1 /*
2  * Copyright (C) 2015 The Dagger Authors.
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 dagger.multibindings;
18 
19 import static java.lang.annotation.ElementType.METHOD;
20 import static java.lang.annotation.RetentionPolicy.RUNTIME;
21 
22 import dagger.MapKey;
23 import java.lang.annotation.Documented;
24 import java.lang.annotation.Retention;
25 import java.lang.annotation.Target;
26 
27 /**
28  * A {@link MapKey} annotation for maps with {@code Class<?>} keys.
29  *
30  * <p>If your map's keys can be constrained, consider using a custom annotation instead, with a
31  * member whose type is {@code Class<? extends Something>}.
32  */
33 @Documented
34 @Target(METHOD)
35 @Retention(RUNTIME)
36 @MapKey
37 public @interface ClassKey {
value()38   Class<?> value();
39 }
40