blob: 1ca8116526c99eaf64e83cc603a1b68180b35db4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/*******************************************************************************
* Copyright (C) 2013 Google Inc.
* Licensed to The Android Open Source Project.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package com.android.mail.browse;
import android.database.Cursor;
import android.database.CursorWrapper;
public interface ConversationCursorOperationListener {
/**
* Marks all contents of this cursor as seen.
*/
void markContentsSeen();
/**
* Empties the folder of all messages, if possible.
*/
void emptyFolder();
public class OperationHelper {
/**
* Invokes {@link ConversationCursorOperationListener#markContentsSeen(Cursor)} on the
* specified {@link Cursor}, recursively calls {@link #markContentsSeen(Cursor)} on a
* wrapped cursor, or returns.
*/
public static void markContentsSeen(final Cursor cursor) {
if (cursor == null) {
return;
}
if (cursor instanceof ConversationCursorOperationListener) {
((ConversationCursorOperationListener) cursor).markContentsSeen();
} else if (cursor instanceof CursorWrapper) {
markContentsSeen(((CursorWrapper) cursor).getWrappedCursor());
}
}
/**
* Invokes {@link ConversationCursorOperationListener#emptyFolder(Cursor)} on the
* specified {@link Cursor}, recursively calls {@link #emptyFolder(Cursor)} on a
* wrapped cursor, or returns.
*/
public static void emptyFolder(final Cursor cursor) {
if (cursor == null) {
return;
}
if (cursor instanceof ConversationCursorOperationListener) {
((ConversationCursorOperationListener) cursor).emptyFolder();
} else if (cursor instanceof CursorWrapper) {
emptyFolder(((CursorWrapper) cursor).getWrappedCursor());
}
}
}
}
|