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package cn.gitlab.virtualcry.reactor.bus.util;

import reactor.util.annotation.Nullable;

import java.io.*;

/**
 * Static utilities for serialization and deserialization.
 *
 * @author VirtualCry
 */
public class SerializationUtils {

    /**
     * Serialize the given object to a byte array.
     * @param object the object to serialize
     * @return an array of bytes representing the object in a portable fashion
     */
    @Nullable
    public static byte[] serialize(@Nullable Object object) {
        if (object == null) {
            return null;
        }
        ByteArrayOutputStream baos = new ByteArrayOutputStream(1024);
        try {
            ObjectOutputStream oos = new ObjectOutputStream(baos);
            oos.writeObject(object);
            oos.flush();
        }
        catch (IOException ex) {
            throw new IllegalArgumentException("Failed to serialize object of type: " + object.getClass(), ex);
        }
        return baos.toByteArray();
    }

    /**
     * Deserialize the byte array into an object.
     * @param bytes a serialized object
     * @return the result of deserializing the bytes
     */
    @Nullable
    public static Object deserialize(@Nullable byte[] bytes) {
        if (bytes == null) {
            return null;
        }
        try {
            ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(bytes));
            return ois.readObject();
        }
        catch (IOException ex) {
            throw new IllegalArgumentException("Failed to deserialize object", ex);
        }
        catch (ClassNotFoundException ex) {
            throw new IllegalStateException("Failed to deserialize object type", ex);
        }
    }

}