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	diff --git a/nepomuk/core/resource.cpp b/nepomuk/core/resource.cpp
	index a4ab756d32..75a41a98bc 100644
	--- a/nepomuk/core/resource.cpp
	+++ b/nepomuk/core/resource.cpp
	@@ -1,964 +1,963 @@
	/*
	* This file is part of the Nepomuk KDE project.
	* Copyright (C) 2006-2010 Sebastian Trueg <trueg@kde.org>
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Library General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Library General Public License for more details.
	*
	* You should have received a copy of the GNU Library General Public License
	* along with this library; see the file COPYING.LIB. If not, write to
	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*/

	#include "resource.h"
	#include "resourcedata.h"
	#include "resourcemanager.h"
	#include "resourcemanager_p.h"
	#include "tools.h"
	#include "tag.h"
	#include "pimo.h"
	#include "thing.h"
	#include "file.h"
	#include "property.h"
	#include "nfo.h"
	#include "nie.h"
	#include "nco.h"
	#include "nuao.h"

	#include "klocale.h"
	#include "kdebug.h"
	#include "kurl.h"
	#include "kmimetype.h"

	#include <Soprano/Vocabulary/NAO>
	#include <Soprano/Vocabulary/Xesam>
	#include <Soprano/Vocabulary/RDFS>
	#include <Soprano/Model>
	#include <Soprano/QueryResultIterator>


	Nepomuk::Resource::Resource()
	{
	QMutexLocker lock( &ResourceManager::instance()->d->mutex );
	m_data = ResourceManager::instance()->d->data( QUrl(), QUrl() );
	if ( m_data )
	m_data->ref( this );
	}


	Nepomuk::Resource::Resource( ResourceManager* manager )
	{
	if(!manager)
	manager = ResourceManager::instance();
	QMutexLocker lock( &manager->d->mutex );
	m_data = manager->d->data( QUrl(), QUrl() );
	if ( m_data )
	m_data->ref( this );
	}


	Nepomuk::Resource::Resource( const Nepomuk::Resource& res )
	{
	QMutexLocker lock( &res.m_data->rm()->mutex );
	m_data = res.m_data;
	if ( m_data )
	m_data->ref( this );
	}


	Nepomuk::Resource::Resource( const QString& uri, const QUrl& type )
	{
	QMutexLocker lock( &ResourceManager::instance()->d->mutex );
	m_data = ResourceManager::instance()->d->data( uri, type );
	if ( m_data )
	m_data->ref( this );
	}


	Nepomuk::Resource::Resource( const QString& uri, const QUrl& type, ResourceManager* manager )
	{
	if(!manager)
	manager = ResourceManager::instance();
	QMutexLocker lock( &manager->d->mutex );
	m_data = manager->d->data( uri, type );
	if ( m_data )
	m_data->ref( this );
	}


	#ifndef KDE_NO_DEPRECATED
	Nepomuk::Resource::Resource( const QString& uri, const QString& type )
	{
	QMutexLocker lock( &ResourceManager::instance()->d->mutex );
	m_data = ResourceManager::instance()->d->data( uri, type );
	if ( m_data )
	m_data->ref( this );
	}
	#endif


	Nepomuk::Resource::Resource( const QUrl& uri, const QUrl& type )
	{
	QMutexLocker lock( &ResourceManager::instance()->d->mutex );
	m_data = ResourceManager::instance()->d->data( uri, type );
	if ( m_data )
	m_data->ref( this );
	}


	Nepomuk::Resource::Resource( const QUrl& uri, const QUrl& type, ResourceManager* manager )
	{
	if(!manager)
	manager = ResourceManager::instance();
	QMutexLocker lock( &manager->d->mutex );
	m_data = manager->d->data( uri, type );
	if ( m_data )
	m_data->ref( this );
	}


	Nepomuk::Resource::Resource( Nepomuk::ResourceData* data )
	{
	QMutexLocker lock( &data->rm()->mutex );
	m_data = data;
	if ( m_data )
	m_data->ref( this );
	}


	Nepomuk::Resource::~Resource()
	{
	if ( m_data ) {
	QMutexLocker lock(&m_data->rm()->mutex);
	m_data->deref( this );
	if ( m_data->rm()->shouldBeDeleted( m_data ) )
	delete m_data;
	}
	}


	Nepomuk::Resource& Nepomuk::Resource::operator=( const Resource& res )
	{
	if( m_data != res.m_data ) {
	QMutexLocker lock(&m_data->rm()->mutex);
	if ( m_data && !m_data->deref( this ) && m_data->rm()->shouldBeDeleted( m_data ) ) {
	delete m_data;
	}
	m_data = res.m_data;
	if ( m_data )
	m_data->ref( this );
	}

	return *this;
	}


	Nepomuk::Resource& Nepomuk::Resource::operator=( const QUrl& res )
	{
	return operator=( Resource( res ) );
	}


	Nepomuk::ResourceManager* Nepomuk::Resource::manager() const
	{
	return m_data->rm()->m_manager;
	}


	#ifndef KDE_NO_DEPRECATED
	QString Nepomuk::Resource::uri() const
	{
	return resourceUri().toString();
	}
	#endif


	QUrl Nepomuk::Resource::resourceUri() const
	{
	if ( m_data ) {
	determineFinalResourceData();
	return m_data->uri();
	}
	else {
	return QUrl();
	}
	}


	#ifndef KDE_NO_DEPRECATED
	QString Nepomuk::Resource::type() const
	{
	return resourceType().toString();
	}
	#endif


	QUrl Nepomuk::Resource::resourceType() const
	{
	determineFinalResourceData();
	return m_data->type();
	}


