1 /* 2 * Copyright (C) 2023 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.ondevicepersonalization.services.federatedcompute; 18 19 import android.adservices.ondevicepersonalization.TrainingExampleRecord; 20 21 import java.util.List; 22 23 /** Factory for creating iterators */ 24 public class OdpExampleStoreIteratorFactory { 25 private static volatile OdpExampleStoreIteratorFactory sSingleton; 26 OdpExampleStoreIteratorFactory()27 private OdpExampleStoreIteratorFactory() {} 28 29 /** Returns an instance of OdpExampleStoreIteratorFactory */ getInstance()30 public static OdpExampleStoreIteratorFactory getInstance() { 31 if (null == sSingleton) { 32 synchronized (OdpExampleStoreIteratorFactory.class) { 33 if (null == sSingleton) { 34 sSingleton = new OdpExampleStoreIteratorFactory(); 35 } 36 } 37 } 38 return sSingleton; 39 } 40 41 /** Creates an OdpExampleStoreIterator */ createIterator(List<TrainingExampleRecord> exampleRecordList)42 public OdpExampleStoreIterator createIterator(List<TrainingExampleRecord> exampleRecordList) { 43 return new OdpExampleStoreIterator(exampleRecordList); 44 } 45 } 46