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.SizeMarshaller;
  import net.openhft.chronicle.wire.WireIn;
  import net.openhft.chronicle.wire.WireOut;
  import org.jetbrains.annotations.NotNull;
  
  public final class ConstantSizeMarshaller implements SizeMarshaller {
  
      /**
       * Config field
       */
      private long constantSize;
  
      public ConstantSizeMarshaller(long constantSize) {
          this.constantSize = constantSize;
      }
  
      @Override
      public int storingLength(long size) {
          return 0;
      }
  
      @Override
      public long minStorableSize() {
          return constantSize;
      }
  
      @Override
      public long maxStorableSize() {
          return constantSize;
      }
  
      @Override
      public int minStoringLengthOfSizesInRange(long minSize, long maxSize) {
          return 0;
      }
  
      @Override
      public int maxStoringLengthOfSizesInRange(long minSize, long maxSize) {
          return 0;
      }
  
      @Override
      public void writeSize(Bytes out, long sizeToWrite) {
          if (sizeToWrite != constantSize) {
              throw new IllegalArgumentException(
                      "sizeToWrite: " + sizeToWrite + ", constant size should be: " + constantSize);
          }
          // do nothing
      }
  
      @Override
      public long readSize(Bytes in) {
          return constantSize;
      }
  
      @Override
      public void readMarshallable(@NotNull WireIn wireIn) {
          constantSize = wireIn.read(() -> "constantSize").int64();
      }
  
      @Override
      public void writeMarshallable(@NotNull WireOut wireOut) {
          wireOut.write(() -> "constantSize").int64(constantSize);
      }
  }
  