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 | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 19 | package org.apache.felix.dm.lambda.callbacks; |
| 20 | |
| 21 | import java.util.Objects; |
| 22 | |
| 23 | import org.apache.felix.dm.Component; |
| 24 | import org.osgi.framework.ServiceReference; |
| 25 | |
| 26 | /** |
| 27 | * Represents a callback(Service, Component, ServiceReference) that is invoked on a Component implementation class. |
| 28 | * The type of the class on which the callback is invoked on is represented by the T generic parameter. |
| 29 | * |
| 30 | * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| 31 | */ |
| 32 | @FunctionalInterface |
| 33 | public interface CbServiceComponentRef<T, S> extends SerializableLambda { |
| 34 | /** |
| 35 | * Handles the given arguments. |
| 36 | * @param instance the Component implementation instance on which the callback is invoked on. |
| 37 | * @param service the first callback parameter |
| 38 | * @param c the second callback parameter |
| 39 | * @param ref the third callback parameter |
| 40 | */ |
| 41 | void accept(T instance, S service, Component c, ServiceReference<S> ref); |
| 42 | |
| 43 | default CbServiceComponentRef<T, S> andThen(CbServiceComponentRef<T, S> after) { |
| 44 | Objects.requireNonNull(after); |
| 45 | return (T instance, S service, Component c, ServiceReference<S> ref) -> { |
| 46 | accept(instance, service, c, ref); |
| 47 | after.accept(instance, service, c, ref); |
| 48 | }; |
| 49 | } |
| 50 | } |