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zuul-core

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/*
 * Copyright 2013 Netflix, 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.netflix.zuul.util;

import java.io.*;

/**
 * Deep copy of an Object. The Object must be Serializable
 * @author Mikey Cohen
 * Date: 1/31/12
 * Time: 11:54 AM
 */
public class DeepCopy {
    /**
     * Returns a copy of the object, or null if the object cannot
     * be serialized.
     * @param orig an Object value
     * @return a deep copy of that Object
     * @exception NotSerializableException if an error occurs
     */
    public static Object copy(Object orig) throws NotSerializableException {
        Object obj = null;
        try {
            // Write the object out to a byte array
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            ObjectOutputStream out = new ObjectOutputStream(bos);
            out.writeObject(orig);
            out.flush();
            out.close();

            // Make an input stream from the byte array and read
            // a copy of the object back in.
            ObjectInputStream in = new ObjectInputStream(
                    new ByteArrayInputStream(bos.toByteArray()));
            obj = in.readObject();
        } catch (NotSerializableException e) {
            throw e;
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException cnfe) {
            cnfe.printStackTrace();
        }
        return obj;
    }
}