com.esotericsoftware.kryo.serializers.ClosureSerializer Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of kryo-slf4j-shaded Show documentation
Fork of Esoteric Software's Kryo built by Nathan Sweet that replaces Minlog with slf4j as the logging facade. This contains the shaded reflectasm jar to prevent conflicts with other versions of asm.
The newest version!
/* Copyright (c) 2008, Nathan Sweet
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
 * conditions are met:
 * 
 * - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
 * disclaimer in the documentation and/or other materials provided with the distribution.
 * - Neither the name of Esoteric Software nor the names of its contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */

package com.esotericsoftware.kryo.serializers;

import java.lang.reflect.Method;

import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryo.Serializer;
import com.esotericsoftware.kryo.io.Input;
import com.esotericsoftware.kryo.io.Output;

/** Serializer for Java8 closures. To serialize closures, use:
 * 
 * 
 * kryo.register(java.lang.invoke.SerializedLambda.class);

 * kryo.register(Closure.class, new ClosureSerializer());
 * @author Roman Levenstein  */
public class ClosureSerializer extends Serializer {

	private static Method readResolve;
	private static Class serializedLambda;
	static {
		try {
			serializedLambda = Class.forName("java.lang.invoke.SerializedLambda");
			readResolve = serializedLambda.getDeclaredMethod("readResolve");
			readResolve.setAccessible(true);
		} catch (Exception e) {
			throw new RuntimeException("Could not obtain SerializedLambda or its methods via reflection", e);
		}
	}

	public ClosureSerializer () {
	}

	public void write (Kryo kryo, Output output, Object object) {
		try {
			Class type = object.getClass();
			Method writeReplace = type.getDeclaredMethod("writeReplace");
			writeReplace.setAccessible(true);
			Object replacement = writeReplace.invoke(object);
			if (serializedLambda.isInstance(replacement)) {
				// Serialize the representation of this lambda
				kryo.writeObject(output, replacement);
			} else
				throw new RuntimeException("Could not serialize lambda");
		} catch (Exception e) {
			throw new RuntimeException("Could not serialize lambda", e);
		}
	}

	public Object read (Kryo kryo, Input input, Class type) {
		try {
			Object object = kryo.readObject(input, serializedLambda);
			return readResolve.invoke(object);
		} catch (Exception e) {
			throw new RuntimeException("Could not serialize lambda", e);
		}
	}

	public Object copy (Kryo kryo, Object original) {
		try {
			Class type = original.getClass();
			Method writeReplace = type.getDeclaredMethod("writeReplace");
			writeReplace.setAccessible(true);
			Object replacement = writeReplace.invoke(original);
			if (serializedLambda.isInstance(replacement)) {
				return readResolve.invoke(replacement);
			} else
				throw new RuntimeException("Could not serialize lambda");
		} catch (Exception e) {
			throw new RuntimeException("Could not serialize lambda", e);
		}
	}
}