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.tcm.extensions;
  
  import java.io.IOException;
  import java.util.Objects;
  
  import org.apache.cassandra.io.util.DataInputPlus;
  import org.apache.cassandra.io.util.DataOutputPlus;
  import org.apache.cassandra.tcm.Epoch;
  import org.apache.cassandra.tcm.serialization.Version;
  
  public abstract class AbstractExtensionValue<V> implements ExtensionValue<V>
  {
      private Epoch lastModified = Epoch.EMPTY;
      private V value = null;
  
      @Override
      public V withLastModified(Epoch lastModified)
      {
          this.lastModified = lastModified;
          return (V)this;
      }
  
      public Epoch lastModified()
      {
          return lastModified;
      }
  
      @Override
      public void setValue(V value)
      {
          this.value = value;
      }
  
      @Override
      public V getValue()
      {
          return value;
      }
  
      @Override
      public boolean equals(Object o)
      {
          if (this == o) return true;
          if (!(o instanceof AbstractExtensionValue)) return false;
          AbstractExtensionValue<?> that = (AbstractExtensionValue<?>) o;
          return Objects.equals(lastModified, that.lastModified) && Objects.equals(value, that.value);
      }
  
      @Override
      public int hashCode()
      {
          return Objects.hash(lastModified, value);
      }
  
      public void serialize(DataOutputPlus out, Version version) throws IOException
      {
          Epoch.serializer.serialize(lastModified(), out, version);
          serializeInternal(out, version);
  
      }
      abstract void serializeInternal(DataOutputPlus out, Version version) throws IOException;
  
      public void deserialize(DataInputPlus in, Version v) throws IOException
      {
          Epoch e = Epoch.serializer.deserialize(in, v);
          withLastModified(e);
          deserializeInternal(in, v);
      }
      abstract void deserializeInternal(DataInputPlus in, Version version) throws IOException;
  
      public long serializedSize(Version v)
      {
          long size = Epoch.serializer.serializedSize(lastModified(), v);
          size += serializedSizeInternal(v);
          return size;
      }
      abstract long serializedSizeInternal(Version v);
  }
  