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.core.OS;
  import net.openhft.chronicle.core.util.Time;
  import org.junit.Test;
  
  import java.io.File;
  import java.io.IOException;
  
  public class ArrayTest {
      // don't use Double[] as it uses ~3.5x the memory of a double[]
      @Test
      public void testDoubleArray() throws IOException {
          File file = new File(OS.getTarget() + "/testDoubleArray-" + Time.uniqueId());
          ChronicleMap<Long, double[]> writeMap = ChronicleMapBuilder
                  .of(Long.class, double[].class)
                  .entries(1_000)
                  .averageValue(new double[150])
                  .createPersistedTo(file);
          double[] a = {2D};
          writeMap.put(1L, a);
  
          //read
          ChronicleMap<Long, double[]> readMap =
                  ChronicleMapBuilder.of(Long.class, double[].class)
                          .averageValue(new double[150])
                          .createPersistedTo(file);
          double[] b = readMap.get(1L);
      }
  
      // don't use Long[] as it uses ~3.5x the memory of a long[]
      @Test
      public void testLongArray() throws IOException {
          File file = new File(OS.getTarget() + "/testLongArray-" + Time.uniqueId());
          ChronicleMap<Long, long[]> writeMap = ChronicleMapBuilder
                  .of(Long.class, long[].class)
                  .entries(1_000)
                  .averageValue(new long[150])
                  .createPersistedTo(file);
          long[] a = {2};
          writeMap.put(1L, a);
  
          //read
          ChronicleMap<Long, long[]> readMap =
                  ChronicleMapBuilder.of(Long.class, long[].class)
                          .averageValue(new long[150])
                          .createPersistedTo(file);
          long[] b = readMap.get(1L);
      }
  }