	QList<QUrl> Nepomuk::Resource::types() const
	{
	determineFinalResourceData();
	return m_data->allTypes();
	}


	void Nepomuk::Resource::setTypes( const QList<QUrl>& types )
	{
	determineFinalResourceData();
	m_data->setTypes( types );
	}


	void Nepomuk::Resource::addType( const QUrl& type )
	{
	QList<QUrl> tl = types();
	if( !tl.contains( type ) )
	setTypes( tl << type );
	}


	bool Nepomuk::Resource::hasType( const QUrl& typeUri ) const
	{
	determineFinalResourceData();
	return m_data->hasType( typeUri );
	}


	QString Nepomuk::Resource::className() const
	{
	return resourceType().toString().section( QRegExp( "[#:]" ), -1 );
	}


	QHash<QUrl, Nepomuk::Variant> Nepomuk::Resource::properties() const
	{
	determineFinalResourceData();
	return m_data->allProperties();
	}


	#ifndef KDE_NO_DEPRECATED
	QHash<QString, Nepomuk::Variant> Nepomuk::Resource::allProperties() const
	{
	QHash<QString, Nepomuk::Variant> pl;
	QHash<QUrl, Nepomuk::Variant> p = properties();
	QHash<QUrl, Nepomuk::Variant>::const_iterator end = p.constEnd();
	for ( QHash<QUrl, Nepomuk::Variant>::const_iterator it = p.constBegin();
	it != end; ++it ) {
	pl.insert( it.key().toString(), it.value() );
	}
	return pl;
	}
	#endif


	bool Nepomuk::Resource::hasProperty( const QUrl& uri ) const
	{
	determineFinalResourceData();
	return m_data->hasProperty( uri );
	}


	bool Nepomuk::Resource::hasProperty( const Types::Property& p, const Variant& v ) const
	{
	determineFinalResourceData();
	return m_data->hasProperty( p.uri(), v );
	}


	#ifndef KDE_NO_DEPRECATED
	bool Nepomuk::Resource::hasProperty( const QString& uri ) const
	{
	return hasProperty( QUrl( uri ) );
	}
	#endif


	#ifndef KDE_NO_DEPRECATED
	Nepomuk::Variant Nepomuk::Resource::property( const QString& uri ) const
	{
	return property( QUrl( uri ) );
	}
	#endif


	Nepomuk::Variant Nepomuk::Resource::property( const QUrl& uri ) const
	{
	determineFinalResourceData();
	return m_data->property( uri );
	}


	#ifndef KDE_NO_DEPRECATED
	void Nepomuk::Resource::setProperty( const QString& uri, const Nepomuk::Variant& value )
	{
	setProperty( QUrl( uri ), value );
	}
	#endif


	void Nepomuk::Resource::addProperty( const QUrl& uri, const Variant& value )
	{
	- Variant v = property( uri );
	- v.append( value );
	- setProperty( uri, v );
	+ determineFinalResourceData();
	+ m_data->addProperty( uri, value );
	}


	void Nepomuk::Resource::setProperty( const QUrl& uri, const Nepomuk::Variant& value )
	{
	determineFinalResourceData();
	m_data->setProperty( uri, value );
	}


	#ifndef KDE_NO_DEPRECATED
	void Nepomuk::Resource::removeProperty( const QString& uri )
	{
	removeProperty( QUrl( uri ) );
	}
	#endif


	void Nepomuk::Resource::removeProperty( const QUrl& uri )
	{
	determineFinalResourceData();
	m_data->removeProperty( uri );
	}


	void Nepomuk::Resource::removeProperty( const QUrl& uri, const Variant& value )
	{
	QList<Variant> vl = property( uri ).toVariantList();
	foreach( const Variant& v, value.toVariantList() ) {
	vl.removeAll( v );
	}
	setProperty( uri, Variant( vl ) );
	}


	void Nepomuk::Resource::remove()
	{
	determineFinalResourceData();
	m_data->remove();
	}


	bool Nepomuk::Resource::exists() const
	{
	determineFinalResourceData();
	if ( m_data ) {
	return m_data->exists();
	}
	else {
	return false;
	}
	}


	bool Nepomuk::Resource::isValid() const
	{
	return m_data ? m_data->isValid() : false;
	}


	// TODO: cache this one in ResourceData
	QString Nepomuk::Resource::genericLabel() const
	{
	QString label = this->label();
	if(!label.isEmpty())
	return label;

	label = property( Soprano::Vocabulary::RDFS::label() ).toString();
	if(!label.isEmpty())
	return label;

	label = property( Nepomuk::Vocabulary::NIE::title() ).toString();
	if(!label.isEmpty())
	return label;

	label = property( Nepomuk::Vocabulary::NCO::fullname() ).toString();
	if(!label.isEmpty())
	return label;

	label = property( Soprano::Vocabulary::NAO::identifier() ).toString();
	if(!label.isEmpty())
	return label;

	label = m_data->pimoThing().label();
	if(!label.isEmpty())
	return label;

	label = property( Nepomuk::Vocabulary::NFO::fileName() ).toString();
	if(!label.isEmpty())
	return label;

	const KUrl nieUrl = property( Nepomuk::Vocabulary::NIE::url() ).toUrl();
	if(!nieUrl.isEmpty()) {
	if(nieUrl.isLocalFile())
	return nieUrl.fileName();
	else
	return nieUrl.prettyUrl();
	}

	QList<Resource> go = property( Vocabulary::PIMO::groundingOccurrence() ).toResourceList();
	if( !go.isEmpty() ) {
	label = go.first().genericLabel();
	if( label != KUrl(go.first().resourceUri()).pathOrUrl() ) {
	return label;
	}
	}

	QString hashValue = property( Vocabulary::NFO::hashValue() ).toString();
	if( !hashValue.isEmpty() )
	return hashValue;

