| package org.apache.felix.dm.lambda.callbacks; |
| |
| import java.util.Dictionary; |
| import java.util.Objects; |
| |
| import org.apache.felix.dm.lambda.ConfigurationDependencyBuilder; |
| |
| /** |
| * Represents a callback(Configuration) that is invoked on a Component implementation class. |
| * The callback accepts a type-safe configuration class for wrapping properties behind a dynamic proxy interface. |
| * |
| * <p> The T generic parameter represents the type of the class on which the callback is invoked on. |
| * <p> The U generic parameter represents the type of the configuration class passed to the callback argument. |
| * |
| * <p> Using such callback provides a way for creating type-safe configurations from the actual {@link Dictionary} that is |
| * normally injected by Dependency Manager. |
| * For more information about configuration types, please refer to {@link ConfigurationDependencyBuilder}. |
| * |
| * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| */ |
| @FunctionalInterface |
| public interface CbConfiguration<T, U> extends SerializableLambda { |
| /** |
| * Handles the given arguments |
| * @param instance the Component implementation instance on which the callback is invoked on. |
| * @param configuration the configuration proxy |
| */ |
| void accept(T instance, U configuration); |
| |
| default CbConfiguration<T, U> andThen(CbConfiguration<T, U> after) { |
| Objects.requireNonNull(after); |
| return (T instance, U configuration) -> { |
| accept(instance, configuration); |
| after.accept(instance, configuration); |
| }; |
| } |
| } |