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rxjava2-extensions developed by David Karnok

There is a newer version: 0.20.10

/*
 * Copyright 2016 David Karnok
 *
 * 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 hu.akarnokd.rxjava2.parallel;

import org.reactivestreams.Publisher;
import org.reactivestreams.Subscriber;

/**
 * Wraps multiple Publishers into a ParallelFlowable which runs them
 * in parallel.
 *
 * @param  the value type
 */
final class ParallelFromArray extends ParallelFlowable {
    final Publisher[] sources;

    ParallelFromArray(Publisher[] sources) {
        this.sources = sources;
    }

    @Override
    public int parallelism() {
        return sources.length;
    }

    @Override
    public void subscribe(Subscriber[] subscribers) {
        if (!validate(subscribers)) {
            return;
        }

        int n = subscribers.length;

        for (int i = 0; i < n; i++) {
            sources[i].subscribe(subscribers[i]);
        }
    }
}