content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.apache.cassandra.io.util;
  
  import java.util.zip.Checksum;
  
  public interface Checksumed
  {
      Checksum checksum();
  
      default long getAndResetChecksum()
      {
          Checksum c = checksum();
          long v = c.getValue();
          c.reset();
          return v;
      }
  
      default int getValue32()
      {
          long v = checksum().getValue();
          if (Long.numberOfLeadingZeros(v) < 32)
              throw new IllegalStateException("Checksum is larger than 32 bytes!");
          return (int) v;
      }
  
      default int getValue32AndResetChecksum()
      {
          Checksum c = checksum();
          long v = c.getValue();
          if (Long.numberOfLeadingZeros(v) < 32)
              throw new IllegalStateException("Checksum is larger than 32 bytes!");
          c.reset();
          return (int) v;
      }
  
      default void resetChecksum()
      {
          checksum().reset();
      }
  }
  