	// ugly fallback
	return KUrl(resourceUri()).pathOrUrl();
	}


	QString Nepomuk::Resource::genericDescription() const
	{
	QString s = property( Soprano::Vocabulary::NAO::description() ).toString();
	if ( !s.isEmpty() ) {
	return s;
	}

	s = property( Soprano::Vocabulary::Xesam::summary() ).toString();
	if ( !s.isEmpty() ) {
	return s;
	}

	s = property( Soprano::Vocabulary::Xesam::description() ).toString();
	if ( !s.isEmpty() ) {
	return s;
	}

	s = property( Soprano::Vocabulary::Xesam::asText() ).toString();
	if ( !s.isEmpty() ) {
	return s;
	}

	s = property( Soprano::Vocabulary::RDFS::comment() ).toString();

	return s;
	}


	QString Nepomuk::Resource::genericIcon() const
	{
	// FIXME: support resource symbols
	Variant symbol = property( Soprano::Vocabulary::NAO::hasSymbol() );
	if ( symbol.isString() ) {
	return symbol.toString();
	} else if ( symbol.isStringList() ) {
	const QStringList l = symbol.toStringList();
	if ( l.isEmpty() )
	return QString();
	return l.first();
	}

	// strigi mimetypes are sadly not very reliable, I keep the code here for future use
	// QString mimeType = property( Soprano::Vocabulary::Xesam::mimeType() ).toString();
	// if ( !mimeType.isEmpty() ) {
	// if ( KMimeType::Ptr m = KMimeType::mimeType( mimeType ) ) {
	// return m->iconName();
	// }
	// }

	if ( hasType( Soprano::Vocabulary::Xesam::File() ) \|\|
	resourceUri().scheme() == "file" ) {
	return KMimeType::iconNameForUrl( resourceUri() );
	}

	return QString();
	}


	Nepomuk::Thing Nepomuk::Resource::pimoThing()
	{
	determineFinalResourceData();
	return m_data->pimoThing();
	}


	bool Nepomuk::Resource::operator==( const Resource& other ) const
	{
	if( this == &other )
	return true;

	if( this->m_data == other.m_data )
	return true;

	if ( !m_data \|\| !other.m_data ) {
	return false;
	}

	// get the resource URIs since two different ResourceData instances
	// can still represent the same Resource
	determineFinalResourceData();
	other.determineFinalResourceData();

	if( m_data->uri().isEmpty() )
	return m_data == other.m_data;
	else
	return resourceUri() == other.resourceUri();
	}


	bool Nepomuk::Resource::operator!=( const Resource& other ) const
	{
	return !operator==( other );
	}


	QString Nepomuk::errorString( ErrorCode code )
	{
	switch( code ) {
	case NoError:
	return i18n("Success");
	case CommunicationError:
	return i18n("Communication error");
	case InvalidType:
	return i18n("Invalid type in Database");
	default:
	return i18n("Unknown error");
	}
	}


	QString Nepomuk::Resource::description() const
	{
	return ( property( Soprano::Vocabulary::NAO::description() ).toStringList() << QString() ).first();
	}


	void Nepomuk::Resource::setDescription( const QString& value )
	{
	setProperty( Soprano::Vocabulary::NAO::description(), Variant( value ) );
	}


	QString Nepomuk::Resource::descriptionUri()
	{
	return Soprano::Vocabulary::NAO::description().toString();
	}


	QStringList Nepomuk::Resource::identifiers() const
	{
	return property( Soprano::Vocabulary::NAO::identifier() ).toStringList();
	}


	void Nepomuk::Resource::setIdentifiers( const QStringList& value )
	{
	setProperty( Soprano::Vocabulary::NAO::identifier(), Variant( value ) );
	}


	void Nepomuk::Resource::addIdentifier( const QString& value )
	{
	Variant v = property( Soprano::Vocabulary::NAO::identifier() );
	v.append( value );
	setProperty( Soprano::Vocabulary::NAO::identifier(), v );
	}


	QString Nepomuk::Resource::identifierUri()
	{
	return Soprano::Vocabulary::NAO::identifier().toString();
	}


	QStringList Nepomuk::Resource::altLabels() const
	{
	return property( Soprano::Vocabulary::NAO::altLabel() ).toStringList();
	}


	void Nepomuk::Resource::setAltLabels( const QStringList& value )
	{
	setProperty( Soprano::Vocabulary::NAO::altLabel(), Variant( value ) );
	}


	void Nepomuk::Resource::addAltLabel( const QString& value )
	{
	Variant v = property( Soprano::Vocabulary::NAO::altLabel() );
	v.append( value );
	setProperty( Soprano::Vocabulary::NAO::altLabel(), v );
	}


	QString Nepomuk::Resource::altLabelUri()
	{
	return Soprano::Vocabulary::NAO::altLabel().toString();
	}


	QList<Nepomuk::Resource> Nepomuk::Resource::annotations() const
	{
	// We always store all Resource types as plain Resource objects.
	// It does not introduce any overhead (due to the implicit sharing of
	// the data and has the advantage that we can mix setProperty calls
	// with the special Resource subclass methods.
	// More importantly Resource loads the data as Resource objects anyway.
	return convertResourceList<Resource>( property( Soprano::Vocabulary::NAO::annotation() ).toResourceList() );
	}


	void Nepomuk::Resource::setAnnotations( const QList<Nepomuk::Resource>& value )
	{
	setProperty( Soprano::Vocabulary::NAO::annotation(), Variant( value ) );
	}


	void Nepomuk::Resource::addAnnotation( const Nepomuk::Resource& value )
	{
	// We always store all Resource types as plain Resource objects.
	// It does not introduce any overhead (due to the implicit sharing of
	// the data and has the advantage that we can mix setProperty calls
	// with the special Resource subclass methods.
	// More importantly Resource loads the data as Resource objects anyway.
	Variant v = property( Soprano::Vocabulary::NAO::annotation() );
	v.append( Resource( value ) );
	setProperty( Soprano::Vocabulary::NAO::annotation(), v );
	}


	QString Nepomuk::Resource::annotationUri()
	{
	return Soprano::Vocabulary::NAO::annotation().toString();
	}


