/*
 * Copyright (c) 2011-2017 Pivotal Software Inc, All Rights Reserved.
 *
 * 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
 *
 *       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
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package reactor.core.publisher;

import java.util.Objects;
import java.util.function.Predicate;

import org.reactivestreams.Subscription;
import reactor.core.CoreSubscriber;
import reactor.core.Fuseable;
import reactor.util.annotation.Nullable;

Emits a single boolean true if all values of the source sequence match the predicate.

The implementation uses short-circuit logic and completes with false if the predicate doesn't match a value.

Type parameters:
  • <T> – the source value type
See Also:
/** * Emits a single boolean true if all values of the source sequence match * the predicate. * <p> * The implementation uses short-circuit logic and completes with false if * the predicate doesn't match a value. * * @param <T> the source value type * @see <a href="https://github.com/reactor/reactive-streams-commons">Reactive-Streams-Commons</a> */
final class MonoAll<T> extends MonoFromFluxOperator<T, Boolean> implements Fuseable { final Predicate<? super T> predicate; MonoAll(Flux<? extends T> source, Predicate<? super T> predicate) { super(source); this.predicate = Objects.requireNonNull(predicate, "predicate"); } @Override public CoreSubscriber<? super T> subscribeOrReturn(CoreSubscriber<? super Boolean> actual) { return new AllSubscriber<T>(actual, predicate); } @Override public Object scanUnsafe(Attr key) { if (key == Attr.RUN_STYLE) return Attr.RunStyle.SYNC; return super.scanUnsafe(key); } static final class AllSubscriber<T> extends Operators.MonoSubscriber<T, Boolean> { final Predicate<? super T> predicate; Subscription s; boolean done; AllSubscriber(CoreSubscriber<? super Boolean> actual, Predicate<? super T> predicate) { super(actual); this.predicate = predicate; } @Override @Nullable public Object scanUnsafe(Attr key) { if (key == Attr.TERMINATED) return done; if (key == Attr.PARENT) return s; if (key == Attr.RUN_STYLE) return Attr.RunStyle.SYNC; return super.scanUnsafe(key); } @Override public void cancel() { s.cancel(); super.cancel(); } @Override public void onSubscribe(Subscription s) { if (Operators.validate(this.s, s)) { this.s = s; actual.onSubscribe(this); s.request(Long.MAX_VALUE); } } @Override public void onNext(T t) { if (done) { return; } boolean b; try { b = predicate.test(t); } catch (Throwable e) { done = true; actual.onError(Operators.onOperatorError(s, e, t, actual.currentContext())); return; } if (!b) { done = true; s.cancel(); complete(false); } } @Override public void onError(Throwable t) { if (done) { Operators.onErrorDropped(t, actual.currentContext()); return; } done = true; actual.onError(t); } @Override public void onComplete() { if (done) { return; } done = true; complete(true); } } }