code: /*
   * Copyright 2012-2018 Chronicle Map Contributors
   *
   * Licensed 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 net.openhft.chronicle.hash.serialization.impl;
  
  import net.openhft.chronicle.bytes.Bytes;
  import net.openhft.chronicle.hash.serialization.BytesWriter;
  import net.openhft.chronicle.hash.serialization.ListMarshaller;
  import net.openhft.chronicle.hash.serialization.SetMarshaller;
  import org.jetbrains.annotations.NotNull;
  
  import static net.openhft.chronicle.core.util.ObjectUtils.requireNonNull;
  
  /**
   * {@link BytesWriter} implementation for {@link CharSequence}, for the primary ChronicleMap's key
   * or value type {@link CharSequenceUtf8DataAccess} + {@link CharSequenceSizedReader} are more
   * efficient (because don't store the size twice), so this writer is useful in conjunction with
   * {@link ListMarshaller} or {@link SetMarshaller}.
   *
   * @see StringBytesReader
   */
  public final class CharSequenceBytesWriter
          implements BytesWriter<CharSequence>, EnumMarshallable<CharSequenceBytesWriter> {
      public static final CharSequenceBytesWriter INSTANCE = new CharSequenceBytesWriter();
  
      private CharSequenceBytesWriter() {
      }
  
      @Override
      public void write(Bytes out, @NotNull CharSequence toWrite) {
          requireNonNull(toWrite);
          out.writeUtf8(toWrite);
      }
  
      @NotNull
      @Override
      public CharSequenceBytesWriter readResolve() {
          return INSTANCE;
      }
  }
  