/**
* Retrieves a read/write structure for collections of chunk positions.
*
* <p>This modifier will automatically marshall between the visible ProtocolLib ChunkPosition and
* the internal Minecraft ChunkPosition.
*
* @return A modifier for ChunkPosition list fields.
*/
public StructureModifier<List<ChunkPosition>> getPositionCollectionModifier() {
// Convert to and from the ProtocolLib wrapper
return structureModifier.withType(
Collection.class,
BukkitConverters.getListConverter(
MinecraftReflection.getChunkPositionClass(), ChunkPosition.getConverter()));
}
private void readObject(ObjectInputStream input) throws ClassNotFoundException, IOException {
// Default deserialization
input.defaultReadObject();
// Get structure modifier
structureModifier = StructureCache.getStructure(id);
// Don't read NULL packets
if (input.readBoolean()) {
// Create a default instance of the packet
handle = StructureCache.newPacket(id);
// Call the read method
try {
getMethodLazily(readMethods, handle.getClass(), "read", DataInputStream.class)
.invoke(handle, new DataInputStream(input));
} catch (IllegalArgumentException e) {
throw new IOException("Minecraft packet doesn't support DataInputStream", e);
} catch (IllegalAccessException e) {
throw new RuntimeException("Insufficient security privileges.", e);
} catch (InvocationTargetException e) {
throw new IOException("Could not deserialize Minecraft packet.", e);
}
// And we're done
structureModifier = structureModifier.withTarget(handle);
}
}
/**
* Retrieves a read/write structure for collections of watchable objects.
*
* <p>This modifier will automatically marshall between the visible WrappedWatchableObject and the
* internal Minecraft WatchableObject.
*
* @return A modifier for watchable object list fields.
*/
public StructureModifier<List<WrappedWatchableObject>> getWatchableCollectionModifier() {
// Convert to and from the ProtocolLib wrapper
return structureModifier.withType(
Collection.class,
BukkitConverters.getListConverter(
MinecraftReflection.getWatchableObjectClass(),
BukkitConverters.getWatchableObjectConverter()));
}
/**
* Retrieve a structure modifier that automatically marshalls between NBT wrappers and their NMS
* counterpart.
*
* @param stack - the stack that will store the NBT compound.
* @return The structure modifier.
*/
private static StructureModifier<NbtBase<?>> getStackModifier(ItemStack stack) {
Object nmsStack = MinecraftReflection.getMinecraftItemStack(stack);
if (itemStackModifier == null) {
itemStackModifier = new StructureModifier<Object>(nmsStack.getClass(), Object.class, false);
}
// Use the first and best NBT tag
return itemStackModifier
.withTarget(nmsStack)
.withType(MinecraftReflection.getNBTBaseClass(), BukkitConverters.getNbtConverter());
}
@Override
public void onPacketSending(PacketEvent event) {
if (!event.isCancelled() && event.getPacketID() == Packets.Server.NAMED_ENTITY_SPAWN) {
PacketContainer packet = event.getPacket();
StructureModifier<String> text = packet.getSpecificModifier(String.class);
try {
String tag = text.read(0);
Player observer = event.getPlayer();
Entity watched = packet.getEntityModifier(observer.getWorld()).read(0);
if (watched instanceof Player) {
ReceiveNameTagEvent nameTagEvent =
new ReceiveNameTagEvent(event.getPlayer(), (Player) watched, tag);
pluginManager.callEvent(nameTagEvent);
if (nameTagEvent.isModified()) {
// Trim excess
tag = nameTagEvent.getTrimmedTag();
// Uh, ok.
if (tag == null) tag = "";
text.write(0, tag);
}
} else {
// Might as well notify about this
logger.log(
Level.WARNING,
"Cannot find entity id " + packet.getSpecificModifier(int.class).read(0));
}
} catch (FieldAccessException e) {
logger.log(Level.SEVERE, "Cannot read field.", e);
}
}
}
/**
* Retrieves a read/write structure for arrays of ItemStacks.
*
* <p>This modifier will automatically marshall between the Bukkit ItemStack and the internal
* Minecraft ItemStack.
*
* @return A modifier for ItemStack array fields.
*/
public StructureModifier<ItemStack[]> getItemArrayModifier() {
final EquivalentConverter<ItemStack> stackConverter = BukkitConverters.getItemStackConverter();
// Convert to and from the Bukkit wrapper
return structureModifier.<ItemStack[]>withType(
MinecraftReflection.getItemStackArrayClass(),
BukkitConverters.getIgnoreNull(
new EquivalentConverter<ItemStack[]>() {
public Object getGeneric(Class<?> genericType, ItemStack[] specific) {
Class<?> nmsStack = MinecraftReflection.getItemStackClass();
Object[] result = (Object[]) Array.newInstance(nmsStack, specific.length);
// Unwrap every item
for (int i = 0; i < result.length; i++) {
result[i] = stackConverter.getGeneric(nmsStack, specific[i]);
}
return result;
}
@Override
public ItemStack[] getSpecific(Object generic) {
Object[] input = (Object[]) generic;
ItemStack[] result = new ItemStack[input.length];
// Add the wrapper
for (int i = 0; i < result.length; i++) {
result[i] = stackConverter.getSpecific(input[i]);
}
return result;
}
@Override
public Class<ItemStack[]> getSpecificType() {
return ItemStack[].class;
}
}));
}
/**
* Retrieves a read/write structure for every short field.