	QList<Nepomuk::Tag> Nepomuk::Resource::tags() const
	{
	// We always store all Resource types as plain Resource objects.
	// It does not introduce any overhead (due to the implicit sharing of
	// the data and has the advantage that we can mix setProperty calls
	// with the special Resource subclass methods.
	// More importantly Resource loads the data as Resource objects anyway.
	return convertResourceList<Tag>( property( Soprano::Vocabulary::NAO::hasTag() ).toResourceList() );
	}


	void Nepomuk::Resource::setTags( const QList<Nepomuk::Tag>& value )
	{
	// We always store all Resource types as plain Resource objects.
	// It does not introduce any overhead (due to the implicit sharing of
	// the data and has the advantage that we can mix setProperty calls
	// with the special Resource subclass methods.
	// More importantly Resource loads the data as Resource objects anyway.
	QList<Resource> l;
	for( QList<Tag>::const_iterator it = value.constBegin();
	it != value.constEnd(); ++it ) {
	l.append( Resource( (*it) ) );
	}
	setProperty( Soprano::Vocabulary::NAO::hasTag(), Variant( l ) );
	}


	void Nepomuk::Resource::addTag( const Nepomuk::Tag& value )
	{
	// We always store all Resource types as plain Resource objects.
	// It does not introduce any overhead (due to the implicit sharing of
	// the data and has the advantage that we can mix setProperty calls
	// with the special Resource subclass methods.
	// More importantly Resource loads the data as Resource objects anyway.
	Variant v = property( Soprano::Vocabulary::NAO::hasTag() );
	v.append( Resource( value ) );
	setProperty( Soprano::Vocabulary::NAO::hasTag(), v );
	}


	QString Nepomuk::Resource::tagUri()
	{
	return Soprano::Vocabulary::NAO::hasTag().toString();
	}


	QList<Nepomuk::Resource> Nepomuk::Resource::topics() const
	{
	// We always store all Resource types as plain Resource objects.
	// It does not introduce any overhead (due to the implicit sharing of
	// the data and has the advantage that we can mix setProperty calls
	// with the special Resource subclass methods.
	// More importantly Resource loads the data as Resource objects anyway.
	return convertResourceList<Resource>( property( Soprano::Vocabulary::NAO::hasTopic() ).toResourceList() );
	}


	void Nepomuk::Resource::setTopics( const QList<Nepomuk::Resource>& value )
	{
	setProperty( Soprano::Vocabulary::NAO::hasTopic(), Variant( value ) );
	}


	void Nepomuk::Resource::addTopic( const Nepomuk::Resource& value )
	{
	// We always store all Resource types as plain Resource objects.
	// It does not introduce any overhead (due to the implicit sharing of
	// the data and has the advantage that we can mix setProperty calls
	// with the special Resource subclass methods.
	// More importantly Resource loads the data as Resource objects anyway.
	Variant v = property( Soprano::Vocabulary::NAO::hasTopic() );
	v.append( Resource( value ) );
	setProperty( Soprano::Vocabulary::NAO::hasTopic(), v );
	}


	QString Nepomuk::Resource::topicUri()
	{
	return Soprano::Vocabulary::NAO::hasTopic().toString();
	}


	QList<Nepomuk::Resource> Nepomuk::Resource::isTopicOfs() const
	{
	// We always store all Resource types as plain Resource objects.
	// It does not introduce any overhead (due to the implicit sharing of
	// the data and has the advantage that we can mix setProperty calls
	// with the special Resource subclass methods.
	// More importantly Resource loads the data as Resource objects anyway.
	return convertResourceList<Resource>( property( Soprano::Vocabulary::NAO::isTopicOf() ).toResourceList() );
	}


	void Nepomuk::Resource::setIsTopicOfs( const QList<Nepomuk::Resource>& value )
	{
	setProperty( Soprano::Vocabulary::NAO::isTopicOf(), Variant( value ) );
	}


	void Nepomuk::Resource::addIsTopicOf( const Nepomuk::Resource& value )
	{
	// We always store all Resource types as plain Resource objects.
	// It does not introduce any overhead (due to the implicit sharing of
	// the data and has the advantage that we can mix setProperty calls
	// with the special Resource subclass methods.
	// More importantly Resource loads the data as Resource objects anyway.
	Variant v = property( Soprano::Vocabulary::NAO::isTopicOf() );
	v.append( Resource( value ) );
	setProperty( Soprano::Vocabulary::NAO::isTopicOf(), v );
	}


	QString Nepomuk::Resource::isTopicOfUri()
	{
	return Soprano::Vocabulary::NAO::isTopicOf().toString();
	}


	QList<Nepomuk::Resource> Nepomuk::Resource::isRelateds() const
	{
	// We always store all Resource types as plain Resource objects.
	// It does not introduce any overhead (due to the implicit sharing of
	// the data and has the advantage that we can mix setProperty calls
	// with the special Resource subclass methods.
	// More importantly Resource loads the data as Resource objects anyway.
	return convertResourceList<Resource>( property( Soprano::Vocabulary::NAO::isRelated() ).toResourceList() );
	}


	void Nepomuk::Resource::setIsRelateds( const QList<Nepomuk::Resource>& value )
	{
	setProperty( Soprano::Vocabulary::NAO::isRelated(), Variant( value ) );
	}


	void Nepomuk::Resource::addIsRelated( const Nepomuk::Resource& value )
	{
	// We always store all Resource types as plain Resource objects.
	// It does not introduce any overhead (due to the implicit sharing of
	// the data and has the advantage that we can mix setProperty calls
	// with the special Resource subclass methods.
	// More importantly Resource loads the data as Resource objects anyway.
	Variant v = property( Soprano::Vocabulary::NAO::isRelated() );
	v.append( Resource( value ) );
	setProperty( Soprano::Vocabulary::NAO::isRelated(), v );
	}


	QString Nepomuk::Resource::isRelatedUri()
	{
	return Soprano::Vocabulary::NAO::isRelated().toString();
	}


