/*
 * Copyright (C) 2024 The Android Open Source Project
 *
 * 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.android.ondevicepersonalization.internal.util;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

/**
 * Util class to handle different object conversion from/to byte array.
 *
 * @hide
 */
public class ByteArrayUtil {
    /** serialize an object to byte array. The object need implement Serializable. */
    public static byte[] serializeObject(Object input) {
        try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
                ObjectOutputStream out = new ObjectOutputStream(bos)) {
            out.writeObject(input);
            return bos.toByteArray();
        } catch (IOException e) {
            throw new IllegalArgumentException("Failed to serialize inputData field", e);
        }
    }

    /** Deserialize a byte array to Object. The object need implement Serializable. */
    public static Object deserializeObject(byte[] bytes) {
        try (ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
                ObjectInputStream in = new ObjectInputStream(bis)) {
            return in.readObject();
        } catch (IOException | ClassNotFoundException e) {
            throw new IllegalArgumentException("Failed to deserialize inputData field", e);
        }
    }
}