src/com/android/settings/bluetooth/RestrictionUtils.java

/*
 * Copyright (C) 2017 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.settings.bluetooth;

import android.app.admin.DevicePolicyIdentifiers;
import android.app.admin.DevicePolicyManager;
import android.app.admin.EnforcingAdmin;
import android.app.admin.PolicyEnforcementInfo;
import android.content.Context;
import android.os.UserHandle;

import androidx.annotation.Nullable;

import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
import com.android.settingslib.RestrictedLockUtilsInternal;

/**
 * A utility class to aid testing.
 */
public class RestrictionUtils {

    public RestrictionUtils() {}

    /**
     *  Utility method to check if user restriction is enforced on the current user.
     *
     * <p> It helps with testing - override it to avoid calling static method which calls system
     * API.
     */
    public EnforcedAdmin checkIfRestrictionEnforced(Context context, String restriction) {
        return RestrictedLockUtilsInternal.checkIfRestrictionEnforced(
                context, restriction, UserHandle.myUserId());
    }

    /**
     *  Utility method to check if user restriction is enforced on the current user by admin.
     *  Returns null if it's not enforced. Doesn't include it in the result if the restriction is
     *  only enforced by the system.
     *
     * <p> It helps with testing - override it to avoid calling static method which calls system
     * API.
     */
    @Nullable
    public EnforcingAdmin checkIfUserRestrictionEnforced(Context context, String restriction) {
        DevicePolicyManager dpm = context.getSystemService(DevicePolicyManager.class);
        if (dpm == null) {
            return null;
        }
        PolicyEnforcementInfo policyEnforcementInfo = dpm.getEnforcingAdminsForPolicy(
                DevicePolicyIdentifiers.getIdentifierForUserRestriction(restriction),
                UserHandle.myUserId());
        if (policyEnforcementInfo.getAllAdmins().isEmpty()
                || policyEnforcementInfo.isOnlyEnforcedBySystem()) {
            return null;
        }
        return policyEnforcementInfo.getMostImportantEnforcingAdmin();
    }
}