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.hash.ChronicleHashCorruption;
  import org.jetbrains.annotations.Nullable;
  import org.slf4j.helpers.MessageFormatter;
  
  import java.util.function.Supplier;
  
  public class ChronicleHashCorruptionImpl implements ChronicleHashCorruption {
  
      private int segmentIndex;
      private Supplier<String> messageSupplier;
      private Throwable exception;
      private String message;
  
      public static void report(
              ChronicleHashCorruption.Listener corruptionListener,
              ChronicleHashCorruptionImpl corruption, int segmentIndex,
              Supplier<String> messageSupplier) {
          corruption.set(segmentIndex, messageSupplier, null);
          corruptionListener.onCorruption(corruption);
      }
  
      public static void reportException(
              ChronicleHashCorruption.Listener corruptionListener,
              ChronicleHashCorruptionImpl corruption, int segmentIndex,
              Supplier<String> messageSupplier, Throwable exception) {
          corruption.set(segmentIndex, messageSupplier, exception);
          corruptionListener.onCorruption(corruption);
      }
  
      public static String format(String message, Object... args) {
          return MessageFormatter.arrayFormat(message, args).getMessage();
      }
  
      private void set(int segmentIndex, Supplier<String> messageSupplier, Throwable exception) {
          this.segmentIndex = segmentIndex;
          this.messageSupplier = messageSupplier;
          this.exception = exception;
          this.message = null;
      }
  
      @Override
      public String message() {
          if (message == null) {
              message = messageSupplier.get();
          }
          return message;
      }
  
      @Nullable
      @Override
      public Throwable exception() {
          return exception;
      }
  
      @Override
      public int segmentIndex() {
          return segmentIndex;
      }
  }
  