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 com.datastax.oss.driver.internal.core.type.codec;
  
  import com.datastax.oss.driver.api.core.ProtocolVersion;
  import com.datastax.oss.driver.api.core.type.DataType;
  import com.datastax.oss.driver.api.core.type.DataTypes;
  import com.datastax.oss.driver.api.core.type.codec.TypeCodec;
  import com.datastax.oss.driver.api.core.type.reflect.GenericType;
  import edu.umd.cs.findbugs.annotations.NonNull;
  import edu.umd.cs.findbugs.annotations.Nullable;
  import java.nio.ByteBuffer;
  import java.util.Optional;
  import java.util.UUID;
  import net.jcip.annotations.ThreadSafe;
  
  @ThreadSafe
  public class UuidCodec implements TypeCodec<UUID> {
    @NonNull
    @Override
    public GenericType<UUID> getJavaType() {
      return GenericType.UUID;
    }
  
    @NonNull
    @Override
    public DataType getCqlType() {
      return DataTypes.UUID;
    }
  
    @Override
    public boolean accepts(@NonNull Object value) {
      return value instanceof UUID;
    }
  
    @Override
    public boolean accepts(@NonNull Class<?> javaClass) {
      return javaClass == UUID.class;
    }
  
    @Nullable
    @Override
    public ByteBuffer encode(@Nullable UUID value, @NonNull ProtocolVersion protocolVersion) {
      if (value == null) {
        return null;
      }
      ByteBuffer bytes = ByteBuffer.allocate(16);
      bytes.putLong(0, value.getMostSignificantBits());
      bytes.putLong(8, value.getLeastSignificantBits());
      return bytes;
    }
  
    @Nullable
    @Override
    public UUID decode(@Nullable ByteBuffer bytes, @NonNull ProtocolVersion protocolVersion) {
      if (bytes == null || bytes.remaining() == 0) {
        return null;
      } else if (bytes.remaining() != 16) {
        throw new IllegalArgumentException(
            "Unexpected number of bytes for a UUID, expected 16, got " + bytes.remaining());
      } else {
        return new UUID(bytes.getLong(bytes.position()), bytes.getLong(bytes.position() + 8));
      }
    }
  
    @NonNull
    @Override
    public String format(@Nullable UUID value) {
      return (value == null) ? "NULL" : value.toString();
    }
  
    @Nullable
    @Override
    public UUID parse(@Nullable String value) {
      try {
        return (value == null || value.isEmpty() || value.equalsIgnoreCase("NULL"))
            ? null
            : UUID.fromString(value);
      } catch (IllegalArgumentException e) {
        throw new IllegalArgumentException(
            String.format("Cannot parse UUID value from \"%s\"", value), e);
      }
    }
  
    @NonNull
    @Override
    public Optional<Integer> serializedSize() {
      return Optional.of(16);
    }
  }
  