1 /*
2  * Copyright 2024 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 com.android.intentresolver.data.repository
18 
19 import com.android.intentresolver.shared.model.ActivityModel
20 import dagger.hilt.android.scopes.ActivityRetainedScoped
21 import javax.inject.Inject
22 import kotlinx.atomicfu.atomic
23 
24 /** An [ActivityModel] repository that captures the first value. */
25 @ActivityRetainedScoped
26 class ActivityModelRepository @Inject constructor() {
27     private val _value = atomic<ActivityModel?>(null)
28 
29     val value: ActivityModel
<lambda>null30         get() = requireNotNull(_value.value) { "Repository has not been initialized" }
31 
initializenull32     fun initialize(block: () -> ActivityModel) {
33         if (_value.value == null) {
34             _value.compareAndSet(null, block())
35         }
36     }
37 }
38