1 /*
2  * Copyright (C) 2016 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.contacts.model.account;
17 
18 import com.google.common.base.Objects;
19 
20 import java.util.Comparator;
21 
22 /**
23  * Orders accounts for display such that the default account is first
24  */
25 public class AccountComparator implements Comparator<AccountWithDataSet> {
26     private AccountWithDataSet mDefaultAccount;
27 
AccountComparator(AccountWithDataSet defaultAccount)28     public AccountComparator(AccountWithDataSet defaultAccount) {
29         mDefaultAccount = defaultAccount;
30     }
31 
32     @Override
compare(AccountWithDataSet a, AccountWithDataSet b)33     public int compare(AccountWithDataSet a, AccountWithDataSet b) {
34         if (Objects.equal(a.name, b.name) && Objects.equal(a.type, b.type)
35                 && Objects.equal(a.dataSet, b.dataSet)) {
36             return 0;
37         } else if (b.name == null || b.type == null) {
38             return -1;
39         } else if (a.name == null || a.type == null) {
40             return 1;
41         } else if (isWritableGoogleAccount(a) && a.equals(mDefaultAccount)) {
42             return -1;
43         } else if (isWritableGoogleAccount(b) && b.equals(mDefaultAccount)) {
44             return 1;
45         } else if (isWritableGoogleAccount(a) && !isWritableGoogleAccount(b)) {
46             return -1;
47         } else if (isWritableGoogleAccount(b) && !isWritableGoogleAccount(a)) {
48             return 1;
49         } else {
50             int diff = a.name.compareToIgnoreCase(b.name);
51             if (diff != 0) {
52                 return diff;
53             }
54             diff = a.type.compareToIgnoreCase(b.type);
55             if (diff != 0) {
56                 return diff;
57             }
58 
59             // Accounts without data sets get sorted before those that have them.
60             if (a.dataSet != null) {
61                 return b.dataSet == null ? 1 : a.dataSet.compareToIgnoreCase(b.dataSet);
62             } else {
63                 return -1;
64             }
65         }
66     }
67 
isWritableGoogleAccount(AccountWithDataSet account)68     private static boolean isWritableGoogleAccount(AccountWithDataSet account) {
69         return GoogleAccountType.ACCOUNT_TYPE.equals(account.type) && account.dataSet == null;
70     }
71 }
72