minecraft-src/net/minecraft/network/codec/StreamCodec.java

package net.minecraft.network.codec;

import com.google.common.base.Suppliers;
import com.mojang.datafixers.util.Function3;
import com.mojang.datafixers.util.Function4;
import com.mojang.datafixers.util.Function5;
import com.mojang.datafixers.util.Function6;
import com.mojang.datafixers.util.Function7;
import com.mojang.datafixers.util.Function8;
import io.netty.buffer.ByteBuf;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.function.UnaryOperator;

public interface StreamCodec<B, V> extends StreamDecoder<B, V>, StreamEncoder<B, V> {
	static <B, V> StreamCodec<B, V> of(StreamEncoder<B, V> encoder, StreamDecoder<B, V> decoder) {
		return new StreamCodec<B, V>() {
			@Override
			public V decode(B object) {
				return decoder.decode(object);
			}

			@Override
			public void encode(B object, V object2) {
				encoder.encode(object, object2);
			}
		};
	}

	static <B, V> StreamCodec<B, V> ofMember(StreamMemberEncoder<B, V> encoder, StreamDecoder<B, V> decoder) {
		return new StreamCodec<B, V>() {
			@Override
			public V decode(B object) {
				return decoder.decode(object);
			}

			@Override
			public void encode(B object, V object2) {
				encoder.encode(object2, object);
			}
		};
	}

	static <B, V> StreamCodec<B, V> unit(V expectedValue) {
		return new StreamCodec<B, V>() {
			@Override
			public V decode(B object) {
				return expectedValue;
			}

			@Override
			public void encode(B object, V object2) {
				if (!object2.equals(expectedValue)) {
					throw new IllegalStateException("Can't encode '" + object2 + "', expected '" + expectedValue + "'");
				}
			}
		};
	}

	default <O> StreamCodec<B, O> apply(StreamCodec.CodecOperation<B, V, O> operation) {
		return operation.apply(this);
	}

	default <O> StreamCodec<B, O> map(Function<? super V, ? extends O> factory, Function<? super O, ? extends V> getter) {
		return new StreamCodec<B, O>() {
			@Override
			public O decode(B object) {
				return (O)factory.apply(StreamCodec.this.decode(object));
			}

			@Override
			public void encode(B object, O object2) {
				StreamCodec.this.encode(object, (V)getter.apply(object2));
			}
		};
	}

	default <O extends ByteBuf> StreamCodec<O, V> mapStream(Function<O, ? extends B> bufferFactory) {
		return new StreamCodec<O, V>() {
			public V decode(O byteBuf) {
				B object = (B)bufferFactory.apply(byteBuf);
				return StreamCodec.this.decode(object);
			}

			public void encode(O byteBuf, V object) {
				B object2 = (B)bufferFactory.apply(byteBuf);
				StreamCodec.this.encode(object2, object);
			}
		};
	}

	default <U> StreamCodec<B, U> dispatch(
		Function<? super U, ? extends V> keyGetter, Function<? super V, ? extends StreamCodec<? super B, ? extends U>> codecGetter
	) {
		return new StreamCodec<B, U>() {
			@Override
			public U decode(B object) {
				V object2 = StreamCodec.this.decode(object);
				StreamCodec<? super B, ? extends U> streamCodec = (StreamCodec<? super B, ? extends U>)codecGetter.apply(object2);
				return (U)streamCodec.decode(object);
			}

			@Override
			public void encode(B object, U object2) {
				V object3 = (V)keyGetter.apply(object2);
				StreamCodec<B, U> streamCodec = (StreamCodec<B, U>)codecGetter.apply(object3);
				StreamCodec.this.encode(object, object3);
				streamCodec.encode(object, object2);
			}
		};
	}

	static <B, C, T1> StreamCodec<B, C> composite(StreamCodec<? super B, T1> codec, Function<C, T1> getter, Function<T1, C> factory) {
		return new StreamCodec<B, C>() {
			@Override
			public C decode(B object) {
				T1 object2 = codec.decode(object);
				return (C)factory.apply(object2);
			}

			@Override
			public void encode(B object, C object2) {
				codec.encode(object, (T1)getter.apply(object2));
			}
		};
	}

	static <B, C, T1, T2> StreamCodec<B, C> composite(
		StreamCodec<? super B, T1> codec1, Function<C, T1> getter1, StreamCodec<? super B, T2> codec2, Function<C, T2> getter2, BiFunction<T1, T2, C> factory
	) {
		return new StreamCodec<B, C>() {
			@Override
			public C decode(B object) {
				T1 object2 = codec1.decode(object);
				T2 object3 = codec2.decode(object);
				return (C)factory.apply(object2, object3);
			}

