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 Computer, 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 "modules/webdatabase/ChangeVersionWrapper.h"
30
31 #include "modules/webdatabase/Database.h"
32 #include "modules/webdatabase/SQLError.h"
33 #include "wtf/PassRefPtr.h"
34 #include "wtf/RefPtr.h"
35
36 namespace blink {
37
ChangeVersionWrapper(const String & oldVersion,const String & newVersion)38 ChangeVersionWrapper::ChangeVersionWrapper(const String& oldVersion, const String& newVersion)
39 : m_oldVersion(oldVersion.isolatedCopy())
40 , m_newVersion(newVersion.isolatedCopy())
41 {
42 }
43
performPreflight(SQLTransactionBackend * transaction)44 bool ChangeVersionWrapper::performPreflight(SQLTransactionBackend* transaction)
45 {
46 ASSERT(transaction && transaction->database());
47
48 Database* database = transaction->database();
49
50 String actualVersion;
51 if (!database->getVersionFromDatabase(actualVersion)) {
52 int sqliteError = database->sqliteDatabase().lastError();
53 database->reportChangeVersionResult(1, SQLError::UNKNOWN_ERR, sqliteError);
54 m_sqlError = SQLErrorData::create(SQLError::UNKNOWN_ERR, "unable to read the current version",
55 sqliteError, database->sqliteDatabase().lastErrorMsg());
56 return false;
57 }
58
59 if (actualVersion != m_oldVersion) {
60 database->reportChangeVersionResult(2, SQLError::VERSION_ERR, 0);
61 m_sqlError = SQLErrorData::create(SQLError::VERSION_ERR, "current version of the database and `oldVersion` argument do not match");
62 return false;
63 }
64
65 return true;
66 }
67
performPostflight(SQLTransactionBackend * transaction)68 bool ChangeVersionWrapper::performPostflight(SQLTransactionBackend* transaction)
69 {
70 ASSERT(transaction && transaction->database());
71
72 Database* database = transaction->database();
73
74 if (!database->setVersionInDatabase(m_newVersion)) {
75 int sqliteError = database->sqliteDatabase().lastError();
76 database->reportChangeVersionResult(3, SQLError::UNKNOWN_ERR, sqliteError);
77 m_sqlError = SQLErrorData::create(SQLError::UNKNOWN_ERR, "unable to set new version in database",
78 sqliteError, database->sqliteDatabase().lastErrorMsg());
79 return false;
80 }
81
82 database->setExpectedVersion(m_newVersion);
83
84 database->reportChangeVersionResult(0, -1, 0); // OK
85 return true;
86 }
87
handleCommitFailedAfterPostflight(SQLTransactionBackend * transaction)88 void ChangeVersionWrapper::handleCommitFailedAfterPostflight(SQLTransactionBackend* transaction)
89 {
90 transaction->database()->setCachedVersion(m_oldVersion);
91 }
92
93 } // namespace blink
94