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 */
16package com.android.server.notification;
17
18import android.util.Slog;
19
20import java.util.Comparator;
21
22/**
23 * Sorts notifications by their global sort key.
24 */
25public class GlobalSortKeyComparator implements Comparator<NotificationRecord> {
26    private final static String TAG = "GlobalSortComp";
27
28    @Override
29    public int compare(NotificationRecord left, NotificationRecord right) {
30        if (left.getGlobalSortKey() == null) {
31            Slog.wtf(TAG, "Missing left global sort key: " + left);
32            return 1;
33        }
34        if (right.getGlobalSortKey() == null) {
35            Slog.wtf(TAG, "Missing right global sort key: " + right);
36            return  -1;
37        }
38        return left.getGlobalSortKey().compareTo(right.getGlobalSortKey());
39    }
40}
41