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
36namespace WebCore {
37
38ChangeVersionWrapper::ChangeVersionWrapper(const String& oldVersion, const String& newVersion)
39 : m_oldVersion(oldVersion.isolatedCopy())
40 , m_newVersion(newVersion.isolatedCopy())
41{
42}
43
44bool 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
63bool 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
77void ChangeVersionWrapper::handleCommitFailedAfterPostflight(SQLTransaction& transaction)
78{
79 transaction.database().setCachedVersion(m_oldVersion);
80}
81
82} // namespace WebCore
83