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/**
 * 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.observable.internal.operators;

import io.reactivex.common.Disposable;
import io.reactivex.observable.*;
import io.reactivex.observable.extensions.FuseToObservable;

public final class ObservableIgnoreElementsCompletable extends Completable implements FuseToObservable {

    final ObservableSource source;

    public ObservableIgnoreElementsCompletable(ObservableSource source) {
        this.source = source;
    }

    @Override
    public void subscribeActual(final CompletableObserver t) {
        source.subscribe(new IgnoreObservable(t));
    }

    @Override
    public Observable fuseToObservable() {
        return RxJavaObservablePlugins.onAssembly(new ObservableIgnoreElements(source));
    }

    static final class IgnoreObservable implements Observer, Disposable {
        final CompletableObserver actual;

        Disposable d;

        IgnoreObservable(CompletableObserver t) {
            this.actual = t;
        }

        @Override
        public void onSubscribe(Disposable s) {
            this.d = s;
            actual.onSubscribe(this);
        }

        @Override
        public void onNext(T v) {
            // deliberately ignored
        }

        @Override
        public void onError(Throwable e) {
            actual.onError(e);
        }

        @Override
        public void onComplete() {
            actual.onComplete();
        }

        @Override
        public void dispose() {
            d.dispose();
        }

        @Override
        public boolean isDisposed() {
            return d.isDisposed();
        }
    }

}