DtoByteMarshaller.java

/*
 * Copyright 2014-2016 CyberVision, 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 org.kaaproject.kaa.common.dto;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

public class DtoByteMarshaller {

  /**
   * The Constant LOG.
   */
  private static final Logger LOG = LoggerFactory
      .getLogger(DtoByteMarshaller.class);

  private DtoByteMarshaller() {
  }

  /**
   * Converts an object ot byte array.
   *
   * @param object object
   * @param <T>    generic type
   * @return       byte array
   */
  public static <T> byte[] toBytes(T object) {
    ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
    try {
      ObjectOutputStream out = new ObjectOutputStream(byteStream);
      out.writeObject(object);
    } catch (IOException ex) {
      LOG.error("Can't convert object to bytes.", ex);
    }
    return byteStream.toByteArray();
  }

  /**
   * Converts a byte array to an object.
   *
   * @param bytes byte array
   */
  @SuppressWarnings("unchecked")
  public static <T> T fromBytes(byte[] bytes) {
    ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
    T object = null;
    try {
      ObjectInputStream objectInputStream = new ObjectInputStream(inputStream);
      object = (T) objectInputStream.readObject();
    } catch (Exception ex) {
      LOG.error("Can't convert bytes to object.", ex);
    }
    return object;
  }

}