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      1 /*
      2  * Copyright (C) 2010 Google Inc. All rights reserved.
      3  * Copyright (C) 2013 Apple 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 are
      7  * met:
      8  *
      9  *     * Redistributions of source code must retain the above copyright
     10  * notice, this list of conditions and the following disclaimer.
     11  *     * Redistributions in binary form must reproduce the above
     12  * copyright notice, this list of conditions and the following disclaimer
     13  * in the documentation and/or other materials provided with the
     14  * distribution.
     15  *     * Neither the name of Google Inc. nor the names of its
     16  * contributors may be used to endorse or promote products derived from
     17  * this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef SQLTransactionBackendSync_h
     33 #define SQLTransactionBackendSync_h
     34 
     35 #include "modules/webdatabase/DatabaseBasicTypes.h"
     36 #include "platform/heap/Handle.h"
     37 #include "wtf/Forward.h"
     38 #include "wtf/RefCounted.h"
     39 #include "wtf/Vector.h"
     40 #include "wtf/text/WTFString.h"
     41 
     42 namespace WebCore {
     43 
     44 class DatabaseSync;
     45 class SQLResultSet;
     46 class SQLTransactionClient;
     47 class SQLTransactionSyncCallback;
     48 class SQLValue;
     49 class SQLiteTransaction;
     50 class ExceptionState;
     51 
     52 // Instances of this class should be created and used only on the worker's context thread.
     53 class SQLTransactionBackendSync : public RefCountedWillBeGarbageCollectedFinalized<SQLTransactionBackendSync> {
     54 public:
     55     ~SQLTransactionBackendSync();
     56     void trace(Visitor*);
     57 
     58     PassRefPtrWillBeRawPtr<SQLResultSet> executeSQL(const String& sqlStatement, const Vector<SQLValue>& arguments, ExceptionState&);
     59 
     60     DatabaseSync* database() { return m_database.get(); }
     61 
     62     void begin(ExceptionState&);
     63     void execute(ExceptionState&);
     64     void commit(ExceptionState&);
     65     void rollback();
     66     void rollbackIfInProgress();
     67 
     68 private:
     69     SQLTransactionBackendSync(DatabaseSync*, PassOwnPtr<SQLTransactionSyncCallback>, bool readOnly);
     70 
     71     RefPtrWillBeMember<DatabaseSync> m_database;
     72     OwnPtr<SQLTransactionSyncCallback> m_callback;
     73     bool m_readOnly;
     74     bool m_hasVersionMismatch;
     75 
     76     bool m_modifiedDatabase;
     77     OwnPtr<SQLTransactionClient> m_transactionClient;
     78     OwnPtr<SQLiteTransaction> m_sqliteTransaction;
     79 
     80     friend class SQLTransactionSync; // FIXME: Remove this once the front-end has been properly isolated.
     81 };
     82 
     83 } // namespace WebCore
     84 
     85 #endif // SQLTransactionBackendSync_h
     86