1 /*
2  * Copyright 2022 The Android Open Source Project
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 sample.kotlin.foo;
18 
19 import kotlin.OptIn;
20 import sample.kotlin.ExperimentalJavaAnnotation;
21 
22 /**
23  * Regression test for b/218798815 where the lint check yields false positives on usages within an
24  * annotated package.
25  */
26 @SuppressWarnings("unused")
27 public class RegressionTestJava218798815 {
28 
29     /**
30      * Safe call into a method on a class within the same experimental package.
31      */
safeMethodInExperimentalPackage()32     void safeMethodInExperimentalPackage() {
33         AnnotatedJavaPackage experimentalObject = new AnnotatedJavaPackage();
34         experimentalObject.method();
35     }
36 
37     /**
38      * Safe call with redundant propagation of experimental marker.
39      */
40     @ExperimentalJavaAnnotation
safePropagateMarker()41     void safePropagateMarker() {
42         AnnotatedJavaPackage experimentalObject = new AnnotatedJavaPackage();
43         experimentalObject.method();
44     }
45 
46     /**
47      * Safe call with unnecessary and invalid opt-in to experimental marker.
48      */
49     @OptIn(markerClass = ExperimentalJavaAnnotation.class)
safeOptInMarker()50     void safeOptInMarker() {
51         AnnotatedJavaPackage experimentalObject = new AnnotatedJavaPackage();
52         experimentalObject.method();
53     }
54 
55     /**
56      * Safe call into a method with an safe call. This should not be flagged, as the
57      * called method itself is not experimental.
58      */
safeSelfExperimental()59     void safeSelfExperimental() {
60         safeMethodInExperimentalPackage();
61     }
62 
63     /**
64      * Safe call into a redundantly-annotated experimental method within the same experimetnal
65      * package.
66      */
safeSelfPropagateMarker()67     void safeSelfPropagateMarker() {
68         safePropagateMarker();
69     }
70 }
71