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package cn.majingjing.http.client.util;

import javax.activation.UnsupportedDataTypeException;
import java.io.*;
import java.util.Objects;

/**
 * @author MaMarion
 * @date 2021/2/23
 */
public class ObjectUtils {

    private ObjectUtils() {
    }

    public static  T getValueOrDefault(Object val, Object defaultVal) {
        return (T) (Objects.isNull(val) ? defaultVal : val);
    }

    public static boolean isNull(Object obj){
        return obj == null;
    }

    public static boolean isNotNull(Object obj){
        return obj != null;
    }



    /**
     * Clone object
     * @param source object to be cloned
     * @param  the object type
     * @return  the target object of cloned
     * @throws IOException maybe throw IOException
     * @throws ClassNotFoundException maybe throw ClassNotFoundException
     */
    @SuppressWarnings("unckecked")
    public static  T clone(T source) throws IOException, ClassNotFoundException {
        T result;
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(bos);
        oos.writeObject(source);
        oos.flush();
        try (ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(bos.toByteArray()))) {
            result = (T) ois.readObject();
        }
        return result;
    }

    /**
     * Serialize objects into byte []
     * @param obj object to be serialized
     * @return byte array
     * @throws IOException maybe throw IOException
     */
    public static byte[] serialize(Object obj) throws IOException {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        try (ObjectOutputStream oos = new ObjectOutputStream(bos)) {
            oos.writeObject(obj);
            oos.flush();
        }
        return bos.toByteArray();
    }

    /**
     * Deserialize byte [] into object
     *
     * @param bytes byte array
     * @param    de-serialized object type
     * @return object with declare type T
     * @throws UnsupportedDataTypeException if deserialize error will be throw UnsupportedDataTypeException
     */
    public static  T deserialize(byte[] bytes) throws UnsupportedDataTypeException {
        try {
            try (ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(bytes))) {
                return (T) ois.readObject();
            }
        } catch (IOException | ClassNotFoundException e) {
            throw new UnsupportedDataTypeException(e.getMessage());
        }
    }

}