content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  // Includes work from:
  /*
   * Copyright 2018 LINE Corporation
   *
   * LINE Corporation 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:
   *
   *   https://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.opentelemetry.instrumentation.rxjava.v2_0;
  
  import io.opentelemetry.context.Context;
  import io.opentelemetry.context.Scope;
  import io.reactivex.internal.fuseable.ConditionalSubscriber;
  import io.reactivex.parallel.ParallelFlowable;
  import org.reactivestreams.Subscriber;
  
  class TracingParallelFlowable<T> extends ParallelFlowable<T> {
  
    private final ParallelFlowable<T> source;
    private final Context context;
  
    TracingParallelFlowable(ParallelFlowable<T> source, Context context) {
      this.source = source;
      this.context = context;
    }
  
    @SuppressWarnings("unchecked")
    @Override
    public void subscribe(Subscriber<? super T>[] subscribers) {
      if (!validate(subscribers)) {
        return;
      }
      int n = subscribers.length;
      @SuppressWarnings("rawtypes")
      Subscriber<? super T>[] parents = new Subscriber[n];
      for (int i = 0; i < n; i++) {
        Subscriber<? super T> z = subscribers[i];
        if (z instanceof ConditionalSubscriber) {
          parents[i] =
              new TracingConditionalSubscriber<>((ConditionalSubscriber<? super T>) z, context);
        } else {
          parents[i] = new TracingSubscriber<>(z, context);
        }
      }
      try (Scope ignored = context.makeCurrent()) {
        source.subscribe(parents);
      }
    }
  
    @Override
    public int parallelism() {
      return source.parallelism();
    }
  }
  