1 /*
2  * Copyright (C) 2023 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.systemui.util.reference
18 
19 import java.lang.ref.WeakReference
20 
21 class FakeWeakReferenceFactory : WeakReferenceFactory {
22     private val managedReferents = mutableListOf<WeakReference<*>>()
23 
createnull24     override fun <T> create(referent: T): WeakReference<T> {
25         val weakRef = WeakReference(referent)
26         managedReferents.add(weakRef)
27         return weakRef
28     }
29 
30     /**
31      * Clears any [WeakReference] objects pointing to this object. If argument is null, clears all
32      * references.
33      */
clearnull34     fun <T> clear(referent: T) {
35         managedReferents.filter { it.get() == referent }.forEach { it.clear() }
36     }
37 }
38