58 lines
2.3 KiB
Java
58 lines
2.3 KiB
Java
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/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.system.virtualmachine;
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import static android.content.pm.PackageManager.FEATURE_VIRTUALIZATION_FRAMEWORK;
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import android.annotation.SystemApi;
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import android.app.SystemServiceRegistry;
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import android.content.Context;
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/**
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* Holds initialization code for virtualization module
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*
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* @hide
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*/
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@SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
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public class VirtualizationFrameworkInitializer {
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private VirtualizationFrameworkInitializer() {}
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/**
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* Called by the static initializer in the {@link SystemServiceRegistry}, and registers {@link
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* VirtualMachineManager} to the {@link Context}. so that it's accessible from {@link
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* Context#getSystemService(String)}.
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*/
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public static void registerServiceWrappers() {
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// Note: it's important that the getPackageManager().hasSystemFeature() check is executed
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// in the lambda, and not directly in the registerServiceWrappers method. The
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// registerServiceWrappers is called during Zygote static initialization, and at that
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// point the PackageManager is not available yet.
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//
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// On the other hand, the lambda is executed after the app calls Context.getSystemService
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// (VirtualMachineManager.class), at which point the PackageManager is available. The
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// result of the lambda is cached on per-context basis.
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SystemServiceRegistry.registerContextAwareService(
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Context.VIRTUALIZATION_SERVICE,
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VirtualMachineManager.class,
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ctx ->
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ctx.getPackageManager().hasSystemFeature(FEATURE_VIRTUALIZATION_FRAMEWORK)
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? new VirtualMachineManager(ctx)
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: null);
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}
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}
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