1 | /* |
2 | * Copyright (C) 2007, 2013 Apple Inc. All rights reserved. |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions |
6 | * are met: |
7 | * |
8 | * 1. Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
13 | * 3. Neither the name of Apple Inc. ("Apple") nor the names of |
14 | * its contributors may be used to endorse or promote products derived |
15 | * from this software without specific prior written permission. |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
18 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
20 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
22 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
23 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
24 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | #include "config.h" |
29 | #include "ChangeVersionWrapper.h" |
30 | |
31 | #include "Database.h" |
32 | #include "SQLError.h" |
33 | #include "SQLTransactionBackend.h" |
34 | #include <wtf/RefPtr.h> |
35 | |
36 | namespace WebCore { |
37 | |
38 | ChangeVersionWrapper::ChangeVersionWrapper(const String& oldVersion, const String& newVersion) |
39 | : m_oldVersion(oldVersion.isolatedCopy()) |
40 | , m_newVersion(newVersion.isolatedCopy()) |
41 | { |
42 | } |
43 | |
44 | bool ChangeVersionWrapper::performPreflight(SQLTransaction& transaction) |
45 | { |
46 | Database& database = transaction.database(); |
47 | |
48 | String actualVersion; |
49 | if (!database.getVersionFromDatabase(actualVersion)) { |
50 | int sqliteError = database.sqliteDatabase().lastError(); |
51 | m_sqlError = SQLError::create(SQLError::UNKNOWN_ERR, "unable to read the current version" , sqliteError, database.sqliteDatabase().lastErrorMsg()); |
52 | return false; |
53 | } |
54 | |
55 | if (actualVersion != m_oldVersion) { |
56 | m_sqlError = SQLError::create(SQLError::VERSION_ERR, "current version of the database and `oldVersion` argument do not match" ); |
57 | return false; |
58 | } |
59 | |
60 | return true; |
61 | } |
62 | |
63 | bool ChangeVersionWrapper::performPostflight(SQLTransaction& transaction) |
64 | { |
65 | Database& database = transaction.database(); |
66 | |
67 | if (!database.setVersionInDatabase(m_newVersion)) { |
68 | int sqliteError = database.sqliteDatabase().lastError(); |
69 | m_sqlError = SQLError::create(SQLError::UNKNOWN_ERR, "unable to set new version in database" , sqliteError, database.sqliteDatabase().lastErrorMsg()); |
70 | return false; |
71 | } |
72 | |
73 | database.setExpectedVersion(m_newVersion); |
74 | return true; |
75 | } |
76 | |
77 | void ChangeVersionWrapper::handleCommitFailedAfterPostflight(SQLTransaction& transaction) |
78 | { |
79 | transaction.database().setCachedVersion(m_oldVersion); |
80 | } |
81 | |
82 | } // namespace WebCore |
83 | |