	QString Nepomuk::Resource::label() const
	{
	return ( property( Soprano::Vocabulary::NAO::prefLabel() ).toStringList() << QString() ).first();
	}


	void Nepomuk::Resource::setLabel( const QString& value )
	{
	setProperty( Soprano::Vocabulary::NAO::prefLabel(), Variant( value ) );
	}


	QString Nepomuk::Resource::labelUri()
	{
	return Soprano::Vocabulary::NAO::prefLabel().toString();
	}


	quint32 Nepomuk::Resource::rating() const
	{
	return ( property( Soprano::Vocabulary::NAO::numericRating() ).toUnsignedIntList() << 0 ).first();
	}


	void Nepomuk::Resource::setRating( const quint32& value )
	{
	setProperty( Soprano::Vocabulary::NAO::numericRating(), Variant( value ) );
	}


	QString Nepomuk::Resource::ratingUri()
	{
	return Soprano::Vocabulary::NAO::numericRating().toString();
	}


	QStringList Nepomuk::Resource::symbols() const
	{
	return property( Soprano::Vocabulary::NAO::hasSymbol() ).toStringList();
	}


	void Nepomuk::Resource::setSymbols( const QStringList& value )
	{
	setProperty( Soprano::Vocabulary::NAO::hasSymbol(), Variant( value ) );
	}


	void Nepomuk::Resource::addSymbol( const QString& value )
	{
	Variant v = property( Soprano::Vocabulary::NAO::hasSymbol() );
	v.append( value );
	setProperty( Soprano::Vocabulary::NAO::hasSymbol(), v );
	}


	QString Nepomuk::Resource::symbolUri()
	{
	return Soprano::Vocabulary::NAO::hasSymbol().toString();
	}


	QList<Nepomuk::Resource> Nepomuk::Resource::annotationOf() const
	{
	return convertResourceList<Resource>( manager()->allResourcesWithProperty( Soprano::Vocabulary::NAO::annotation(), *this ) );
	}


	QList<Nepomuk::Resource> Nepomuk::Resource::isRelatedOf() const
	{
	return convertResourceList<Resource>( manager()->allResourcesWithProperty( Soprano::Vocabulary::NAO::isRelated(), *this ) );
	}


	// static
	QList<Nepomuk::Resource> Nepomuk::Resource::allResources()
	{
	return Nepomuk::convertResourceList<Resource>( ResourceManager::instance()->allResourcesOfType( Soprano::Vocabulary::RDFS::Resource() ) );
	}


	int Nepomuk::Resource::usageCount() const
	{
	return property( Vocabulary::NUAO::usageCount() ).toInt();
	}


	void Nepomuk::Resource::increaseUsageCount()
	{
	int cnt = 0;
	const QDateTime now = QDateTime::currentDateTime();
	if( hasProperty( Vocabulary::NUAO::usageCount() ) )
	cnt = property( Vocabulary::NUAO::usageCount() ).toInt();
	else
	setProperty( Vocabulary::NUAO::firstUsage(), now );
	++cnt;
	setProperty( Vocabulary::NUAO::usageCount(), cnt );
	setProperty( Vocabulary::NUAO::lastUsage(), now );
	}


	bool Nepomuk::Resource::isFile() const
	{
	if( m_data ) {
	determineFinalResourceData();
	m_data->load();
	return m_data->isFile();
	}
	else {
	return false;
	}
	}


	Nepomuk::File Nepomuk::Resource::toFile() const
	{
	return File( *this );
	}


	// static
	Nepomuk::Resource Nepomuk::Resource::fromResourceUri( const KUrl& uri, const Nepomuk::Types::Class& type, ResourceManager* manager )
	{
	if( !manager )
	manager = ResourceManager::instance();
	QMutexLocker lock( &manager->d->mutex );
	return Resource( manager->d->dataForResourceUri( uri, type.uri() ) );
	}


	void Nepomuk::Resource::determineFinalResourceData() const
	{
	QMutexLocker lock( &m_data->rm()->mutex );

	// Get an initialized ResourceData instance
	ResourceData* oldData = m_data;
	ResourceData* newData = m_data->determineUri();

	Q_ASSERT(oldData);
	Q_ASSERT(newData);

	// in case we get an already existing one we update all instances
	// using the old ResourceData to avoid the overhead of calling
	// determineUri over and over
	if( newData != oldData ) {
	Q_FOREACH( Resource* res, m_data->m_resources) {
	res->m_data = newData;
	oldData->deref( res );
	newData->ref( res );
	}
	}

	if ( !oldData->cnt() )
	delete oldData;
	}


	uint Nepomuk::qHash( const Resource& res )
	{
	return qHash(res.resourceUri());
	}
	diff --git a/nepomuk/core/resourcedata.cpp b/nepomuk/core/resourcedata.cpp
	index 06c4d7e7ef..c9816bf2ed 100644
	--- a/nepomuk/core/resourcedata.cpp
	+++ b/nepomuk/core/resourcedata.cpp
	@@ -1,750 +1,799 @@
	/*
	* This file is part of the Nepomuk KDE project.
	* Copyright (C) 2006-2010 Sebastian Trueg <trueg@kde.org>
	* Copyright (C) 2010 Vishesh Handa <handa.vish@gmail.com>
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Library General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Library General Public License for more details.
	*
	* You should have received a copy of the GNU Library General Public License
	* along with this library; see the file COPYING.LIB. If not, write to
	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*/

	#include "resourcedata.h"
	#include "resourcemanager.h"
	#include "resourcemanager_p.h"
	#include "resource.h"
	#include "tools.h"
	#include "nie.h"
	#include "nfo.h"
	#include "pimo.h"
	#include "nepomukmainmodel.h"
	#include "dbusconnectionpool.h"
	#include "class.h"
	#include "dbustypes.h"

	#include <Soprano/Statement>
	#include <Soprano/StatementIterator>
	#include <Soprano/QueryResultIterator>
	#include <Soprano/Model>
	#include <Soprano/Vocabulary/RDFS>
	#include <Soprano/Vocabulary/RDF>
	#include <Soprano/Vocabulary/Xesam>
	#include <Soprano/Vocabulary/NAO>

