MaybeNever.java

/**
 * 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.internal.operators.maybe;

import io.reactivex.*;
import io.reactivex.internal.disposables.EmptyDisposable;

/**
 * Doesn't signal any event other than onSubscribe.
 */
public final class MaybeNever extends Maybe<Object> {

    public static final MaybeNever INSTANCE = new MaybeNever();

    @Override
    protected void subscribeActual(MaybeObserver<? super Object> observer) {
        observer.onSubscribe(EmptyDisposable.NEVER);
    }
}