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/*
* Copyright (C) 2016 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.dialer.p13n.inference;
import android.content.Context;
import android.database.Cursor;
import android.support.annotation.MainThread;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import com.android.dialer.common.Assert;
import com.android.dialer.configprovider.ConfigProviderBindings;
import com.android.dialer.p13n.inference.protocol.P13nRanker;
import com.android.dialer.p13n.inference.protocol.P13nRankerFactory;
import java.util.List;
/** Single entry point for all personalized ranking. */
public final class P13nRanking {
private static P13nRanker ranker;
private P13nRanking() {}
@MainThread
@NonNull
public static P13nRanker get(@NonNull Context context) {
Assert.isNotNull(context);
Assert.isMainThread();
if (ranker != null) {
return ranker;
}
if (!ConfigProviderBindings.get(context).getBoolean("p13n_ranker_should_enable", false)) {
setToIdentityRanker();
return ranker;
}
Context application = context.getApplicationContext();
if (application instanceof P13nRankerFactory) {
ranker = ((P13nRankerFactory) application).newP13nRanker();
}
if (ranker == null) {
setToIdentityRanker();
}
return ranker;
}
private static void setToIdentityRanker() {
ranker =
new P13nRanker() {
@Override
public void refresh(@Nullable P13nRefreshCompleteListener listener) {}
@Override
public List<String> rankList(List<String> phoneNumbers) {
return phoneNumbers;
}
@NonNull
@Override
public Cursor rankCursor(@NonNull Cursor phoneQueryResults, int queryLength) {
return phoneQueryResults;
}
@Override
public boolean shouldShowEmptyListForNullQuery() {
return true;
}
};
}
public static void setForTesting(@NonNull P13nRanker ranker) {
P13nRanking.ranker = ranker;
}
}
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