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.net;
  
  import org.apache.cassandra.io.IVersionedSerializer;
  import org.apache.cassandra.io.UnversionedSerializer;
  import org.apache.cassandra.io.util.DataInputPlus;
  import org.apache.cassandra.io.util.DataOutputPlus;
  
  /**
   * Empty message payload - primarily used for responses.
   *
   * Prefer this singleton to writing one-off specialised classes.
   */
  public class NoPayload
  {
      public static final NoPayload noPayload = new NoPayload();
  
      private NoPayload() {}
  
      public static final IVersionedSerializer<NoPayload> serializer = new IVersionedSerializer<NoPayload>()
      {
          public void serialize(NoPayload noPayload, DataOutputPlus out, int version)
          {
              if (noPayload != NoPayload.noPayload)
                  throw new IllegalArgumentException();
          }
  
          public NoPayload deserialize(DataInputPlus in, int version)
          {
              return noPayload;
          }
  
          public long serializedSize(NoPayload noPayload, int version)
          {
              return 0;
          }
      };
      public static final UnversionedSerializer<NoPayload> unversionedSerializer = new UnversionedSerializer<NoPayload>()
      {
          public void serialize(NoPayload noPayload, DataOutputPlus out)
          {
              if (noPayload != NoPayload.noPayload)
                  throw new IllegalArgumentException();
          }
  
          public NoPayload deserialize(DataInputPlus in)
          {
              return noPayload;
          }
  
          public long serializedSize(NoPayload noPayload)
          {
              return 0;
          }
      };
  }
  