1 /* 2 * Copyright (C) 2014 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 package com.android.server.notification; 17 18 import java.util.Comparator; 19 20 /** 21 * Sorts notifications by their global sort key. 22 */ 23 public class GlobalSortKeyComparator implements Comparator<NotificationRecord> { 24 @Override compare(NotificationRecord left, NotificationRecord right)25 public int compare(NotificationRecord left, NotificationRecord right) { 26 if (left.getGlobalSortKey() == null) { 27 throw new IllegalStateException("Missing left global sort key: " + left); 28 } 29 if (right.getGlobalSortKey() == null) { 30 throw new IllegalStateException("Missing right global sort key: " + right); 31 } 32 return left.getGlobalSortKey().compareTo(right.getGlobalSortKey()); 33 } 34 } 35