/* * Copyright (C) 2010-2017 The Project Lombok Authors. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package lombok.experimental; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; /** * Put on any field to make lombok generate delegate methods that forward the call to this field. * * Example: * <pre> * private @Delegate List<String> foo; * </pre> * * will generate for example an {@code boolean add(String)} method, which contains: {@code return foo.add(arg);}, as well as all other methods in {@code List}. * * All public instance methods of the field's type, as well as all public instance methods of all the field's type's superfields are delegated, except for all methods * that exist in {@link Object}, the {@code canEqual(Object)} method, and any methods that appear in types * that are listed in the {@code excludes} property. * <p> * Complete documentation is found at <a href="https://projectlombok.org/features/experimental/Delegate">the project lombok features page for @Delegate</a>. */ @Target({ElementType.FIELD, ElementType.METHOD}) @Retention(RetentionPolicy.SOURCE) public @interface Delegate { /** * Normally the type of the field is used as delegate type. However, to choose a different type to delegate, you can list one (or more) types here. Note that types with * type arguments can only be done as a field type. A solution for this is to create a private inner interface/class with the appropriate types extended, and possibly * with all methods you'd like to delegate listed, and then supply that class here. The field does not actually have to implement the type you're delegating; the * type listed here is used only to determine which delegate methods to generate. * * NB: All methods in {@code Object}, as well as {@code canEqual(Object other)} will never be delegated. * * @return For each method (not already in {@code java.lang.Object}) in these types, generate a delegate method. */ Class<?>[] types() default {}; /** * Each method in any of the types listed here (include supertypes) will <em>not</em> be delegated. * * NB: All methods in {@code Object}, as well as {@code canEqual(Object other)} will never be delegated. * * @return For each method (not already in {@code java.lang.Object}) in these types, skip generating a delegate method (overrides {@code types()}). */ Class<?>[] excludes() default {}; }