1 /*

     2  * Copyright (C) 2007 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 "ChangeVersionWrapper.h"

    30 

    31 #if ENABLE(DATABASE)

    32 #include "Database.h"

    33 #include "SQLError.h"

    34 #include <wtf/PassRefPtr.h>

    35 #include <wtf/RefPtr.h>

    36 

    37 namespace WebCore {

    38 

    39 ChangeVersionWrapper::ChangeVersionWrapper(const String& oldVersion, const String& newVersion)

    40     : m_oldVersion(oldVersion.crossThreadString())

    41     , m_newVersion(newVersion.crossThreadString())

    42 {

    43 }

    44 

    45 bool ChangeVersionWrapper::performPreflight(SQLTransaction* transaction)

    46 {

    47     ASSERT(transaction && transaction->database());

    48 

    49     String actualVersion;

    50 

    51     if (!transaction->database()->getVersionFromDatabase(actualVersion)) {

    52         LOG_ERROR("Unable to retrieve actual current version from database");

    53         m_sqlError = SQLError::create(SQLError::UNKNOWN_ERR, "unable to verify current version of database");

    54         return false;

    55     }

    56 

    57     if (actualVersion != m_oldVersion) {

    58         LOG_ERROR("Old version doesn't match actual version");

    59         m_sqlError = SQLError::create(SQLError::VERSION_ERR, "current version of the database and `oldVersion` argument do not match");

    60         return false;

    61     }

    62 

    63     return true;

    64 }

    65 

    66 bool ChangeVersionWrapper::performPostflight(SQLTransaction* transaction)

    67 {

    68     ASSERT(transaction && transaction->database());

    69 

    70     if (!transaction->database()->setVersionInDatabase(m_newVersion)) {

    71         LOG_ERROR("Unable to set new version in database");

    72         m_sqlError = SQLError::create(SQLError::UNKNOWN_ERR, "unable to set new version in database");

    73         return false;

    74     }

    75 

    76     transaction->database()->setExpectedVersion(m_newVersion);

    77 

    78     return true;

    79 }

    80 

    81 } // namespace WebCore

    82 

    83 #endif // ENABLE(DATABASE)