Pierre De Rop | 6e8f921 | 2016-02-20 21:44:59 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
| 3 | * or more contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. The ASF licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 19 | package org.apache.felix.dm.lambda.callbacks; |
| 20 | |
| 21 | import java.util.Objects; |
| 22 | |
| 23 | /** |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 24 | * Represents a callback that accepts the result of a CompletableFuture operation. The callback is invoked on a Component implementation class. |
| 25 | * The type of the class on which the callback is invoked on is represented by the T generic parameter. |
| 26 | * The type of the result of the CompletableFuture is represented by the F generic parameter. |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 27 | * |
| 28 | * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| 29 | */ |
| 30 | @FunctionalInterface |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 31 | public interface CbFuture<T, F> extends SerializableLambda { |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 32 | /** |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 33 | * Handles the given arguments. |
| 34 | * @param instance the Component implementation instance on which the callback is invoked on. |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 35 | * @param future the result of a CompletableFuture operation. |
| 36 | */ |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 37 | void accept(T instance, F future); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 38 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 39 | default CbFuture<T, F> andThen(CbFuture<? super T, F> after) { |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 40 | Objects.requireNonNull(after); |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 41 | return (T instance, F future) -> { |
| 42 | accept(instance, future); |
| 43 | after.accept(instance, future); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 44 | }; |
| 45 | } |
| 46 | } |