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#if ENABLE(SQL_DATABASE) 32 33#include "Database.h" 34#include "SQLError.h" 35#include <wtf/PassRefPtr.h> 36#include <wtf/RefPtr.h> 37 38namespace WebCore { 39 40ChangeVersionWrapper::ChangeVersionWrapper(const String& oldVersion, const String& newVersion) 41 : m_oldVersion(oldVersion.isolatedCopy()) 42 , m_newVersion(newVersion.isolatedCopy()) 43{ 44} 45 46bool ChangeVersionWrapper::performPreflight(SQLTransactionBackend* transaction) 47{ 48 ASSERT(transaction && transaction->database()); 49 50 DatabaseBackend* database = transaction->database(); 51 52 String actualVersion; 53 if (!database->getVersionFromDatabase(actualVersion)) { 54 int sqliteError = database->sqliteDatabase().lastError(); 55 m_sqlError = SQLError::create(SQLError::UNKNOWN_ERR, "unable to read the current version", 56 sqliteError, database->sqliteDatabase().lastErrorMsg()); 57 return false; 58 } 59 60 if (actualVersion != m_oldVersion) { 61 m_sqlError = SQLError::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 68bool ChangeVersionWrapper::performPostflight(SQLTransactionBackend* transaction) 69{ 70 ASSERT(transaction && transaction->database()); 71 72 DatabaseBackend* database = transaction->database(); 73 74 if (!database->setVersionInDatabase(m_newVersion)) { 75 int sqliteError = database->sqliteDatabase().lastError(); 76 m_sqlError = SQLError::create(SQLError::UNKNOWN_ERR, "unable to set new version in database", 77 sqliteError, database->sqliteDatabase().lastErrorMsg()); 78 return false; 79 } 80 81 database->setExpectedVersion(m_newVersion); 82 return true; 83} 84 85void ChangeVersionWrapper::handleCommitFailedAfterPostflight(SQLTransactionBackend* transaction) 86{ 87 transaction->database()->setCachedVersion(m_oldVersion); 88} 89 90} // namespace WebCore 91 92#endif // ENABLE(SQL_DATABASE) 93