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.adservices.service.measurement.reporting; 18 19 import android.annotation.NonNull; 20 import android.annotation.Nullable; 21 import android.net.Uri; 22 23 import org.json.JSONArray; 24 25 import java.util.ArrayList; 26 import java.util.Comparator; 27 import java.util.List; 28 import java.util.stream.Collectors; 29 30 /** Report related utility methods. */ 31 public class ReportUtil { 32 /** 33 * Prepares an alphabetical ordered list of attribution destinations for report JSON. If any 34 * elements are found to be null, they are added at last. 35 * 36 * @param destinations a list of attribution destinations 37 * @return an Object that is either String or JSONArray 38 */ 39 @Nullable serializeAttributionDestinations(@onNull List<Uri> destinations)40 public static Object serializeAttributionDestinations(@NonNull List<Uri> destinations) { 41 if (destinations.size() == 0) { 42 throw new IllegalArgumentException("Destinations list is empty"); 43 } 44 45 if (destinations.size() == 1) { 46 return destinations.get(0).toString(); 47 } else { 48 List<Uri> sortedDestinations = new ArrayList<>(destinations); 49 sortedDestinations.sort(Comparator.comparing(Uri::toString)); 50 return new JSONArray( 51 sortedDestinations.stream().map(Uri::toString).collect(Collectors.toList())); 52 } 53 } 54 } 55