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.maybe;
  
  import java.util.concurrent.atomic.AtomicReference;
  
  import io.reactivex.rxjava3.core.MaybeObserver;
  import io.reactivex.rxjava3.disposables.Disposable;
  import io.reactivex.rxjava3.exceptions.*;
  import io.reactivex.rxjava3.functions.*;
  import io.reactivex.rxjava3.internal.disposables.DisposableHelper;
  import io.reactivex.rxjava3.internal.functions.Functions;
  import io.reactivex.rxjava3.observers.LambdaConsumerIntrospection;
  import io.reactivex.rxjava3.plugins.RxJavaPlugins;
  
  /**
   * MaybeObserver that delegates the onSuccess, onError and onComplete method calls to callbacks.
   *
   * @param <T> the value type
   */
  public final class MaybeCallbackObserver<T>
  extends AtomicReference<Disposable>
  implements MaybeObserver<T>, Disposable, LambdaConsumerIntrospection {
  
      private static final long serialVersionUID = -6076952298809384986L;
  
      final Consumer<? super T> onSuccess;
  
      final Consumer<? super Throwable> onError;
  
      final Action onComplete;
  
      public MaybeCallbackObserver(Consumer<? super T> onSuccess, Consumer<? super Throwable> onError,
              Action onComplete) {
          super();
          this.onSuccess = onSuccess;
          this.onError = onError;
          this.onComplete = onComplete;
      }
  
      @Override
      public void dispose() {
          DisposableHelper.dispose(this);
      }
  
      @Override
      public boolean isDisposed() {
          return DisposableHelper.isDisposed(get());
      }
  
      @Override
      public void onSubscribe(Disposable d) {
          DisposableHelper.setOnce(this, d);
      }
  
      @Override
      public void onSuccess(T value) {
          lazySet(DisposableHelper.DISPOSED);
          try {
              onSuccess.accept(value);
          } catch (Throwable ex) {
              Exceptions.throwIfFatal(ex);
              RxJavaPlugins.onError(ex);
          }
      }
  
      @Override
      public void onError(Throwable e) {
          lazySet(DisposableHelper.DISPOSED);
          try {
              onError.accept(e);
          } catch (Throwable ex) {
              Exceptions.throwIfFatal(ex);
              RxJavaPlugins.onError(new CompositeException(e, ex));
          }
      }
  
      @Override
      public void onComplete() {
          lazySet(DisposableHelper.DISPOSED);
          try {
              onComplete.run();
          } catch (Throwable ex) {
              Exceptions.throwIfFatal(ex);
              RxJavaPlugins.onError(ex);
          }
      }
  
      @Override
      public boolean hasCustomOnError() {
          return onError != Functions.ON_ERROR_MISSING;
      }
  }
  