view rdf/RDFImporter.h @ 492:23945cdd7161

* Update RDF query stuff again so as to set up a temporary datastore
  each time we want to query over an rdf file, instead of using rasqal
  against the file.  Seems the only way to avoid threading and storage
  management issues when trying to load from a single-source file and
  perform queries against our main datastore at the same time.  Maybe.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2008 QMUL.
   
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef _RDF_IMPORTER_H_
#define _RDF_IMPORTER_H_

#include <QObject>
#include <QString>

#include <vector>

class Model;
class RDFImporterImpl;
class ProgressReporter;

class RDFImporter : public QObject
{
    Q_OBJECT

public:
    /**
     * Return the file extensions that we have data file readers for,
     * in a format suitable for use with QFileDialog.  For example,
     * "*.rdf *.n3".
     */
    static QString getKnownExtensions();

    RDFImporter(QString url, int sampleRate = 0);
    virtual ~RDFImporter();

    void setSampleRate(int sampleRate);

    bool isOK();
    QString getErrorString() const;

    QString getAudioAvailableUrl() const;

    std::vector<Model *> getDataModels(ProgressReporter *reporter);

    enum RDFDocumentType {
        AudioRefAndAnnotations,
        Annotations,
        AudioRef,
        OtherDocument
    };

    static RDFDocumentType identifyDocumentType(QString url);

protected:
    RDFImporterImpl *m_d;
};

#endif