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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.packageinstaller.role.model;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.res.Resources;
import android.text.TextUtils;
import android.util.Log;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import com.android.packageinstaller.permission.utils.CollectionUtils;
import com.android.packageinstaller.role.utils.PackageUtils;
import java.util.List;
/**
* Mixin for {@link RoleBehavior#getDefaultHolders(Role, Context)} that returns a single default
* role holder from the corresponding string resource.
*/
public class ExclusiveDefaultHolderMixin {
private static final String LOG_TAG = ExclusiveDefaultHolderMixin.class.getSimpleName();
private ExclusiveDefaultHolderMixin() {}
/**
* @see Role#getDefaultHolders(Context)
*/
@NonNull
public static List<String> getDefaultHolders(@NonNull Role role, @NonNull String resourceName,
@NonNull Context context) {
return CollectionUtils.singletonOrEmpty(getDefaultHolder(role, resourceName, context));
}
/**
* @see Role#getDefaultHolders(Context)
*/
@Nullable
public static String getDefaultHolder(@NonNull Role role, @NonNull String resourceName,
@NonNull Context context) {
Resources resources = context.getResources();
int resourceId = resources.getIdentifier(resourceName, "string", "android");
if (resourceId == 0) {
Log.w(LOG_TAG, "Cannot find resource for default holder: " + resourceName);
return null;
}
String packageName;
try {
packageName = resources.getString(resourceId);
} catch (Resources.NotFoundException e) {
Log.w(LOG_TAG, "Cannot get resource for default holder: " + resourceName, e);
return null;
}
if (TextUtils.isEmpty(packageName)) {
return null;
}
ApplicationInfo applicationInfo = PackageUtils.getApplicationInfo(packageName, context);
if (applicationInfo == null) {
Log.w(LOG_TAG, "Cannot get ApplicationInfo for default holder, config: " + resourceName
+ ", package: " + packageName);
return null;
}
if ((applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
Log.w(LOG_TAG, "Default holder is not a system app, config: " + resourceName
+ ", package: " + packageName);
return null;
}
if (!role.isPackageQualified(packageName, context)) {
Log.w(LOG_TAG, "Default holder does not qualify for the role, config: " + resourceName
+ ", package: " + packageName);
return null;
}
return packageName;
}
}
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