/*
 * Copyright (C) 2011 The Guava Authors
 *
 * 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 org.glassfish.jersey.internal.guava;

import java.util.concurrent.Future;

Transforms a value, possibly asynchronously. For an example usage and more information, see Futures.transform(ListenableFuture<I>, Function<? super I,? extends O>). 
Author:
Chris Povirk
Since:
11.0/**
 * Transforms a value, possibly asynchronously. For an example usage and more
 * information, see {@link Futures#transform(ListenableFuture, AsyncFunction)}.
 *
 * @author Chris Povirk
 * @since 11.0
 */
interface AsyncFunction<I, O> {
    
Returns an output Future to use in place of the given 
input. The output Future need not be 
done, making AsyncFunction suitable for asynchronous derivations. 

Throwing an exception from this method is equivalent to returning a failing Future. /**
     * Returns an output {@code Future} to use in place of the given {@code
     * input}. The output {@code Future} need not be {@linkplain Future#isDone
     * done}, making {@code AsyncFunction} suitable for asynchronous derivations.
     * <p>
     * <p>Throwing an exception from this method is equivalent to returning a
     * failing {@code Future}.
     */
    ListenableFuture<O> apply(I input);
}