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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package java.lang.annotation; | ||
| 27 | |||
| 28 | /** | ||
| 29 | * Indicates the kinds of program element to which an annotation type | ||
| 30 | * is applicable. If a Target meta-annotation is not present on an | ||
| 31 | * annotation type declaration, the declared type may be used on any | ||
| 32 | * program element. If such a meta-annotation is present, the compiler | ||
| 33 | * will enforce the specified usage restriction. | ||
| 34 | * | ||
| 35 | * For example, this meta-annotation indicates that the declared type is | ||
| 36 | * itself a meta-annotation type. It can only be used on annotation type | ||
| 37 | * declarations: | ||
| 38 | * <pre> | ||
| 39 | * @Target(ElementType.ANNOTATION_TYPE) | ||
| 40 | * public @interface MetaAnnotationType { | ||
| 41 | * ... | ||
| 42 | * } | ||
| 43 | * </pre> | ||
| 44 | * This meta-annotation indicates that the declared type is intended solely | ||
| 45 | * for use as a member type in complex annotation type declarations. It | ||
| 46 | * cannot be used to annotate anything directly: | ||
| 47 | * <pre> | ||
| 48 | * @Target({}) | ||
| 49 | * public @interface MemberType { | ||
| 50 | * ... | ||
| 51 | * } | ||
| 52 | * </pre> | ||
| 53 | * It is a compile-time error for a single ElementType constant to | ||
| 54 | * appear more than once in a Target annotation. For example, the | ||
| 55 | * following meta-annotation is illegal: | ||
| 56 | * <pre> | ||
| 57 | * @Target({ElementType.FIELD, ElementType.METHOD, ElementType.FIELD}) | ||
| 58 | * public @interface Bogus { | ||
| 59 | * ... | ||
| 60 | * } | ||
| 61 | * </pre> | ||
| 62 | */ | ||
| 63 | @Documented | ||
| 64 | @Retention(RetentionPolicy.RUNTIME) | ||
| 65 | @Target(ElementType.ANNOTATION_TYPE) | ||
| 66 | public @interface Target { | ||
| 67 | ElementType[] value(); | ||
| 68 | } | ||