code: /*
   * Copyright (c) 2016-present, RxJava 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 io.reactivex.rxjava3.internal.operators.single;
  
  import java.util.concurrent.TimeUnit;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.disposables.Disposable;
  import io.reactivex.rxjava3.internal.disposables.SequentialDisposable;
  
  public final class SingleDelay<T> extends Single<T> {
  
      final SingleSource<? extends T> source;
      final long time;
      final TimeUnit unit;
      final Scheduler scheduler;
      final boolean delayError;
  
      public SingleDelay(SingleSource<? extends T> source, long time, TimeUnit unit, Scheduler scheduler, boolean delayError) {
          this.source = source;
          this.time = time;
          this.unit = unit;
          this.scheduler = scheduler;
          this.delayError = delayError;
      }
  
      @Override
      protected void subscribeActual(final SingleObserver<? super T> observer) {
  
          final SequentialDisposable sd = new SequentialDisposable();
          observer.onSubscribe(sd);
          source.subscribe(new Delay(sd, observer));
      }
  
      final class Delay implements SingleObserver<T> {
          private final SequentialDisposable sd;
          final SingleObserver<? super T> downstream;
  
          Delay(SequentialDisposable sd, SingleObserver<? super T> observer) {
              this.sd = sd;
              this.downstream = observer;
          }
  
          @Override
          public void onSubscribe(Disposable d) {
              sd.replace(d);
          }
  
          @Override
          public void onSuccess(final T value) {
              sd.replace(scheduler.scheduleDirect(new OnSuccess(value), time, unit));
          }
  
          @Override
          public void onError(final Throwable e) {
              sd.replace(scheduler.scheduleDirect(new OnError(e), delayError ? time : 0, unit));
          }
  
          final class OnSuccess implements Runnable {
              private final T value;
  
              OnSuccess(T value) {
                  this.value = value;
              }
  
              @Override
              public void run() {
                  downstream.onSuccess(value);
              }
          }
  
          final class OnError implements Runnable {
              private final Throwable e;
  
              OnError(Throwable e) {
                  this.e = e;
              }
  
              @Override
              public void run() {
                  downstream.onError(e);
              }
          }
      }
  }
  