| /* |
| * Copyright (c) 2019, 2020, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.internal.javac; |
| |
| import java.lang.annotation.*; |
| |
| /** |
| * Indicates the API declaration in question is associated with a |
| * <em>preview feature</em>. See JEP 12: "Preview Language and VM |
| * Features" (http://openjdk.java.net/jeps/12). |
| * |
| * Note this internal annotation is handled specially by the javac compiler. |
| * To work properly with {@code --release older-release}, it requires special |
| * handling in {@code make/langtools/src/classes/build/tools/symbolgenerator/CreateSymbols.java} |
| * and {@code src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassReader.java}. |
| * |
| * @since 14 |
| */ |
| // Match the meaningful targets of java.lang.Deprecated, omit local |
| // variables and parameter declarations |
| @Target({ElementType.METHOD, |
| ElementType.CONSTRUCTOR, |
| ElementType.FIELD, |
| ElementType.PACKAGE, |
| ElementType.MODULE, |
| ElementType.TYPE}) |
| // CLASS retention will hopefully be sufficient for the purposes at hand |
| @Retention(RetentionPolicy.CLASS) |
| // *Not* @Documented |
| public @interface PreviewFeature { |
| /** |
| * Name of the preview feature the annotated API is associated |
| * with. |
| */ |
| public Feature feature(); |
| |
| public boolean reflective() default false; |
| |
| public enum Feature { |
| /* |
| * This one can only be removed after JDK 17 |
| */ |
| SEALED_CLASSES, |
| SWITCH_PATTERN_MATCHING, |
| /** |
| * A key for testing. |
| */ |
| TEST, |
| ; |
| } |
| } |