1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
5  * except in compliance with the License. You may obtain a copy of the License at
6  *
7  *      http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software distributed under the
10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
11  * KIND, either express or implied. See the License for the specific language governing
12  * permissions and limitations under the License.
13  */
14 
15 package com.android.systemui.plugins.annotations;
16 
17 import java.lang.annotation.Repeatable;
18 import java.lang.annotation.Retention;
19 import java.lang.annotation.RetentionPolicy;
20 
21 /**
22  * Used to indicate that an interface in the plugin library needs another
23  * interface to function properly. When this is added, it will be enforced
24  * that all plugins that @Requires the annotated interface also @Requires
25  * the specified class as well.
26  */
27 @Retention(RetentionPolicy.RUNTIME)
28 @Repeatable(value = Dependencies.class)
29 public @interface DependsOn {
target()30     Class<?> target();
31 
32 }
33