xref: /aosp_15_r20/external/dagger2/java/dagger/hilt/migration/AliasOf.java (revision f585d8a307d0621d6060bd7e80091fdcbf94fe27)
1*f585d8a3SJacky Wang /*
2*f585d8a3SJacky Wang  * Copyright (C) 2020 The Dagger Authors.
3*f585d8a3SJacky Wang  *
4*f585d8a3SJacky Wang  * Licensed under the Apache License, Version 2.0 (the "License");
5*f585d8a3SJacky Wang  * you may not use this file except in compliance with the License.
6*f585d8a3SJacky Wang  * You may obtain a copy of the License at
7*f585d8a3SJacky Wang  *
8*f585d8a3SJacky Wang  * http://www.apache.org/licenses/LICENSE-2.0
9*f585d8a3SJacky Wang  *
10*f585d8a3SJacky Wang  * Unless required by applicable law or agreed to in writing, software
11*f585d8a3SJacky Wang  * distributed under the License is distributed on an "AS IS" BASIS,
12*f585d8a3SJacky Wang  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13*f585d8a3SJacky Wang  * See the License for the specific language governing permissions and
14*f585d8a3SJacky Wang  * limitations under the License.
15*f585d8a3SJacky Wang  */
16*f585d8a3SJacky Wang 
17*f585d8a3SJacky Wang package dagger.hilt.migration;
18*f585d8a3SJacky Wang 
19*f585d8a3SJacky Wang import dagger.hilt.GeneratesRootInput;
20*f585d8a3SJacky Wang import java.lang.annotation.Annotation;
21*f585d8a3SJacky Wang import java.lang.annotation.ElementType;
22*f585d8a3SJacky Wang import java.lang.annotation.Retention;
23*f585d8a3SJacky Wang import java.lang.annotation.RetentionPolicy;
24*f585d8a3SJacky Wang import java.lang.annotation.Target;
25*f585d8a3SJacky Wang 
26*f585d8a3SJacky Wang /**
27*f585d8a3SJacky Wang  * Defines an alias between an existing Hilt scope and the annotated scope. For example, the
28*f585d8a3SJacky Wang  * following code makes {@literal @}MyScope a functional replacement for {@literal @}ActivityScope.
29*f585d8a3SJacky Wang  *
30*f585d8a3SJacky Wang  * <p>
31*f585d8a3SJacky Wang  *
32*f585d8a3SJacky Wang  * <pre>
33*f585d8a3SJacky Wang  *   {@literal @}Scope
34*f585d8a3SJacky Wang  *   {@literal @}AliasOf(ActivityScope.class)
35*f585d8a3SJacky Wang  *   public {@literal @}interface MyScope{}
36*f585d8a3SJacky Wang  * </pre>
37*f585d8a3SJacky Wang  *
38*f585d8a3SJacky Wang  * <p>
39*f585d8a3SJacky Wang  */
40*f585d8a3SJacky Wang @Target(ElementType.ANNOTATION_TYPE)
41*f585d8a3SJacky Wang @Retention(RetentionPolicy.CLASS)
42*f585d8a3SJacky Wang @GeneratesRootInput
43*f585d8a3SJacky Wang public @interface AliasOf {
44*f585d8a3SJacky Wang   /** Returns the existing Hilt scope(s) that the annotated scope is aliasing. */
value()45*f585d8a3SJacky Wang   Class<? extends Annotation>[] value();
46*f585d8a3SJacky Wang }
47