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 org.apache.cassandra.db.marshal.ValueAccessor;
  import org.apache.cassandra.utils.ByteBufferUtil;
  
  import java.nio.ByteBuffer;
  
  public class BytesSerializer extends TypeSerializer<ByteBuffer>
  {
      public static final BytesSerializer instance = new BytesSerializer();
  
      public ByteBuffer serialize(ByteBuffer bytes)
      {
          // We make a copy in case the user modifies the input
          return bytes.duplicate();
      }
  
      public <V> ByteBuffer deserialize(V value, ValueAccessor<V> accessor)
      {
          // This is from the DB, so it is not shared with someone else
          return accessor.toBuffer(value);
      }
  
      public <V> void validate(V value, ValueAccessor<V> accessor) throws MarshalException
      {
          // all bytes are legal.
      }
  
      public String toString(ByteBuffer value)
      {
          return ByteBufferUtil.bytesToHex(value);
      }
  
      public Class<ByteBuffer> getType()
      {
          return ByteBuffer.class;
      }
  
      @Override
      public <V> boolean isNull(V buffer, ValueAccessor<V> accessor)
      {
          // !buffer.hasRemaining() is not "null" for bytes types, it is byte[0]
          return buffer == null;
      }
  
      @Override
      protected String toCQLLiteralNonNull(ByteBuffer buffer)
      {
          return "0x" + toString(deserialize(buffer));
      }
  }
  