WebCore/storage/ChangeVersionWrapper.cpp
changeset 0 4f2f89ce4247
equal deleted inserted replaced
-1:000000000000 0:4f2f89ce4247
       
     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)