qsparqlsparqlconnection_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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#ifndef QSPARQLSPARQLCONNECTION_P_H
#define QSPARQLSPARQLCONNECTION_P_H
 
#include <qsparqlquerymodel.h>
 
#include <QtCore/qglobal.h>
#include <QtCore/qdebug.h>
 
#ifdef QT_VERSION_5
#include <QtQml/qqml.h>
#include <QQmlParserStatus>
#define QDeclarativeParserStatus QQmlParserStatus
#else
#include <QtDeclarative/qdeclarative.h>
#include <QDeclarativeParserStatus>
#endif
 
QT_BEGIN_HEADER
 
QT_BEGIN_NAMESPACE
 
QT_MODULE(Sparql)
 
class SparqlQuery;
class SparqlConnectionOptions;
 
class Q_SPARQL_EXPORT SparqlConnection : public QSparqlConnection,
                                         public QDeclarativeParserStatus
{
    Q_OBJECT
    Q_ENUMS(Status)
    Q_PROPERTY(Status status READ status NOTIFY statusChanged)
    Q_PROPERTY(QString driver WRITE setDriver READ getDriver)
    Q_PROPERTY(QVariant result READ getResult NOTIFY resultReady)
    Q_PROPERTY(SparqlConnectionOptions * options WRITE setOptions READ getOptions)
    Q_CLASSINFO("DefaultProperty", "driver")
    Q_INTERFACES(QDeclarativeParserStatus)
 
public:
    SparqlConnection();
    ~SparqlConnection() {}
 
    enum Status { Null, Ready, Loading, Error };
 
    void classBegin();
    void componentComplete();
 
    Q_INVOKABLE QVariant select(QString query, bool async = false);
    Q_INVOKABLE QVariant select(QString query, QVariant boundValues, bool async = false);
    Q_INVOKABLE QVariant ask(QString query, bool async = false);
    Q_INVOKABLE QVariant ask(QString query, QVariant boundValues, bool async = false);
    Q_INVOKABLE QVariant update(QString query, bool async = false);
    Q_INVOKABLE QVariant update(QString query, QVariant boundValues, bool async = false);
    Q_INVOKABLE QVariant construct(QString query, bool async = false);
    Q_INVOKABLE QVariant construct(QString query, QVariant boundValues, bool async = false);
    Q_INVOKABLE QString errorString() const;
 
Q_SIGNALS:
    void statusChanged(SparqlConnection::Status);
    void resultReady(QVariant);
    void onCompleted();
 
private Q_SLOTS:
    void onResultFinished();
 
private:
    QString driverName;
    QString lastErrorMessage;
    QSparqlResult *asyncResult; // for async queries
    QVariant lastResult;
    SparqlConnectionOptions *options;
    Status connectionStatus;
 
    QVariant resultToVariant(QSparqlResult *result);
    QVariant runQuery(QSparqlQuery query, bool async);
    QVariant getResult();
    void changeStatus(SparqlConnection::Status);
    bool bindValues(QSparqlQuery *query, QVariant boundValues);
    // property methods
    void setOptions(SparqlConnectionOptions* options);
    SparqlConnectionOptions* getOptions();
    void setDriver(QString driverName);
    QString getDriver();
    Status status();
};
 
QT_END_NAMESPACE
 
QT_END_HEADER
 
#endif