https://github.com/ReactiveX/RxJava: Reactive Extensions for Java
  • David Karnok 
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.

/**
 * 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;

import io.reactivex.annotations.*;


Interface to map/wrap a downstream observer to an upstream observer.

Type parameters:
  • <Downstream> – the value type of the downstream
  • <Upstream> – the value type of the upstream
/**
 * Interface to map/wrap a downstream observer to an upstream observer.
 *
 * @param <Downstream> the value type of the downstream
 * @param <Upstream> the value type of the upstream
 */
public interface MaybeOperator<Downstream, Upstream> {
    
Applies a function to the child MaybeObserver and returns a new parent MaybeObserver.

Params:
  • observer – the child MaybeObserver instance
Throws:
Returns:the parent MaybeObserver instance
/**
     * Applies a function to the child MaybeObserver and returns a new parent MaybeObserver.
     * @param observer the child MaybeObserver instance
     * @return the parent MaybeObserver instance
     * @throws Exception on failure
     */
    @NonNull
    MaybeObserver<? super Upstream> apply(@NonNull MaybeObserver<? super Downstream> observer) throws Exception;
}