1 /*
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 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
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24  */
25 
26 package jdk.incubator.code;
27 
28 import java.lang.annotation.*;
29 import java.lang.reflect.Method;
30 
31 /**
32  * A program element annotated with this annotation enables code reflection in the annotated program element,
33  * or in one or more program elements contained within the annotated program element.
34  * <p>
35  * The program elements for which code reflection is enabled are said to be a <em>reflectable</em> program elements.
36  * There are three kinds of reflectable program elements: methods, lambda expressions and method references.
37  * Code models for reflectable methods can be obtained using the {@link Op#ofMethod(Method)} method. Code
38  * models for reflectable lambdas and method references can be obtained using the {@link Op#ofQuotable(Object)} method.
39  * <p>
40  * This annotation only has effect on the program elements listed below:
41  * <li>When a method is annotated with this annotation, the method becomes reflectable, and all the lambda expressions
42  * and method references enclosed in it also become reflectable.</li>
43  * <li>When a variable declaration (a field, or a local variable) is annotated with this annotation, all lambda expressions
44  * and method references enclosed in the variable initializer (if present) also become reflectable.</li>
45  * <li>When the type of a cast expression is annotated with this annotation, the lambda expression
46  * or method reference the cast refers to (if any) becomes reflectable.</li>
47  * </ul>
48  */
49 @Target({ElementType.LOCAL_VARIABLE, ElementType.FIELD,
50          ElementType.METHOD, ElementType.TYPE_USE})
51 @Retention(RetentionPolicy.RUNTIME)
52 public @interface Reflect {
53 }