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      1 /*
      2  * Copyright (C) 2007 Apple Inc. All rights reserved.
      3  * Copyright (C) 2010 Google Inc. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *
      9  * 1.  Redistributions of source code must retain the above copyright
     10  *     notice, this list of conditions and the following disclaimer.
     11  * 2.  Redistributions in binary form must reproduce the above copyright
     12  *     notice, this list of conditions and the following disclaimer in the
     13  *     documentation and/or other materials provided with the distribution.
     14  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     15  *     its contributors may be used to endorse or promote products derived
     16  *     from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     19  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     21  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     22  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     25  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include "config.h"
     31 #include "SQLStatementSync.h"
     32 
     33 #if ENABLE(DATABASE)
     34 
     35 #include "DatabaseSync.h"
     36 #include "SQLException.h"
     37 #include "SQLResultSet.h"
     38 #include "SQLValue.h"
     39 #include "SQLiteDatabase.h"
     40 #include "SQLiteStatement.h"
     41 #include <wtf/PassRefPtr.h>
     42 #include <wtf/RefPtr.h>
     43 
     44 namespace WebCore {
     45 
     46 SQLStatementSync::SQLStatementSync(const String& statement, const Vector<SQLValue>& arguments, int permissions)
     47     : m_statement(statement)
     48     , m_arguments(arguments)
     49     , m_permissions(permissions)
     50 {
     51     ASSERT(!m_statement.isEmpty());
     52 }
     53 
     54 PassRefPtr<SQLResultSet> SQLStatementSync::execute(DatabaseSync* db, ExceptionCode& ec)
     55 {
     56     db->setAuthorizerPermissions(m_permissions);
     57 
     58     SQLiteDatabase* database = &db->sqliteDatabase();
     59 
     60     SQLiteStatement statement(*database, m_statement);
     61     int result = statement.prepare();
     62     if (result != SQLResultOk) {
     63         ec = (result == SQLResultInterrupt ? SQLException::DATABASE_ERR : SQLException::SYNTAX_ERR);
     64         return 0;
     65     }
     66 
     67     if (statement.bindParameterCount() != m_arguments.size()) {
     68         ec = (db->isInterrupted()? SQLException::DATABASE_ERR : SQLException::SYNTAX_ERR);
     69         return 0;
     70     }
     71 
     72     for (unsigned i = 0; i < m_arguments.size(); ++i) {
     73         result = statement.bindValue(i + 1, m_arguments[i]);
     74         if (result == SQLResultFull) {
     75             ec = SQLException::QUOTA_ERR;
     76             return 0;
     77         }
     78 
     79         if (result != SQLResultOk) {
     80             ec = SQLException::DATABASE_ERR;
     81             return 0;
     82         }
     83     }
     84 
     85     RefPtr<SQLResultSet> resultSet = SQLResultSet::create();
     86 
     87     // Step so we can fetch the column names.
     88     result = statement.step();
     89     if (result == SQLResultRow) {
     90         int columnCount = statement.columnCount();
     91         SQLResultSetRowList* rows = resultSet->rows();
     92 
     93         for (int i = 0; i < columnCount; i++)
     94             rows->addColumn(statement.getColumnName(i));
     95 
     96         do {
     97             for (int i = 0; i < columnCount; i++)
     98                 rows->addResult(statement.getColumnValue(i));
     99 
    100             result = statement.step();
    101         } while (result == SQLResultRow);
    102 
    103         if (result != SQLResultDone) {
    104             ec = SQLException::DATABASE_ERR;
    105             return 0;
    106         }
    107     } else if (result == SQLResultDone) {
    108         // Didn't find anything, or was an insert.
    109         if (db->lastActionWasInsert())
    110             resultSet->setInsertId(database->lastInsertRowID());
    111     } else if (result == SQLResultFull) {
    112         // Quota error, the delegate will be asked for more space and this statement might be re-run.
    113         ec = SQLException::QUOTA_ERR;
    114         return 0;
    115     } else {
    116         ec = SQLException::DATABASE_ERR;
    117         return 0;
    118     }
    119 
    120     resultSet->setRowsAffected(database->lastChanges());
    121     return resultSet.release();
    122 }
    123 
    124 } // namespace WebCore
    125 
    126 #endif // ENABLE(DATABASE)
    127