view rdf/PluginRDFIndexer.h @ 1833:21c792334c2e sensible-delimited-data-strings

Rewrite all the DelimitedDataString stuff so as to return vectors of individual cell strings rather than having the classes add the delimiters themselves. Rename accordingly to names based on StringExport. Take advantage of this in the CSV writer code so as to properly quote cells that contain delimiter characters.

/* -*- 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 SV_PLUGIN_RDF_INDEXER_H
#define SV_PLUGIN_RDF_INDEXER_H

#include <QString>
#include <QStringList>
#include <QMutex>
#include <map>
#include <set>

namespace Dataquay {
    class BasicStore;
}

class PluginRDFIndexer
{
public:
    static PluginRDFIndexer *getInstance();

    /**
     * Index all URLs obtained from index files defined in the current
     * settings.  In contrast to indexing URLs that are installed
     * locally alongside plugins, this is not done automatically
     * because it may incur significant processing and networking
     * effort.  It could be called from a background thread at
     * startup, for example.
     *
     * Note that this class has a single mutex, so other functions
     * will block if called from a different thread while this one is
     * running.
     */
    bool indexConfiguredURLs();

    bool indexURL(QString url); // in addition to "installed" URLs

    QString getURIForPluginId(QString pluginId);
    QString getIdForPluginURI(QString uri);

    QStringList getIndexedPluginIds();

    const Dataquay::BasicStore *getIndex();

    ~PluginRDFIndexer();

protected:
    PluginRDFIndexer();
    QMutex m_mutex;

    typedef std::map<QString, QString> StringMap;
    StringMap m_uriToIdMap;
    StringMap m_idToUriMap;

    void indexInstalledURLs();

    bool pullFile(QString path);
    bool pullURL(QString urlString);
    bool reindex();

    Dataquay::BasicStore *m_index;

    static PluginRDFIndexer *m_instance;
};

#endif