	#include <QtCore/QFile>
	#include <QtCore/QDateTime>
	#include <QtCore/QMutexLocker>
	#include <QtDBus/QDBusConnection>
	#include <QtDBus/QDBusInterface>
	#include <QtDBus/QDBusReply>

	#include <kdebug.h>
	#include <kurl.h>
	#include <kcomponentdata.h>

	using namespace Soprano;

	#define MAINMODEL (m_rm->m_manager->mainModel())


	Nepomuk::ResourceData::ResourceData( const QUrl& uri, const QUrl& kickOffUri, const QUrl& type, ResourceManagerPrivate* rm )
	: m_uri(uri),
	m_mainType( type ),
	m_modificationMutex(QMutex::Recursive),
	m_cacheDirty(true),
	m_pimoThing(0),
	m_groundingOccurence(0),
	m_rm(rm)
	{
	if( m_mainType.isEmpty() ) {
	m_mainType = Soprano::Vocabulary::RDFS::Resource();
	}

	m_types << m_mainType;

	if( m_rm->dataCacheFull() )
	m_rm->cleanupCache();

	m_rm->dataCnt.ref();

	if( !uri.isEmpty() ) {
	m_kickoffUris.insert( uri );
	}
	if( !kickOffUri.isEmpty() ) {
	m_kickoffUris.insert( kickOffUri );
	}
	m_rm->addToKickOffList( this, m_kickoffUris );
	}


	Nepomuk::ResourceData::~ResourceData()
	{
	resetAll(true);
	m_rm->dataCnt.deref();
	}


	bool Nepomuk::ResourceData::isFile()
	{
	return( m_uri.scheme() == QLatin1String("file") \|\|
	m_nieUrl.scheme() == QLatin1String("file") \|\|
	(!m_kickoffUris.isEmpty() && (*m_kickoffUris.begin()).scheme() == QLatin1String("file")) \|\|
	constHasType( Soprano::Vocabulary::Xesam::File() ) \|\|
	constHasType( Nepomuk::Vocabulary::NFO::FileDataObject() ) );
	}


	QUrl Nepomuk::ResourceData::uri() const
	{
	return m_uri;
	}


	QUrl Nepomuk::ResourceData::type()
	{
	load();
	return m_mainType;
	}


	QList<QUrl> Nepomuk::ResourceData::allTypes()
	{
	load();
	return m_types;
	}


	void Nepomuk::ResourceData::setTypes( const QList<QUrl>& types )
	{
	store();

	QMutexLocker lock(&m_modificationMutex);

	// reset types
	m_types.clear();
	m_mainType = Soprano::Vocabulary::RDFS::Resource();

	QList<Node> nodes;
	// load types (and set maintype)
	foreach( const QUrl& url, types ) {
	loadType( url );
	nodes << Node( url );
	}

	// update the data store
	setProperty(Soprano::Vocabulary::RDF::type(), Nepomuk::Variant(types) );
	}



	void Nepomuk::ResourceData::resetAll( bool isDelete )
	{
	// remove us from all caches (store() will re-insert us later if necessary)
	m_rm->mutex.lock();
	if( !m_uri.isEmpty() )
	m_rm->m_initializedData.remove( m_uri );
	Q_FOREACH( const KUrl& uri, m_kickoffUris )
	m_rm->m_uriKickoffData.remove( uri );
	m_rm->mutex.unlock();

	// reset all variables
	m_uri = QUrl();
	m_nieUrl = KUrl();
	m_kickoffUris.clear();
	m_cache.clear();
	m_cacheDirty = false;
	m_types.clear();
	delete m_pimoThing;
	m_pimoThing = 0;
	m_groundingOccurence = 0;

	// when we are being deleted the value of m_mainType is not important
	// anymore. Also since ResourceManager is a global static it might be
	// deleted after the global static behind Soprano::Vocabulary::RDFS
	// which results in a crash.
	if( !isDelete )
	m_mainType = Soprano::Vocabulary::RDFS::Resource();
	}


	QHash<QUrl, Nepomuk::Variant> Nepomuk::ResourceData::allProperties()
	{
	load();
	return m_cache;
	}


	bool Nepomuk::ResourceData::hasProperty( const QUrl& uri )
	{
	load();
	QHash<QUrl, Variant>::const_iterator it = m_cache.constFind( uri );
	if( it == m_cache.constEnd() )
	return false;

	return true;
	}


	bool Nepomuk::ResourceData::hasProperty( const QUrl& p, const Variant& v )
	{
	QHash<QUrl, Variant>::const_iterator it = m_cache.constFind( p );
	if( it == m_cache.constEnd() )
	return false;

	QList<Variant> thisVals = it.value().toVariantList();
	QList<Variant> vals = v.toVariantList();
	Q_FOREACH( const Variant& val, vals ) {
	if( !thisVals.contains(val) )
	return false;
	}
	return true;
	}


	bool Nepomuk::ResourceData::hasType( const QUrl& uri )
	{
	load();
	return constHasType( uri );
	}


	bool Nepomuk::ResourceData::constHasType( const QUrl& uri ) const
	{
	// we need to protect the reading, too. setTypes may be triggered from another thread
	QMutexLocker lock(&m_modificationMutex);

	Types::Class requestedType( uri );
	for ( QList<QUrl>::const_iterator it = m_types.constBegin();
	it != m_types.constEnd(); ++it ) {
	Types::Class availType( *it );
	if ( availType == requestedType \|\|
	availType.isSubClassOf( requestedType ) ) {
	return true;
	}
	}
	return false;
	}


	Nepomuk::Variant Nepomuk::ResourceData::property( const QUrl& uri )
	{
	load();

	// we need to protect the reading, too. load my be triggered from another thread's
	// connection to a Soprano statement signal
	QMutexLocker lock(&m_modificationMutex);