*
* @return A modifier for every short field.
*/
public StructureModifier<Short> getShorts() {
return structureModifier.withType(short.class);
}
/**
* Retrieves a read/write structure for every integer field.
*
* @return A modifier for every integer field.
*/
public StructureModifier<Integer> getIntegers() {
return structureModifier.withType(int.class);
}
/**
* Retrieves a read/write structure for NBT classes.
*
* @return A modifier for NBT classes.
*/
public StructureModifier<NbtBase<?>> getNbtModifier() {
// Allow access to the NBT class in packet 130
return structureModifier.withType(
MinecraftReflection.getNBTBaseClass(), BukkitConverters.getNbtConverter());
}
/**
* Retrieves a read/write structure for chunk positions.
*
* @return A modifier for a ChunkPosition.
*/
public StructureModifier<ChunkPosition> getPositionModifier() {
// Convert to and from the Bukkit wrapper
return structureModifier.withType(
MinecraftReflection.getChunkPositionClass(), ChunkPosition.getConverter());
}
/**
* Retrieves a read/write structure for entity objects.
*
* <p>Note that entities are transmitted by integer ID, and the type may not be enough to
* distinguish between entities and other values. Thus, this structure modifier MAY return null or
* invalid entities for certain fields. Using the correct index is essential.
*
* @return A modifier entity types.
*/
public StructureModifier<Entity> getEntityModifier(World world) {
// Convert to and from the Bukkit wrapper
return structureModifier.<Entity>withType(
int.class, BukkitConverters.getEntityConverter(world));
}
/**
* Retrieves a read/write structure for data watchers.
*
* @return A modifier for data watchers.
*/
public StructureModifier<WrappedDataWatcher> getDataWatcherModifier() {
// Convert to and from the Bukkit wrapper
return structureModifier.<WrappedDataWatcher>withType(
MinecraftReflection.getDataWatcherClass(), BukkitConverters.getDataWatcherConverter());
}
/**
* Retrieves a read/write structure for every float field.
*
* @return A modifier for every float field.
*/
public StructureModifier<Float> getFloat() {
return structureModifier.withType(float.class);
}
/**
* Retrieves a read/write structure for ItemStack.
*
* <p>This modifier will automatically marshall between the Bukkit ItemStack and the internal
* Minecraft ItemStack.
*
* @return A modifier for ItemStack fields.
*/
public StructureModifier<ItemStack> getItemModifier() {
// Convert to and from the Bukkit wrapper
return structureModifier.<ItemStack>withType(
MinecraftReflection.getItemStackClass(), BukkitConverters.getItemStackConverter());
}
/**
* Retrieves a read/write structure for every byte array field.
*
* @return A modifier for every byte array field.
*/
public StructureModifier<byte[]> getByteArrays() {
return structureModifier.withType(byte[].class);
}
/**
* Retrieves a read/write structure for every field with the given type.
*
* @param primitiveType - the type to find.
* @return A modifier for this specific type.
*/
public <T> StructureModifier<T> getSpecificModifier(Class<T> primitiveType) {
return structureModifier.withType(primitiveType);
}
/**
* Retrieves a read/write structure for every String array field.
*
* @return A modifier for every String array field.
*/
public StructureModifier<String[]> getStringArrays() {
return structureModifier.withType(String[].class);
}
/**
* Retrieves a read/write structure for every String field.
*
* @return A modifier for every String field.
*/
public StructureModifier<String> getStrings() {
return structureModifier.withType(String.class);
}
/**
* Retrieves a read/write structure for every double field.
*
* @return A modifier for every double field.
*/
public StructureModifier<Double> getDoubles() {
return structureModifier.withType(double.class);
}
/**
* Retrieves a read/write structure for every byte field.
*
* @return A modifier for every byte field.
*/
public StructureModifier<Byte> getBytes() {
return structureModifier.withType(byte.class);
}
/**
* Retrieves a read/write structure for the world type enum.
*
* <p>This modifier will automatically marshall between the Bukkit world type and the internal
* Minecraft world type.
*
* @return A modifier for world type fields.
*/
public StructureModifier<WorldType> getWorldTypeModifier() {
// Convert to and from the Bukkit wrapper
return structureModifier.<WorldType>withType(
MinecraftReflection.getWorldTypeClass(), BukkitConverters.getWorldTypeConverter());
}
/**
* Retrieves a read/write structure for every int array field.
*
* @return A modifier for every int array field.
*/
public StructureModifier<int[]> getIntegerArrays() {
return structureModifier.withType(int[].class);
}
/**
* Retrieves a read/write structure for every long field.
*
* @return A modifier for every long field.
*/
public StructureModifier<Long> getLongs() {
return structureModifier.withType(long.class);
}