runtime/nepomuk/services/migration1/migration1.cpp

   1 /* This file is part of the KDE Project
   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 #include "migration1.h"
  20
  21 #include <Soprano/Model>
  22 #include <Soprano/Node>
  23 #include <Soprano/Statement>
  24 #include <Soprano/StatementIterator>
  25 #include <Soprano/Vocabulary/NAO>
  26
  27 #include <kpluginfactory.h>
  28 #include <kpluginloader.h>
  29
  30
  31 Nepomuk::Migration1::Migration1( QObject* parent, const QList<QVariant>& )
  32     : Service( parent )
  33 {
  34     // we just do our data updating and afterwards we idle
  35
  36     // 1. nao:label
  37     // ====================================
  38     QList<Soprano::Statement> oldLabelStatements
  39         = mainModel()->listStatements( Soprano::Node(),
  40                                        QUrl::fromEncoded( "http://www.semanticdesktop.org/ontologies/2007/08/15/nao#label" ),
  41                                        Soprano::Node() ).allStatements();
  42
  43     // update the data
  44     // (keep all metametadata like graphs and creation dates since the actual data does not change)
  45     foreach( Soprano::Statement s, oldLabelStatements ) {
  46         s.setPredicate( Soprano::Vocabulary::NAO::prefLabel() );
  47         mainModel()->addStatement( s );
  48     }
  49
  50     mainModel()->removeStatements( oldLabelStatements );
  51
  52
  53     // 2. nao:rating
  54     // ====================================
  55     QList<Soprano::Statement> oldRatingStatements
  56         = mainModel()->listStatements( Soprano::Node(),
  57                                        QUrl::fromEncoded( "http://www.semanticdesktop.org/ontologies/2007/08/15/nao#rating" ),
  58                                        Soprano::Node() ).allStatements();
  59
  60     // update the data
  61     // (keep all metametadata like graphs and creation dates since the actual data does not change)
  62     foreach( Soprano::Statement s, oldRatingStatements ) {
  63         s.setPredicate( Soprano::Vocabulary::NAO::numericRating() );
  64         mainModel()->addStatement( s );
  65     }
  66
  67     mainModel()->removeStatements( oldLabelStatements );
  68 }
  69
  70
  71 Nepomuk::Migration1::~Migration1()
  72 {
  73 }
  74
  75 NEPOMUK_EXPORT_SERVICE( Nepomuk::Migration1, "nepomukmigration1" )
  76
  77 #include "migration1.moc"