1 /* 2 * Copyright (c) 2017 Mockito contributors 3 * This program is made available under the terms of the MIT License. 4 */ 5 package org.mockito; 6 7 import java.lang.annotation.Documented; 8 import java.lang.annotation.Retention; 9 import java.lang.annotation.RetentionPolicy; 10 11 /** 12 * Indicates to the user that she should not provide custom implementations of given type. 13 * Helps framework integrators and our users understand how to use Mockito API safely, 14 * without the risk of getting exposed to incompatible changes. 15 * Some types that are a part of Mockito public API are not intended to be extended. 16 * It's because Mockito team needs to be able to add new methods to some types without breaking compatibility contract. 17 * We would never break compatibility by changing the signature of an existing public method. 18 * However, we need flexibility to add new methods to some types to evolve the API if needed. 19 * Public types are all types that are *not* under "org.mockito.internal.*" package. 20 * <p> 21 * Absence of {@code NotExtensible} annotation on a type *does not* mean it is intended to be extended. 22 * The annotation has been introduced late and therefore it is not used frequently in the codebase. 23 * Many public types from Mockito API are not intended for extension, even though they do not have this annotation applied. 24 * 25 * @since 2.10.0 26 */ 27 @Retention(RetentionPolicy.RUNTIME) 28 @Documented 29 public @interface NotExtensible { 30 } 31
