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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 | +} | |