content: /*
   * Latke - 一款以 JSON 为主的 Java Web 框架
   * Copyright (c) 2009-present, b3log.org
   *
   * Latke is licensed under Mulan PSL v2.
   * You can use this software according to the terms and conditions of the Mulan PSL v2.
   * You may obtain a copy of Mulan PSL v2 at:
   *         http://license.coscl.org.cn/MulanPSL2
   * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
   * See the Mulan PSL v2 for more details.
   */
  package org.b3log.latke.util;
  
  import java.util.Arrays;
  
  /**
   * Array utilities.
   *
   * @author <a href="http://88250.b3log.org">Liang Ding</a>
   * @version 1.0.0.0, Jun 20, 2013
   */
  public final class ArrayUtils {
  
      /**
       * Concatenates the specified arrays.
       *
       * @param <T>   the type of array element
       * @param first the specified first array
       * @param rest  the specified rest arrays
       * @return concatenated array
       */
      public static <T> T[] concatenate(final T[] first, final T[]... rest) {
          int totalLength = first.length;
  
          for (final T[] array : rest) {
              totalLength += array.length;
          }
  
          final T[] ret = Arrays.copyOf(first, totalLength);
          int offset = first.length;
  
          for (final T[] array : rest) {
              System.arraycopy(array, 0, ret, offset, array.length);
              offset += array.length;
          }
  
          return ret;
      }
  
      /**
       * Private constructor.
       */
      private ArrayUtils() {
      }
  }
  