get Serialized Lambda - Java Reflection

Java examples for Reflection:Lambda

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Description

get Serialized Lambda

Demo Code

/*/*from  w  ww.  j av  a2  s .co  m*/
 * Copyright 2015 Fizzed Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;
import java.lang.invoke.SerializedLambda;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class Main {
    static public SerializedLambda getSerializedLambda(Object function)
            throws Exception {
        if (function == null || !(function instanceof java.io.Serializable)) {
            throw new IllegalArgumentException();
        }

        for (Class<?> clazz = function.getClass(); clazz != null; clazz = clazz
                .getSuperclass()) {
            try {
                Method replaceMethod = clazz
                        .getDeclaredMethod("writeReplace");
                replaceMethod.setAccessible(true);
                Object serializedForm = replaceMethod.invoke(function);

                if (serializedForm instanceof SerializedLambda) {
                    return (SerializedLambda) serializedForm;
                }
            } catch (NoSuchMethodError e) {
                // fall through the loop and try the next class
            } catch (NoSuchMethodException | SecurityException
                    | IllegalAccessException | IllegalArgumentException
                    | InvocationTargetException t) {
                throw new RuntimeException(
                        "Error while extracting serialized lambda", t);
            }
        }

        throw new Exception("writeReplace method not found");
    }
}

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