1 /*
2  * Copyright (C) 2006 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.google.inject;
18 
19 import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
20 import static java.lang.annotation.RetentionPolicy.RUNTIME;
21 
22 import java.lang.annotation.Retention;
23 import java.lang.annotation.Target;
24 
25 /**
26  * Annotates annotations which are used for binding. Only one such annotation may apply to a single
27  * injection point. You must also annotate binder annotations with {@code @Retention(RUNTIME)}. For
28  * example:
29  *
30  * <pre>
31  *   {@code @}Retention(RUNTIME)
32  *   {@code @}Target({ FIELD, PARAMETER, METHOD })
33  *   {@code @}BindingAnnotation
34  *   public {@code @}interface Transactional {}
35  * </pre>
36  *
37  * @author crazybob@google.com (Bob Lee)
38  */
39 @Target(ANNOTATION_TYPE)
40 @Retention(RUNTIME)
41 public @interface BindingAnnotation {}
42