/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements. See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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 org.apache.logging.log4j.core.config;
  
  import java.util.Date;
  import java.util.concurrent.Delayed;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.ScheduledFuture;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  
  /**
   *
   */
  public class CronScheduledFuture<V> implements ScheduledFuture<V> {
  
      private volatile FutureData futureData;
  
      public CronScheduledFuture(final ScheduledFuture<V> future, final Date runDate) {
          this.futureData = new FutureData(future, runDate);
      }
  
      public Date getFireTime() {
          return futureData.runDate;
      }
  
      void reset(final ScheduledFuture<?> future, final Date runDate) {
          futureData = new FutureData(future, runDate);
      }
  
      @Override
      public long getDelay(final TimeUnit unit) {
          return futureData.scheduledFuture.getDelay(unit);
      }
  
      @Override
      public int compareTo(final Delayed delayed) {
          return futureData.scheduledFuture.compareTo(delayed);
      }
  
      @Override
      public boolean cancel(final boolean mayInterruptIfRunning) {
          return futureData.scheduledFuture.cancel(mayInterruptIfRunning);
      }
  
      @Override
      public boolean isCancelled() {
          return futureData.scheduledFuture.isCancelled();
      }
  
      @Override
      public boolean isDone() {
          return futureData.scheduledFuture.isDone();
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public V get() throws InterruptedException, ExecutionException {
          return (V) futureData.scheduledFuture.get();
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public V get(final long timeout, final TimeUnit unit)
              throws InterruptedException, ExecutionException, TimeoutException {
          return (V) futureData.scheduledFuture.get(timeout, unit);
      }
  
      private class FutureData {
  
          private final ScheduledFuture<?> scheduledFuture;
          private final Date runDate;
  
          FutureData(final ScheduledFuture<?> future, final Date runDate) {
              this.scheduledFuture = future;
              this.runDate = runDate;
          }
      }
  }