Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 1 | package org.apache.felix.dm.lambda.callbacks; |
| 2 | |
| 3 | import java.util.Objects; |
| 4 | |
| 5 | import org.osgi.framework.ServiceReference; |
| 6 | |
| 7 | /** |
| 8 | * Represents a callback(Service, ServiceReference) that is invoked on a Component implementation class. |
| 9 | * The type of the class on which the callback is invoked on is represented by the T generic parameter. |
| 10 | * |
| 11 | * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| 12 | */ |
| 13 | @FunctionalInterface |
| 14 | public interface CbServiceRef<T, S> extends SerializableLambda { |
| 15 | /** |
| 16 | * Handles the given arguments. |
| 17 | * @param instance the Component implementation instance on which the callback is invoked on. |
| 18 | * @param service first callback arg |
| 19 | * @param ref second callback arg |
| 20 | */ |
| 21 | void accept(T instance, S service, ServiceReference<S> ref); |
| 22 | |
| 23 | default CbServiceRef<T, S> andThen(CbServiceRef<? super T, S> after) { |
| 24 | Objects.requireNonNull(after); |
| 25 | return (T instance, S service, ServiceReference<S> ref) -> { |
| 26 | accept(instance, service, ref); |
| 27 | after.accept(instance, service, ref); |
| 28 | }; |
| 29 | } |
| 30 | } |