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.serializers;
  
  import java.nio.ByteBuffer;
  import java.util.UUID;
  
  import org.apache.cassandra.db.marshal.ValueAccessor;
  import org.apache.cassandra.utils.ByteBufferUtil;
  import org.apache.cassandra.utils.UUIDGen;
  
  public class UUIDSerializer extends TypeSerializer<UUID>
  {
      public static final UUIDSerializer instance = new UUIDSerializer();
  
      public <V> UUID deserialize(V value, ValueAccessor<V> accessor)
      {
          return accessor.isEmpty(value) ? null : accessor.toUUID(value);
      }
  
      public ByteBuffer serialize(UUID value)
      {
          return value == null ? ByteBufferUtil.EMPTY_BYTE_BUFFER : UUIDGen.toByteBuffer(value);
      }
  
  
      public <V> void validate(V value, ValueAccessor<V> accessor) throws MarshalException
      {
          if (accessor.size(value) != 16 && !accessor.isEmpty(value))
              throw new MarshalException(String.format("UUID should be 16 or 0 bytes (%d)", accessor.size(value)));
          // not sure what the version should be for this.
      }
  
      public String toString(UUID value)
      {
          return value == null ? "" : value.toString();
      }
  
      public Class<UUID> getType()
      {
          return UUID.class;
      }
  }
  