	QHash<QUrl, Variant>::const_iterator it = m_cache.constFind( uri );
	if ( it == m_cache.constEnd() ) {
	return Variant();
	}
	else {
	return *it;
	}
	}


	bool Nepomuk::ResourceData::store()
	{
	QMutexLocker lock(&m_modificationMutex);

	if ( m_uri.isEmpty() ) {
	QMutexLocker rmlock(&m_rm->mutex);

	if ( m_nieUrl.isValid() &&
	m_nieUrl.isLocalFile() &&
	m_mainType == Soprano::Vocabulary::RDFS::Resource() ) {
	m_mainType = Nepomuk::Vocabulary::NFO::FileDataObject();
	m_types << m_mainType;
	}

	QDBusConnection bus = QDBusConnection::sessionBus();
	QDBusMessage msg = QDBusMessage::createMethodCall( QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("/datamanagement"),
	QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("createResource") );
	QString app = KGlobal::mainComponent().componentName();
	QVariantList arguments;

	//FIXME: Maybe we should be setting the 'label' over here.
	arguments << DBus::convertUriList(m_types) << QString() << QString() << app;
	msg.setArguments( arguments );

	QDBusMessage reply = bus.call( msg );
	if( reply.type() == QDBusMessage::ErrorMessage ) {
	//TODO: Set the error somehow
	kWarning() << reply.errorMessage();
	return false;
	}
	else if( reply.type() == QDBusMessage::ReplyMessage ) {
	m_uri = reply.arguments().at(0).toUrl();
	}

	// Add us to the initialized data, i.e. make us "valid"
	m_rm->m_initializedData.insert( m_uri, this );

	// each initialized resource has to be in a kickoff list
	// thus, we make sure that is the case.
	if( m_kickoffUris.isEmpty() ) {
	m_kickoffUris.insert( m_uri );
	m_rm->addToKickOffList( this, m_kickoffUris );
	}

	// store our grounding occurrence in case we are a thing created by the pimoThing() method
	if( m_groundingOccurence ) {
	if( m_groundingOccurence != this )
	m_groundingOccurence->store();
	setProperty(Vocabulary::PIMO::groundingOccurrence(), Variant(m_groundingOccurence->uri()) );
	}

	foreach( const KUrl& url, m_kickoffUris ) {
	if( url.scheme().isEmpty() )
	setProperty( Soprano::Vocabulary::NAO::identifier(), Variant(url.url()) );
	else
	setProperty( Nepomuk::Vocabulary::NIE::url(), Variant(url.url()) );
	}
	}

	return true;
	}


	void Nepomuk::ResourceData::loadType( const QUrl& storedType )
	{
	if ( !m_types.contains( storedType ) ) {
	m_types << storedType;
	}
	if ( m_mainType == Soprano::Vocabulary::RDFS::Resource() ) {
	Q_ASSERT( !storedType.isEmpty() );
	m_mainType = storedType;
	}
	else {
	Types::Class currentTypeClass = m_mainType;
	Types::Class storedTypeClass = storedType;

	// Keep the type that is further down the hierarchy
	if ( storedTypeClass.isSubClassOf( currentTypeClass ) ) {
	m_mainType = storedTypeClass.uri();
	}
	else {
	// This is a little convenience hack since the user is most likely
	// more interested in the file content than the actual file
	Types::Class xesamContentClass( Soprano::Vocabulary::Xesam::Content() );
	if ( m_mainType == Soprano::Vocabulary::Xesam::File() &&
	( storedTypeClass == xesamContentClass \|\|
	storedTypeClass.isSubClassOf( xesamContentClass ) ) ) {
	m_mainType = storedTypeClass.uri();
	}
	else {
	// the same is true for nie:DataObject vs. nie:InformationElement
	Types::Class nieInformationElementClass( Vocabulary::NIE::InformationElement() );
	Types::Class nieDataObjectClass( Vocabulary::NIE::DataObject() );
	if( ( currentTypeClass == nieDataObjectClass \|\|
	currentTypeClass.isSubClassOf( nieDataObjectClass ) ) &&
	( storedTypeClass == nieInformationElementClass \|\|
	storedTypeClass.isSubClassOf( nieInformationElementClass ) ) ) {
	m_mainType = storedTypeClass.uri();
	}
	}
	}
	}
	}


	bool Nepomuk::ResourceData::load()
	{
	QMutexLocker lock(&m_modificationMutex);

	if ( m_cacheDirty ) {
	m_cache.clear();

	if ( m_uri.isValid() ) {
	//
	// We exclude properties that are part of the inference graph
	// It would only pollute the user interface
	//
	Soprano::QueryResultIterator it = MAINMODEL->executeQuery(QString("select distinct ?p ?o where { "
	"graph ?g { %1 ?p ?o . } . FILTER(?g!=<urn:crappyinference2:inferredtriples>) . "
	"}").arg(Soprano::Node::resourceToN3(m_uri)),
	Soprano::Query::QueryLanguageSparql);
	while ( it.next() ) {
	QUrl p = it["p"].uri();
	Soprano::Node o = it["o"];
	if ( p == Soprano::Vocabulary::RDF::type() ) {
	if ( o.isResource() ) {
	loadType( o.uri() );
	}
	}
	else {
	Nepomuk::Variant var = Variant::fromNode( o );
	updateKickOffLists( p, var );
	m_cache[p].append( var );
	}
	}

	m_cacheDirty = false;

	delete m_pimoThing;
	m_pimoThing = 0;
	if( hasType( Vocabulary::PIMO::Thing() ) ) {
	m_pimoThing = new Thing( m_uri );
	}
	else {
	// TODO: somehow handle pimo:referencingOccurrence and pimo:occurrence
	QueryResultIterator pimoIt = MAINMODEL->executeQuery( QString( "select ?r where { ?r <%1> <%2> . }")
	.arg( Vocabulary::PIMO::groundingOccurrence().toString() )
	.arg( QString::fromAscii( m_uri.toEncoded() ) ),
	Soprano::Query::QueryLanguageSparql );
	if( pimoIt.next() ) {
	m_pimoThing = new Thing( pimoIt.binding("r").uri() );
	}
	}

	return true;
	}
	else {
	return false;
	}
	}
	else {
	return true;
	}
	}


	void Nepomuk::ResourceData::setProperty( const QUrl& uri, const Nepomuk::Variant& value )
	{
	Q_ASSERT( uri.isValid() );

	if( store() ) {
	// step 0: make sure this resource is in the store
	QMutexLocker lock(&m_modificationMutex);

