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 | |
Pierre De Rop | 57ffa3f | 2016-02-19 12:54:30 +0000 | [diff] [blame] | 21 | import java.util.Dictionary; |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 22 | import java.util.Objects; |
| 23 | |
| 24 | import org.apache.felix.dm.Component; |
Pierre De Rop | 57ffa3f | 2016-02-19 12:54:30 +0000 | [diff] [blame] | 25 | import org.apache.felix.dm.lambda.ConfigurationDependencyBuilder; |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 26 | |
| 27 | /** |
| 28 | * Represents a callback(Configuration, Component) which accepts a configuration type for wrapping properties |
Pierre De Rop | 57ffa3f | 2016-02-19 12:54:30 +0000 | [diff] [blame] | 29 | * behind a dynamic proxy interface. |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 30 | * |
| 31 | * <p> The T generic parameter represents the type of the class on which the callback is invoked on. |
| 32 | * <p> The U generic parameter represents the type of the configuration class passed to the callback argument. |
| 33 | * |
Pierre De Rop | 57ffa3f | 2016-02-19 12:54:30 +0000 | [diff] [blame] | 34 | * <p> Using such callback provides a way for creating type-safe configurations from the actual {@link Dictionary} that is |
| 35 | * normally injected by Dependency Manager. |
| 36 | * For more information about configuration types, please refer to {@link ConfigurationDependencyBuilder}. |
| 37 | * |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame] | 38 | * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| 39 | */ |
| 40 | @FunctionalInterface |
| 41 | public interface CbConfigurationComponent<T, U> extends SerializableLambda { |
| 42 | /** |
| 43 | * Handles the given arguments |
| 44 | * @param instance the Component implementation instance on which the callback is invoked on. |
| 45 | * @param configuration the configuration proxy |
| 46 | * @param component the callback Component |
| 47 | */ |
| 48 | void accept(T instance, U configuration, Component component); |
| 49 | |
| 50 | default CbConfigurationComponent<T, U> andThen(CbConfigurationComponent<T, U> after) { |
| 51 | Objects.requireNonNull(after); |
| 52 | return (T instance, U configuration, Component component) -> { |
| 53 | accept(instance, configuration, component); |
| 54 | after.accept(instance, configuration, component); |
| 55 | }; |
| 56 | } |
| 57 | } |