SQLTransaction.h   [plain text]

/*
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 *     notice, this list of conditions and the following disclaimer.
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 *     its contributors may be used to endorse or promote products derived
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#ifndef SQLTransaction_h
#define SQLTransaction_h

#if ENABLE(SQL_DATABASE)

#include "AbstractSQLTransaction.h"
#include "SQLCallbackWrapper.h"
#include "SQLStatement.h"
#include "SQLTransactionStateMachine.h"
#include <wtf/PassRefPtr.h>
#include <wtf/RefPtr.h>

namespace WebCore {

class AbstractSQLTransactionBackend;
class Database;
class SQLError;
class SQLStatementCallback;
class SQLStatementErrorCallback;
class SQLTransactionCallback;
class SQLTransactionErrorCallback;
class SQLValue;
class VoidCallback;

class SQLTransaction : public SQLTransactionStateMachine<SQLTransaction>, public AbstractSQLTransaction {
public:
    static PassRefPtr<SQLTransaction> create(Database*, PassRefPtr<SQLTransactionCallback>,
        PassRefPtr<VoidCallback> successCallback, PassRefPtr<SQLTransactionErrorCallback>,
        bool readOnly);

    void performPendingCallback();

    void executeSQL(const String& sqlStatement, const Vector<SQLValue>& arguments,
        PassRefPtr<SQLStatementCallback>, PassRefPtr<SQLStatementErrorCallback>, ExceptionCode&);

    Database* database() { return m_database.get(); }

private:
    SQLTransaction(Database*, PassRefPtr<SQLTransactionCallback>,
        PassRefPtr<VoidCallback> successCallback, PassRefPtr<SQLTransactionErrorCallback>,
        bool readOnly);

    void clearCallbackWrappers();

    // APIs called from the backend published via AbstractSQLTransaction:
    virtual void requestTransitToState(SQLTransactionState) override;
    virtual bool hasCallback() const override;
    virtual bool hasSuccessCallback() const override;
    virtual bool hasErrorCallback() const override;
    virtual void setBackend(AbstractSQLTransactionBackend*) override;

    // State Machine functions:
    virtual StateFunction stateFunctionFor(SQLTransactionState) override;
    bool computeNextStateAndCleanupIfNeeded();

    // State functions:
    SQLTransactionState deliverTransactionCallback();
    SQLTransactionState deliverTransactionErrorCallback();
    SQLTransactionState deliverStatementCallback();
    SQLTransactionState deliverQuotaIncreaseCallback();
    SQLTransactionState deliverSuccessCallback();

    SQLTransactionState unreachableState();
    SQLTransactionState sendToBackendState();

    SQLTransactionState nextStateForTransactionError();

    RefPtr<Database> m_database;
    RefPtr<AbstractSQLTransactionBackend> m_backend;
    SQLCallbackWrapper<SQLTransactionCallback> m_callbackWrapper;
    SQLCallbackWrapper<VoidCallback> m_successCallbackWrapper;
    SQLCallbackWrapper<SQLTransactionErrorCallback> m_errorCallbackWrapper;

    bool m_executeSqlAllowed;
    RefPtr<SQLError> m_transactionError;

    bool m_readOnly;
};

} // namespace WebCore

#endif

#endif // SQLTransaction_h