			@Override
			public void encode(B object, C object2) {
				codec1.encode(object, (T1)getter1.apply(object2));
				codec2.encode(object, (T2)getter2.apply(object2));
			}
		};
	}

	static <B, C, T1, T2, T3> StreamCodec<B, C> composite(
		StreamCodec<? super B, T1> codec1,
		Function<C, T1> getter1,
		StreamCodec<? super B, T2> codec2,
		Function<C, T2> getter2,
		StreamCodec<? super B, T3> codec3,
		Function<C, T3> getter3,
		Function3<T1, T2, T3, C> factory
	) {
		return new StreamCodec<B, C>() {
			@Override
			public C decode(B object) {
				T1 object2 = codec1.decode(object);
				T2 object3 = codec2.decode(object);
				T3 object4 = codec3.decode(object);
				return factory.apply(object2, object3, object4);
			}

			@Override
			public void encode(B object, C object2) {
				codec1.encode(object, (T1)getter1.apply(object2));
				codec2.encode(object, (T2)getter2.apply(object2));
				codec3.encode(object, (T3)getter3.apply(object2));
			}
		};
	}

	static <B, C, T1, T2, T3, T4> StreamCodec<B, C> composite(
		StreamCodec<? super B, T1> codec1,
		Function<C, T1> getter1,
		StreamCodec<? super B, T2> codec2,
		Function<C, T2> getter2,
		StreamCodec<? super B, T3> codec3,
		Function<C, T3> getter3,
		StreamCodec<? super B, T4> codec4,
		Function<C, T4> getter4,
		Function4<T1, T2, T3, T4, C> factory
	) {
		return new StreamCodec<B, C>() {
			@Override
			public C decode(B object) {
				T1 object2 = codec1.decode(object);
				T2 object3 = codec2.decode(object);
				T3 object4 = codec3.decode(object);
				T4 object5 = codec4.decode(object);
				return factory.apply(object2, object3, object4, object5);
			}

			@Override
			public void encode(B object, C object2) {
				codec1.encode(object, (T1)getter1.apply(object2));
				codec2.encode(object, (T2)getter2.apply(object2));
				codec3.encode(object, (T3)getter3.apply(object2));
				codec4.encode(object, (T4)getter4.apply(object2));
			}
		};
	}

	static <B, C, T1, T2, T3, T4, T5> StreamCodec<B, C> composite(
		StreamCodec<? super B, T1> codec1,
		Function<C, T1> getter1,
		StreamCodec<? super B, T2> codec2,
		Function<C, T2> getter2,
		StreamCodec<? super B, T3> codec3,
		Function<C, T3> getter3,
		StreamCodec<? super B, T4> codec4,
		Function<C, T4> getter4,
		StreamCodec<? super B, T5> codec5,
		Function<C, T5> getter5,
		Function5<T1, T2, T3, T4, T5, C> factory
	) {
		return new StreamCodec<B, C>() {
			@Override
			public C decode(B object) {
				T1 object2 = codec1.decode(object);
				T2 object3 = codec2.decode(object);
				T3 object4 = codec3.decode(object);
				T4 object5 = codec4.decode(object);
				T5 object6 = codec5.decode(object);
				return factory.apply(object2, object3, object4, object5, object6);
			}

			@Override
			public void encode(B object, C object2) {
				codec1.encode(object, (T1)getter1.apply(object2));
				codec2.encode(object, (T2)getter2.apply(object2));
				codec3.encode(object, (T3)getter3.apply(object2));
				codec4.encode(object, (T4)getter4.apply(object2));
				codec5.encode(object, (T5)getter5.apply(object2));
			}
		};
	}

	static <B, C, T1, T2, T3, T4, T5, T6> StreamCodec<B, C> composite(
		StreamCodec<? super B, T1> codec1,
		Function<C, T1> getter1,
		StreamCodec<? super B, T2> codec2,
		Function<C, T2> getter2,
		StreamCodec<? super B, T3> codec3,
		Function<C, T3> getter3,
		StreamCodec<? super B, T4> codec4,
		Function<C, T4> getter4,
		StreamCodec<? super B, T5> codec5,
		Function<C, T5> getter5,
		StreamCodec<? super B, T6> codec6,
		Function<C, T6> getter6,
		Function6<T1, T2, T3, T4, T5, T6, C> factory
	) {
		return new StreamCodec<B, C>() {
			@Override
			public C decode(B object) {
				T1 object2 = codec1.decode(object);
				T2 object3 = codec2.decode(object);
				T3 object4 = codec3.decode(object);
				T4 object5 = codec4.decode(object);
				T5 object6 = codec5.decode(object);
				T6 object7 = codec6.decode(object);
				return factory.apply(object2, object3, object4, object5, object6, object7);
			}

