content: /**
   * Copyright (C) 2008 Happy Fish / YuQing
   * <p>
   * FastDFS Java Client may be copied only under the terms of the GNU Lesser
   * General Public License (LGPL).
   * Please visit the FastDFS Home Page http://www.csource.org/ for more detail.
   */
  
  package org.zeus.common.fastdfs;
  
  import java.io.IOException;
  import java.lang.reflect.Array;
  
  /**
   * C struct body decoder
   *
   * @author Happy Fish / YuQing
   * @version Version 1.17
   */
  public class ProtoStructDecoder<T extends StructBase> {
    /**
     * Constructor
     */
    public ProtoStructDecoder() {
    }
  
    /**
     * decode byte buffer
     */
    public T[] decode(byte[] bs, Class<T> clazz, int fieldsTotalSize) throws Exception {
      if (bs.length % fieldsTotalSize != 0) {
        throw new IOException("byte array length: " + bs.length + " is invalid!");
      }
  
      int count = bs.length / fieldsTotalSize;
      int offset;
      T[] results = (T[]) Array.newInstance(clazz, count);
  
      offset = 0;
      for (int i = 0; i < results.length; i++) {
        results[i] = clazz.newInstance();
        results[i].setFields(bs, offset);
        offset += fieldsTotalSize;
      }
  
      return results;
    }
  }
  