content: /*
   * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
   *
   * 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.alibaba.otter.node.etl.common.io.signature;
  
  /**
   * 提供基于checksum的签名方式
   * 
   * @author jianghang 2011-10-9 下午05:43:04
   * @version 4.0.0
   */
  public class ChecksumUtils {
  
      public static String checksum(byte[] bytes) {
          int sum = Crc32C.maskedCrc32c(bytes, 0, bytes.length);
          return Integer.toString(sum);
      }
  
      public static String checksum(byte[] bytes, int offset, int length) {
          int sum = Crc32C.maskedCrc32c(bytes, offset, length);
          return Integer.toString(sum);
      }
  
  }
  