/*
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 * Copyright (C) 2013 Apple Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
 * met:
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 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
 * distribution.
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 * this software without specific prior written permission.
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#ifndef SQLTransactionBackendSync_h
#define SQLTransactionBackendSync_h

#include "modules/webdatabase/DatabaseBasicTypes.h"
#include "wtf/Forward.h"
#include "wtf/RefCounted.h"
#include "wtf/Vector.h"
#include "wtf/text/WTFString.h"

namespace WebCore {

class DatabaseSync;
class SQLResultSet;
class SQLTransactionClient;
class SQLTransactionSyncCallback;
class SQLValue;
class SQLiteTransaction;
class ExceptionState;

// Instances of this class should be created and used only on the worker's context thread.
class SQLTransactionBackendSync : public RefCounted<SQLTransactionBackendSync> {
public:
    ~SQLTransactionBackendSync();

    PassRefPtr<SQLResultSet> executeSQL(const String& sqlStatement, const Vector<SQLValue>& arguments, ExceptionState&);

    DatabaseSync* database() { return m_database.get(); }
    bool isReadOnly() const { return m_readOnly; }

    void begin(ExceptionState&);
    void execute(ExceptionState&);
    void commit(ExceptionState&);
    void rollback();

private:
    SQLTransactionBackendSync(DatabaseSync*, PassOwnPtr<SQLTransactionSyncCallback>, bool readOnly);

    RefPtr<DatabaseSync> m_database;
    OwnPtr<SQLTransactionSyncCallback> m_callback;
    bool m_readOnly;
    bool m_hasVersionMismatch;

    bool m_modifiedDatabase;
    OwnPtr<SQLTransactionClient> m_transactionClient;
    OwnPtr<SQLiteTransaction> m_sqliteTransaction;

    friend class SQLTransactionSync; // FIXME: Remove this once the front-end has been properly isolated.
};

} // namespace WebCore

#endif // SQLTransactionBackendSync_h