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.map.externalizable;
  
  import java.io.Externalizable;
  import java.io.IOException;
  import java.io.ObjectInput;
  import java.io.ObjectOutput;
  import java.util.ArrayList;
  import java.util.List;
  
  public class SomeClass implements Externalizable {
  
      final List<String> hits = new ArrayList<>();
      private long id;
  
      @Override
      public void writeExternal(ObjectOutput out) throws IOException {
          out.writeLong(id);
          out.writeInt(hits.size());
          for (int i = 0; i < hits.size(); i++) {
              out.writeObject(hits.get(i));
          }
      }
  
      @Override
      public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
          id = in.readLong();
          int size = in.readInt();
          for (int i = 0; i < size; i++) {
              hits.add((String) in.readObject());
          }
      }
  }