runtime/nepomuk/services/queryservice/queryservice.h

   1 /*
   2    Copyright (c) 2008 Sebastian Trueg <trueg@kde.org>
   3
   4    This library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public
   6    License version 2 as published by the Free Software Foundation.
   7
   8    This library is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11    Library General Public License for more details.
  12
  13    You should have received a copy of the GNU Library General Public License
  14    along with this library; see the file COPYING.LIB.  If not, write to
  15    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  16    Boston, MA 02110-1301, USA.
  17 */
  18
  19 #ifndef _NEPOMUK_VIRTUAL_FOLDER_SERVICE_H_
  20 #define _NEPOMUK_VIRTUAL_FOLDER_SERVICE_H_
  21
  22 #include <Nepomuk/Service>
  23
  24 #include <QtCore/QUrl>
  25 #include <QtCore/QVariant>
  26 #include <QtCore/QMultiHash>
  27
  28 class QDBusObjectPath;
  29 class QDBusMessage;
  30
  31
  32 namespace Nepomuk {
  33     namespace Search {
  34
  35         class Folder;
  36         class FolderConnection;
  37         class Query;
  38
  39         class QueryService : public Service
  40         {
  41             Q_OBJECT
  42             Q_CLASSINFO( "D-Bus Interface", "org.kde.nepomuk.QueryService" )
  43
  44         public:
  45             QueryService( QObject* parent, const QVariantList& );
  46             ~QueryService();
  47
  48             Soprano::Model* mainModel();
  49
  50             static QueryService* instance();
  51
  52         public Q_SLOTS:
  53             Q_SCRIPTABLE QDBusObjectPath query( const QString& query, const QStringList& props, const QDBusMessage& msg );
  54             Q_SCRIPTABLE QDBusObjectPath query( const Nepomuk::Search::Query& query, const QDBusMessage& msg );
  55
  56         private Q_SLOTS:
  57             void slotServiceOwnerChanged( const QString& serviceName,
  58                                           const QString&,
  59                                           const QString& newOwner );
  60             void slotFolderDestroyed( QObject* folder );
  61             void slotFolderConnectionDestroyed( QObject* conn );
  62
  63         private:
  64             /**
  65              * Creates a new folder or reuses an existing one.
  66              */
  67             Folder* getFolder( const Query& query );
  68
  69             static QueryService* s_instance;
  70
  71             QHash<Query, Folder*> m_openFolders;
  72             QHash<Folder*, Query> m_folderQueryHash;
  73             QMultiHash<QString, FolderConnection*> m_openConnections;      // maps from DBus service to connection
  74             QHash<FolderConnection*, QString> m_connectionDBusServiceHash; // maps connections to their using dbus service
  75
  76             int m_folderConnectionCnt; // only used for unique dbus object path generation
  77         };
  78     }
  79 }
  80
  81 #endif