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 org.apache.cassandra.db.TypeSizes;
  import org.apache.cassandra.io.util.DataInputPlus;
  import org.apache.cassandra.io.util.DataOutputPlus;
  import org.apache.cassandra.tcm.MetadataKey;
  import org.apache.cassandra.tcm.serialization.MetadataSerializer;
  import org.apache.cassandra.tcm.serialization.Version;
  import org.apache.cassandra.utils.FBUtilities;
  
  public class ExtensionKey<V, K extends ExtensionValue<V>> extends MetadataKey
  {
      public static final Serializer serializer = new Serializer();
      public final Class<K> valueType;
  
      public ExtensionKey(String id, Class<K> valueType)
      {
          super(id);
          this.valueType = valueType;
      }
  
      public K newValue()
      {
          return valueType.cast(FBUtilities.construct(valueType.getName(), "extension value"));
      }
  
      public static final class Serializer implements MetadataSerializer<ExtensionKey<?, ?>>
      {
          @Override
          public void serialize(ExtensionKey<?, ?> t, DataOutputPlus out, Version version) throws IOException
          {
              out.writeUTF(t.id);
              out.writeUTF(t.valueType.getName());
          }
  
          @Override
          public ExtensionKey<?, ?> deserialize(DataInputPlus in, Version version) throws IOException
          {
              String id = in.readUTF();
              String valType = in.readUTF();
              return new ExtensionKey(id, FBUtilities.classForName(valType, "value type"));
          }
  
          @Override
          public long serializedSize(ExtensionKey<?, ?> t, Version version)
          {
              return TypeSizes.sizeof(t.id) + TypeSizes.sizeof(t.valueType.getName());
          }
      }
  }
  
  