1 /* 2 * Copyright (C) 2017 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.settings.intelligence.overlay; 18 19 import android.content.Context; 20 import android.text.TextUtils; 21 import android.util.Log; 22 23 import com.android.settings.intelligence.R; 24 import com.android.settings.intelligence.experiment.ExperimentFeatureProvider; 25 import com.android.settings.intelligence.instrumentation.MetricsFeatureProvider; 26 import com.android.settings.intelligence.search.SearchFeatureProvider; 27 import com.android.settings.intelligence.suggestions.SuggestionFeatureProvider; 28 29 public abstract class FeatureFactory { 30 31 private static final String LOG_TAG = "FeatureFactory"; 32 private static final boolean DEBUG = false; 33 34 protected static FeatureFactory sFactory; 35 36 /** 37 * Returns a factory for creating feature controllers. Creates the factory if it does not 38 * already exist. Uses the value of {@link R.string#config_featureFactory} to instantiate 39 * a factory implementation. 40 */ get(Context context)41 public static FeatureFactory get(Context context) { 42 if (sFactory != null) { 43 return sFactory; 44 } 45 46 if (DEBUG) { 47 Log.d(LOG_TAG, "getFactory"); 48 } 49 final String clsName = context.getString(R.string.config_featureFactory); 50 if (TextUtils.isEmpty(clsName)) { 51 throw new UnsupportedOperationException("No feature factory configured"); 52 } 53 try { 54 sFactory = (FeatureFactory) context.getClassLoader().loadClass(clsName).newInstance(); 55 } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) { 56 throw new FactoryNotFoundException(e); 57 } 58 59 if (DEBUG) { 60 Log.d(LOG_TAG, "started " + sFactory.getClass().getSimpleName()); 61 } 62 return sFactory; 63 } 64 metricsFeatureProvider(Context context)65 public abstract MetricsFeatureProvider metricsFeatureProvider(Context context); 66 suggestionFeatureProvider()67 public abstract SuggestionFeatureProvider suggestionFeatureProvider(); 68 experimentFeatureProvider()69 public abstract ExperimentFeatureProvider experimentFeatureProvider(); 70 searchFeatureProvider()71 public abstract SearchFeatureProvider searchFeatureProvider(); 72 73 public static final class FactoryNotFoundException extends RuntimeException { FactoryNotFoundException(Throwable throwable)74 public FactoryNotFoundException(Throwable throwable) { 75 super("Unable to create factory. Did you misconfigure Proguard?", throwable); 76 } 77 } 78 79 } 80