1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.dialer.p13n.inference; 18 19 import android.content.Context; 20 import android.database.Cursor; 21 import android.support.annotation.MainThread; 22 import android.support.annotation.NonNull; 23 import android.support.annotation.Nullable; 24 import com.android.dialer.common.Assert; 25 import com.android.dialer.common.ConfigProviderBindings; 26 import com.android.dialer.p13n.inference.protocol.P13nRanker; 27 import com.android.dialer.p13n.inference.protocol.P13nRankerFactory; 28 import java.util.List; 29 30 /** Single entry point for all personalized ranking. */ 31 public final class P13nRanking { 32 33 private static P13nRanker ranker; 34 P13nRanking()35 private P13nRanking() {} 36 37 @MainThread 38 @NonNull get(@onNull Context context)39 public static P13nRanker get(@NonNull Context context) { 40 Assert.isNotNull(context); 41 Assert.isMainThread(); 42 43 if (ranker != null) { 44 return ranker; 45 } 46 47 if (!ConfigProviderBindings.get(context).getBoolean("p13n_ranker_should_enable", false)) { 48 setToIdentityRanker(); 49 return ranker; 50 } 51 52 Context application = context.getApplicationContext(); 53 if (application instanceof P13nRankerFactory) { 54 ranker = ((P13nRankerFactory) application).newP13nRanker(); 55 } 56 57 if (ranker == null) { 58 setToIdentityRanker(); 59 } 60 return ranker; 61 } 62 setToIdentityRanker()63 private static void setToIdentityRanker() { 64 ranker = 65 new P13nRanker() { 66 @Override 67 public void refresh(@Nullable P13nRefreshCompleteListener listener) {} 68 69 @Override 70 public List<String> rankList(List<String> phoneNumbers) { 71 return phoneNumbers; 72 } 73 74 @NonNull 75 @Override 76 public Cursor rankCursor(@NonNull Cursor phoneQueryResults, int queryLength) { 77 return phoneQueryResults; 78 } 79 80 @Override 81 public boolean shouldShowEmptyListForNullQuery() { 82 return true; 83 } 84 }; 85 } 86 setForTesting(@onNull P13nRanker ranker)87 public static void setForTesting(@NonNull P13nRanker ranker) { 88 P13nRanking.ranker = ranker; 89 } 90 } 91