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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.rxjava3.operators;
import io.reactivex.rxjava3.annotations.NonNull;
import io.reactivex.rxjava3.core.FlowableSubscriber;
/**
* A {@link FlowableSubscriber} with an additional {@link #tryOnNext(Object)} method that
* tells the caller the specified value has been accepted or not.
*
* This allows certain queue-drain or source-drain operators
* to avoid requesting 1 on behalf of a dropped value.
*
* @param the value type
* @since 3.1.1
*/
public interface ConditionalSubscriber<@NonNull T> extends FlowableSubscriber {
/**
* Conditionally takes the value.
* @param t the value to deliver
* @return true if the value has been accepted, false if the value has been rejected
* and the next value can be sent immediately
*/
boolean tryOnNext(@NonNull T t);
}
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