| // Copyright (c) 2022, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| package com.android.tools.r8.ir.desugar.desugaredlibrary.specificationconversion; |
| |
| import com.android.tools.r8.graph.DexApplication; |
| import com.android.tools.r8.graph.DexClass; |
| import com.android.tools.r8.graph.DexType; |
| import com.android.tools.r8.utils.AndroidApiLevel; |
| |
| public class LibraryValidator { |
| |
| /** |
| * In program compilation, The LibraryValidator estimates if the library passed is at the expected |
| * minimum level, if it is not, raises a warning. |
| */ |
| public static void validate( |
| DexApplication app, boolean libraryCompilation, AndroidApiLevel requiredCompilationAPILevel) { |
| if (libraryCompilation) { |
| // In library compilation, the classes are passed as program classes and are always found. |
| return; |
| } |
| DexType levelType; |
| if (requiredCompilationAPILevel.isEqualTo(AndroidApiLevel.O)) { |
| levelType = app.dexItemFactory.createType("Ljava/time/LocalTime;"); |
| } else if (requiredCompilationAPILevel.isEqualTo(AndroidApiLevel.R)) { |
| levelType = app.dexItemFactory.createType("Ljava/util/concurrent/Flow;"); |
| } else { |
| app.options.reporter.warning( |
| "Unsupported requiredCompilationAPILevel: " + requiredCompilationAPILevel); |
| return; |
| } |
| DexClass dexClass = app.definitionFor(levelType); |
| if (dexClass == null) { |
| app.options.reporter.warning( |
| "Desugared library requires to be compiled with a library file of API greater or equal to" |
| + " " |
| + requiredCompilationAPILevel |
| + ", but it seems the library file passed is of a lower API."); |
| } |
| } |
| } |