src/com/android/networkrecommendation/scoring/util/Util.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.networkrecommendation.scoring.util;

import static com.android.networkrecommendation.Constants.TAG;

import android.content.Context;
import android.net.NetworkScoreManager;
import android.net.ScoredNetwork;
import com.android.networkrecommendation.util.Blog;

/** Utility methods for the scorer. */
public final class Util {

    /** @return true if GmsCore is the active network scorer. */
    public static boolean isScorerActive(Context context) {
        NetworkScoreManager scoreManager =
                (NetworkScoreManager) context.getSystemService(Context.NETWORK_SCORE_SERVICE);
        final String activeScorer = scoreManager.getActiveScorerPackage();
        final String packageName = context.getPackageName();

        return packageName.equals(activeScorer);
    }

    /** Clear scores in the platform if we're the active scorer. */
    public static boolean safelyClearScores(Context context) {
        try {
            NetworkScoreManager scoreManager =
                    (NetworkScoreManager) context.getSystemService(Context.NETWORK_SCORE_SERVICE);
            scoreManager.clearScores();
            return true;
        } catch (SecurityException e) {
            Blog.v(
                    TAG,
                    e,
                    "SecurityException trying to clear scores, probably just an unavoidable race condition. "
                            + "Ignoring.");
            return false;
        }
    }

    /** Update scores in the platform if we're the active scorer. */
    public static boolean safelyUpdateScores(Context context, ScoredNetwork[] networkScores) {
        try {
            NetworkScoreManager scoreManager =
                    (NetworkScoreManager) context.getSystemService(Context.NETWORK_SCORE_SERVICE);
            scoreManager.updateScores(networkScores);
            return true;
        } catch (SecurityException e) {
            Blog.v(
                    TAG,
                    e,
                    "SecurityException trying to update scores, probably just an unavoidable race condition. "
                            + "Ignoring.");
            return false;
        }
    }
}