			@Override
			public void encode(B object, C object2) {
				codec1.encode(object, (T1)getter1.apply(object2));
				codec2.encode(object, (T2)getter2.apply(object2));
				codec3.encode(object, (T3)getter3.apply(object2));
				codec4.encode(object, (T4)getter4.apply(object2));
				codec5.encode(object, (T5)getter5.apply(object2));
				codec6.encode(object, (T6)getter6.apply(object2));
			}
		};
	}

	static <B, C, T1, T2, T3, T4, T5, T6, T7> StreamCodec<B, C> composite(
		StreamCodec<? super B, T1> streamCodec,
		Function<C, T1> function,
		StreamCodec<? super B, T2> streamCodec2,
		Function<C, T2> function2,
		StreamCodec<? super B, T3> streamCodec3,
		Function<C, T3> function3,
		StreamCodec<? super B, T4> streamCodec4,
		Function<C, T4> function4,
		StreamCodec<? super B, T5> streamCodec5,
		Function<C, T5> function5,
		StreamCodec<? super B, T6> streamCodec6,
		Function<C, T6> function6,
		StreamCodec<? super B, T7> streamCodec7,
		Function<C, T7> function7,
		Function7<T1, T2, T3, T4, T5, T6, T7, C> function72
	) {
		return new StreamCodec<B, C>() {
			@Override
			public C decode(B object) {
				T1 object2 = streamCodec.decode(object);
				T2 object3 = streamCodec2.decode(object);
				T3 object4 = streamCodec3.decode(object);
				T4 object5 = streamCodec4.decode(object);
				T5 object6 = streamCodec5.decode(object);
				T6 object7 = streamCodec6.decode(object);
				T7 object8 = streamCodec7.decode(object);
				return function72.apply(object2, object3, object4, object5, object6, object7, object8);
			}

			@Override
			public void encode(B object, C object2) {
				streamCodec.encode(object, (T1)function.apply(object2));
				streamCodec2.encode(object, (T2)function2.apply(object2));
				streamCodec3.encode(object, (T3)function3.apply(object2));
				streamCodec4.encode(object, (T4)function4.apply(object2));
				streamCodec5.encode(object, (T5)function5.apply(object2));
				streamCodec6.encode(object, (T6)function6.apply(object2));
				streamCodec7.encode(object, (T7)function7.apply(object2));
			}
		};
	}

	static <B, C, T1, T2, T3, T4, T5, T6, T7, T8> StreamCodec<B, C> composite(
		StreamCodec<? super B, T1> streamCodec,
		Function<C, T1> function,
		StreamCodec<? super B, T2> streamCodec2,
		Function<C, T2> function2,
		StreamCodec<? super B, T3> streamCodec3,
		Function<C, T3> function3,
		StreamCodec<? super B, T4> streamCodec4,
		Function<C, T4> function4,
		StreamCodec<? super B, T5> streamCodec5,
		Function<C, T5> function5,
		StreamCodec<? super B, T6> streamCodec6,
		Function<C, T6> function6,
		StreamCodec<? super B, T7> streamCodec7,
		Function<C, T7> function7,
		StreamCodec<? super B, T8> streamCodec8,
		Function<C, T8> function8,
		Function8<T1, T2, T3, T4, T5, T6, T7, T8, C> function82
	) {
		return new StreamCodec<B, C>() {
			@Override
			public C decode(B object) {
				T1 object2 = streamCodec.decode(object);
				T2 object3 = streamCodec2.decode(object);
				T3 object4 = streamCodec3.decode(object);
				T4 object5 = streamCodec4.decode(object);
				T5 object6 = streamCodec5.decode(object);
				T6 object7 = streamCodec6.decode(object);
				T7 object8 = streamCodec7.decode(object);
				T8 object9 = streamCodec8.decode(object);
				return function82.apply(object2, object3, object4, object5, object6, object7, object8, object9);
			}

			@Override
			public void encode(B object, C object2) {
				streamCodec.encode(object, (T1)function.apply(object2));
				streamCodec2.encode(object, (T2)function2.apply(object2));
				streamCodec3.encode(object, (T3)function3.apply(object2));
				streamCodec4.encode(object, (T4)function4.apply(object2));
				streamCodec5.encode(object, (T5)function5.apply(object2));
				streamCodec6.encode(object, (T6)function6.apply(object2));
				streamCodec7.encode(object, (T7)function7.apply(object2));
				streamCodec8.encode(object, (T8)function8.apply(object2));
			}
		};
	}

	static <B, T> StreamCodec<B, T> recursive(UnaryOperator<StreamCodec<B, T>> modifier) {
		return new StreamCodec<B, T>() {
			private final Supplier<StreamCodec<B, T>> inner = Suppliers.memoize(() -> (StreamCodec<B, T>)modifier.apply(this));

			@Override
			public T decode(B object) {
				return (T)((StreamCodec)this.inner.get()).decode(object);
			}

			@Override
			public void encode(B object, T object2) {
				((StreamCodec)this.inner.get()).encode(object, (V)object2);
			}
		};
	}

	default <S extends B> StreamCodec<S, V> cast() {
		return this;
	}

	@FunctionalInterface
	public interface CodecOperation<B, S, T> {
		StreamCodec<B, T> apply(StreamCodec<B, S> streamCodec);
	}
}