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;
  
  import net.openhft.chronicle.bytes.Bytes;
  import net.openhft.chronicle.hash.serialization.BytesReader;
  import net.openhft.chronicle.hash.serialization.BytesWriter;
  import net.openhft.chronicle.hash.serialization.impl.EnumMarshallable;
  import net.openhft.chronicle.set.Builder;
  import org.jetbrains.annotations.NotNull;
  import org.junit.Test;
  
  public class Issue43Test {
  
      public static void main(String[] args) {
          new Issue43Test().testIssue43();
      }
  
      @Test
      public void testIssue43() {
          try {
              ChronicleMap<Long, ValueWrapper> map = ChronicleMapBuilder
                      .of(Long.class, ValueWrapper.class)
                      .entries(512)
                      .valueMarshaller(ArrayMarshaller.INSTANCE)
                      .constantValueSizeBySample(new ValueWrapper(new double[128]))
                      .createPersistedTo(Builder.getPersistenceFile());
              //System.out.println("Created the monkey map ValueWrapper 128");
          } catch (Throwable ex) {
              System.out.println(ex);
          }
      }
  
      private static class ValueWrapper {
          private final double[] values;
  
          public ValueWrapper(double[] values) {
              this.values = values;
          }
      }
  
      private static final class ArrayMarshaller
              implements BytesReader<ValueWrapper>, BytesWriter<ValueWrapper>,
              EnumMarshallable<ArrayMarshaller> {
          public static final ArrayMarshaller INSTANCE = new ArrayMarshaller();
  
          private ArrayMarshaller() {
          }
  
          @Override
          public void write(Bytes bytes, @NotNull ValueWrapper vw) {
              bytes.writeInt(vw.values.length);
  
              for (int i = 0; i < vw.values.length; i++) {
                  bytes.writeDouble(vw.values[i]);
              }
          }
  
          @NotNull
          @Override
          public ValueWrapper read(Bytes in, ValueWrapper using) {
              throw new UnsupportedOperationException("Not supported yet.");
          }
  
          @NotNull
          @Override
          public ArrayMarshaller readResolve() {
              return INSTANCE;
          }
      }
  }
  