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.db.marshal;
  
  import java.nio.ByteBuffer;
  
  import org.apache.cassandra.cql3.CQL3Type;
  import org.apache.cassandra.cql3.terms.Constants;
  import org.apache.cassandra.cql3.terms.Term;
  import org.apache.cassandra.cql3.functions.ArgumentDeserializer;
  import org.apache.cassandra.serializers.TypeSerializer;
  import org.apache.cassandra.serializers.BytesSerializer;
  import org.apache.cassandra.serializers.MarshalException;
  import org.apache.cassandra.transport.ProtocolVersion;
  import org.apache.cassandra.utils.ByteBufferUtil;
  import org.apache.cassandra.utils.Hex;
  
  public class BytesType extends AbstractType<ByteBuffer>
  {
      public static final BytesType instance = new BytesType();
  
      private static final ByteBuffer MASKED_VALUE = ByteBufferUtil.EMPTY_BYTE_BUFFER;
  
      BytesType() {super(ComparisonType.BYTE_ORDER);} // singleton
  
      @Override
      public boolean allowsEmpty()
      {
          return true;
      }
  
      public ByteBuffer fromString(String source)
      {
          try
          {
              return ByteBuffer.wrap(Hex.hexToBytes(source));
          }
          catch (NumberFormatException e)
          {
              throw new MarshalException(String.format("cannot parse '%s' as hex bytes", source), e);
          }
      }
  
      @Override
      public Term fromJSONObject(Object parsed) throws MarshalException
      {
          try
          {
              String parsedString = (String) parsed;
              if (!parsedString.startsWith("0x"))
                  throw new MarshalException(String.format("String representation of blob is missing 0x prefix: %s", parsedString));
  
              return new Constants.Value(BytesType.instance.fromString(parsedString.substring(2)));
          }
          catch (ClassCastException | MarshalException exc)
          {
              throw new MarshalException(String.format("Value '%s' is not a valid blob representation: %s", parsed, exc.getMessage()));
          }
      }
  
      @Override
      public String toJSONString(ByteBuffer buffer, ProtocolVersion protocolVersion)
      {
          return "\"0x" + ByteBufferUtil.bytesToHex(buffer) + '"';
      }
  
      @Override
      public boolean isCompatibleWith(AbstractType<?> previous)
      {
          // Both asciiType and utf8Type really use bytes comparison and
          // bytesType validate everything, so it is compatible with the former.
          return this == previous || previous == AsciiType.instance || previous == UTF8Type.instance;
      }
  
      @Override
      public boolean isValueCompatibleWithInternal(AbstractType<?> otherType)
      {
          // BytesType can read anything
          return true;
      }
  
      public CQL3Type asCQL3Type()
      {
          return CQL3Type.Native.BLOB;
      }
  
      public TypeSerializer<ByteBuffer> getSerializer()
      {
          return BytesSerializer.instance;
      }
  
      @Override
      public ArgumentDeserializer getArgumentDeserializer()
      {
          return ArgumentDeserializer.NOOP_DESERIALIZER;
      }
  
      @Override
      public ByteBuffer getMaskedValue()
      {
          return MASKED_VALUE;
      }
  }
  