qsparql_virtuoso_p.h

/****************************************************************************
**
** Copyright (C) 2010-2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (ivan.frade@nokia.com)
**
** This file is part of the QtSparql module (not yet part of the Qt Toolkit).
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** $QT_BEGIN_LICENSE:LGPL$
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** License version 2.1 as published by the Free Software Foundation and
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** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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#ifndef QSPARQL_VIRTUOSO_H
#define QSPARQL_VIRTUOSO_H
 
#include <QtSparql/private/qsparqldriver_p.h>
#include <QtSparql/qsparqlresult.h>
 
#if defined (Q_OS_WIN32)
#include <QtCore/qt_windows.h>
#endif
 
#ifdef QT_PLUGIN
#define Q_EXPORT_SPARQLDRIVER_VIRTUOSO
#else
#define Q_EXPORT_SPARQLDRIVER_VIRTUOSO Q_SPARQL_EXPORT
#endif
 
#ifdef Q_OS_UNIX
#define HAVE_LONG_LONG 1 // force UnixODBC NOT to fall back to a struct for BIGINTs
#endif
 
#if defined(Q_CC_BOR)
// workaround for Borland to make sure that SQLBIGINT is defined
#  define _MSC_VER 900
#endif
#include <sql.h>
#if defined(Q_CC_BOR)
#  undef _MSC_VER
#endif
 
//#ifndef Q_ODBC_VERSION_2
//#include <sqlucode.h>
//#endif
 
#include <sqlext.h>
 
QT_BEGIN_HEADER
 
QT_BEGIN_NAMESPACE
 
class QVirtuosoResultPrivate;
class QVirtuosoAsyncResultPrivate;
class QVirtuosoDriverPrivate;
class QVirtuosoDriver;
 
class QVirtuosoResult : public QSparqlResult
{
    Q_OBJECT
public:
    QVirtuosoResult(const QVirtuosoDriver * db, QVirtuosoDriverPrivate* p,
                    const QString& query, QSparqlQuery::StatementType type,
                    const QString& prefixes);
    virtual ~QVirtuosoResult();
 
    QVariant handle() const;
    virtual bool runQuery();
 
    bool next();
    QSparqlBinding binding(int field) const;
    QVariant value(int field) const;
    QSparqlResultRow current() const;
 
    bool isFinished() const;
 
    bool hasFeature(QSparqlResult::Feature feature) const;
    virtual void terminate() {}
protected:
    QVirtuosoResultPrivate *d;
};
 
class QVirtuosoAsyncResult : public QVirtuosoResult
{
    Q_OBJECT
    friend class QVirtuosoFetcherPrivate;
public:
    QVirtuosoAsyncResult(const QVirtuosoDriver * db, QVirtuosoDriverPrivate* p,
                    const QString& query, QSparqlQuery::StatementType type,
                    const QString& prefixes);
    virtual ~QVirtuosoAsyncResult();
 
    Q_INVOKABLE void startFetcher();
    bool runQuery();
 
    bool next();
    QSparqlBinding binding(int field) const;
    QVariant value(int field) const;
    QSparqlResultRow current() const;
    int size() const;
 
    void waitForFinished();
    bool isFinished() const;
 
    bool hasFeature(QSparqlResult::Feature feature) const;
    void terminate();
private:
    bool fetchNextResult();
    bool fetchBoolResult();
    bool fetchGraphResult();
    QVirtuosoAsyncResultPrivate *da;
};
 
class Q_EXPORT_SPARQLDRIVER_VIRTUOSO QVirtuosoDriver : public QSparqlDriver
{
    Q_OBJECT
public:
    explicit QVirtuosoDriver(QObject *parent=0);
    QVirtuosoDriver(SQLHANDLE env, SQLHANDLE con, QObject * parent=0);
    virtual ~QVirtuosoDriver();
    bool hasFeature(QSparqlConnection::Feature f) const;
    bool hasError() const;
    void close();
    QVariant handle() const;
    bool open(const QSparqlConnectionOptions& options);
    QVirtuosoResult* exec(const QString& query, QSparqlQuery::StatementType type, const QSparqlQueryOptions& options);
 
protected:
    bool beginTransaction();
    bool commitTransaction();
    bool rollbackTransaction();
 
private:
    void init();
    bool endTrans();
    void cleanup();
    QVirtuosoAsyncResult* asyncExec(const QString& query, QSparqlQuery::StatementType type);
    QVirtuosoResult* syncExec(const QString& query, QSparqlQuery::StatementType type);
    QVirtuosoDriverPrivate* d;
    friend class QVirtuosoResultPrivate;
    friend class QVirtuosoAsyncResultPrivate;
};
 
QT_END_NAMESPACE
 
QT_END_HEADER
 
#endif // QSPARQL_VIRTUOSO_H