY_OUT_LOGIN("PacketPlayOutLogin"),
PLAY_OUT_MAP("PacketPlayOutMap"),
PLAY_OUT_MAP_CHUNK("PacketPlayOutMapChunk"),
PLAY_OUT_MAP_CHUNK_BULK("PacketPlayOutMapChunkBulk"),
PLAY_OUT_MULTI_BLOCK_CHANGE("PacketPlayOutMultiBlockChange"),
PLAY_OUT_NAMED_ENTITY_SPAWN("PacketPlayOutNamedEntitySpawn"),
PLAY_OUT_NAMED_SOUND_EFFECT("PacketPlayOutNamedSoundEffect"),
PLAY_OUT_OPEN_SIGN_EDITOR("PacketPlayOutOpenSignEditor"),
PLAY_OUT_OPEN_WINDOW("PacketPlayOutOpenWindow"),
PLAY_OUT_PLAYER_INFO("PacketPlayOutPlayerInfo"),
PLAY_OUT_POSITION("PacketPlayOutPosition"),
PLAY_OUT_REL_ENTITY_MOVE("PacketPlayOutRelEntityMove"),
PLAY_OUT_REL_ENTITY_MOVE_LOOK("PacketPlayOutRelEntityMoveLook"),
PLAY_OUT_REMOVE_ENTITY_EFFECT("PacketPlayOutRemoveEntityEffect"),
PLAY_OUT_RESPAWN("PacketPlayOutRespawn"),
PLAY_OUT_SCOREBOARD_DISPLAY_OBJECTIVE("PacketPlayOutScoreboardDisplayObjective"),
PLAY_OUT_SCOREBOARD_OBJECTIVE("PacketPlayOutScoreboardObjective"),
PLAY_OUT_SCOREBOARD_SCORE("PacketPlayOutScoreboardScore"),
PLAY_OUT_SCOREBOARD_TEAM("PacketPlayOutScoreboardTeam"),
PLAY_OUT_SET_SLOT("PacketPlayOutSetSlot"),
PLAY_OUT_SPAWN_ENTITY("PacketPlayOutSpawnEntity"),
PLAY_OUT_SPAWN_ENTITY_EXPERIENCE_ORB("PacketPlayOutSpawnEntityExperienceOrb"),
PLAY_OUT_SPAWN_ENTITY_LIVING("PacketPlayOutSpawnEntityLiving"),
PLAY_OUT_SPAWN_ENTITY_PAINTING("PacketPlayOutSpawnEntityPainting"),
PLAY_OUT_SPAWN_ENTITY_WEATHER("PacketPlayOutSpawnEntityWeather"),
PLAY_OUT_SPAWN_POSITION("PacketPlayOutSpawnPosition"),
PLAY_OUT_STATISTIC("PacketPlayOutStatistic"),
PLAY_OUT_TAB_COMPLETE("PacketPlayOutTabComplete"),
PLAY_OUT_TILE_ENTITY_DATA("PacketPlayOutTileEntityData"),
PLAY_OUT_TRANSACTION("PacketPlayOutTransaction"),
PLAY_OUT_UPDATE_ATTRIBUTES("PacketPlayOutUpdateAttributes"),
PLAY_OUT_UPDATE_HEALTH("PacketPlayOutUpdateHealth"),
PLAY_OUT_UPDATE_SIGN("PacketPlayOutUpdateSign"),
PLAY_OUT_UPDATE_TIME("PacketPlayOutUpdateTime"),
PLAY_OUT_WINDOW_ITEMS("PacketPlayOutWindowItems"),
PLAY_OUT_WORLD_EVENT("PacketPlayOutWorldEvent"),
PLAY_OUT_WORLD_PARTICLES("PacketPlayOutWorldParticles"),
STATUS_IN_PING("PacketStatusInPing"),
STATUS_IN_START("PacketStatusInStart"),
STATUS_OUT_PONG("PacketStatusOutPong"),
STATUS_OUT_SERVER_INFO("PacketStatusOutServerInfo");
private final String name;
/**
* Construct a new packet type
*
* @param name Name of this packet
*/
PacketType(String name)
{
this.name = name;
}
}
}