io.relayr.java.helper.observer.BooleanObserver Maven / Gradle / Ivy

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package io.relayr.java.helper.observer;

import rx.Observer;

/**
 * This observable reacts on onNext or onComplete only once
 */
public abstract class BooleanObserver implements Observer {

    private boolean successSent = false;

    @Override public void onCompleted() {if (!successSent) onNext(null);}

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

    @Override public void onNext(T o) {
        if (!successSent) {
            successSent = true;
            success();
        }
    }

    public abstract void error(Throwable e);

    public abstract void success();
}