/* * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ package java.lang.annotation; /** * Indicates the kinds of program element to which an annotation type * is applicable. If a Target meta-annotation is not present on an * annotation type declaration, the declared type may be used on any * program element. If such a meta-annotation is present, the compiler * will enforce the specified usage restriction. * * For example, this meta-annotation indicates that the declared type is * itself a meta-annotation type. It can only be used on annotation type * declarations: * <pre> * @Target(ElementType.ANNOTATION_TYPE) * public @interface MetaAnnotationType { * ... * } * </pre> * This meta-annotation indicates that the declared type is intended solely * for use as a member type in complex annotation type declarations. It * cannot be used to annotate anything directly: * <pre> * @Target({}) * public @interface MemberType { * ... * } * </pre> * It is a compile-time error for a single ElementType constant to * appear more than once in a Target annotation. For example, the * following meta-annotation is illegal: * <pre> * @Target({ElementType.FIELD, ElementType.METHOD, ElementType.FIELD}) * public @interface Bogus { * ... * } * </pre> */ @Documented @Retention(RetentionPolicy.RUNTIME) @Target(ElementType.ANNOTATION_TYPE) public @interface Target { ElementType[] value(); }