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 android.tools.common 18 19 object Cache { 20 private var cache = mutableMapOf<Any, Any>() 21 22 data class Backup(val cache: MutableMap<Any, Any>) 23 getnull24 fun <T : Any> get(element: T): T { 25 return cache.getOrPut(element) { element } as T 26 } 27 clearnull28 fun clear() { 29 cache = mutableMapOf() 30 } 31 backupnull32 fun backup(): Backup { 33 return Backup(cache.toMutableMap()) 34 } 35 restorenull36 fun restore(backup: Backup) { 37 cache = backup.cache 38 } 39 } 40