	// update the store
	QDBusConnection bus = QDBusConnection::sessionBus();
	QDBusMessage msg = QDBusMessage::createMethodCall( QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("/datamanagement"),
	QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("setProperty") );
	QString app = KGlobal::mainComponent().componentName();
	QVariantList arguments;
	QVariantList varList;
	foreach( const Nepomuk::Variant var, value.toVariantList() ) {
	// make sure resource values are in the store
	if( var.simpleType() == qMetaTypeId<Resource>() ) {
	var.toResource().m_data->store();
	varList << var.toUrl();
	}
	else {
	varList << var.variant();
	}
	}

	arguments << DBus::convertUriList(QList<QUrl>() << m_uri) << DBus::convertUri(uri)
	<< QVariant(DBus::normalizeVariantList(varList)) << app;
	msg.setArguments( arguments );

	QDBusMessage reply = bus.call( msg );
	if( reply.type() == QDBusMessage::ErrorMessage ) {
	//TODO: Set the error somehow
	kWarning() << reply.errorMessage();
	return;
	}

	// update the cache for now
	if( value.isValid() )
	m_cache[uri] = value;
	else
	m_cache.remove(uri);

	// update the kickofflists
	updateKickOffLists( uri, value );
	}
	}


	+void Nepomuk::ResourceData::addProperty( const QUrl& uri, const Nepomuk::Variant& value )
	+{
	+ Q_ASSERT( uri.isValid() );
	+
	+ if( value.isValid() && store() ) {
	+ // step 0: make sure this resource is in the store
	+ QMutexLocker lock(&m_modificationMutex);
	+
	+ // update the store
	+ QDBusConnection bus = QDBusConnection::sessionBus();
	+ QDBusMessage msg = QDBusMessage::createMethodCall( QLatin1String("org.kde.nepomuk.DataManagement"),
	+ QLatin1String("/datamanagement"),
	+ QLatin1String("org.kde.nepomuk.DataManagement"),
	+ QLatin1String("addProperty") );
	+ QString app = KGlobal::mainComponent().componentName();
	+ QVariantList arguments;
	+ QVariantList varList;
	+ foreach( const Nepomuk::Variant var, value.toVariantList() ) {
	+ // make sure resource values are in the store
	+ if( var.simpleType() == qMetaTypeId<Resource>() ) {
	+ var.toResource().m_data->store();
	+ varList << var.toUrl();
	+ }
	+ else {
	+ varList << var.variant();
	+ }
	+ }
	+
	+ arguments << DBus::convertUriList(QList<QUrl>() << m_uri) << DBus::convertUri(uri)
	+ << QVariant(DBus::normalizeVariantList(varList)) << app;
	+ msg.setArguments( arguments );
	+
	+ QDBusMessage reply = bus.call( msg );
	+ if( reply.type() == QDBusMessage::ErrorMessage ) {
	+ //TODO: Set the error somehow
	+ kWarning() << reply.errorMessage();
	+ return;
	+ }
	+
	+ // update the cache for now
	+ if( value.isValid() )
	+ m_cache[uri].append(value);
	+
	+ // update the kickofflists
	+ updateKickOffLists( uri, value );
	+ }
	+}
	+
	+
	void Nepomuk::ResourceData::removeProperty( const QUrl& uri )
	{
	Q_ASSERT( uri.isValid() );
	if( !m_uri.isEmpty() ) {
	QMutexLocker lock(&m_modificationMutex);

	QDBusConnection bus = QDBusConnection::sessionBus();
	QDBusMessage msg = QDBusMessage::createMethodCall( QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("/datamanagement"),
	QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("removeProperties") );
	QString app = KGlobal::mainComponent().componentName();
	QVariantList arguments;
	arguments << DBus::convertUri(m_uri) << DBus::convertUri(uri) << app;
	msg.setArguments( arguments );

	QDBusMessage reply = bus.call( msg );
	if( reply.type() == QDBusMessage::ErrorMessage ) {
	//TODO: Set the error somehow
	kWarning() << reply.errorMessage();
	return;
	}

	// Update the cache
	m_cache.remove( uri );

	// update the kickofflists
	updateKickOffLists( uri, Variant() );
	}
	}


	void Nepomuk::ResourceData::remove( bool recursive )
	{
	Q_UNUSED(recursive)
	QMutexLocker lock(&m_modificationMutex);

	if( !m_uri.isEmpty() ) {
	QDBusConnection bus = QDBusConnection::sessionBus();
	QDBusMessage msg = QDBusMessage::createMethodCall( QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("/datamanagement"),
	QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("removeResources") );
	QString app = KGlobal::mainComponent().componentName();
	QVariantList arguments;
	// TODO: Set the flag over here
	arguments << DBus::convertUri(m_uri) << 0 << app;
	msg.setArguments( arguments );

	QDBusMessage reply = bus.call( msg );
	if( reply.type() == QDBusMessage::ErrorMessage ) {
	//TODO: Set the error somehow
	kWarning() << reply.errorMessage();
	return;
	}
	}

	resetAll();
	}


	bool Nepomuk::ResourceData::exists()
	{
	if( m_uri.isValid() ) {
	const QString query = QString::fromLatin1("ask { %1 ?p ?o . }")
	.arg( Soprano::Node::resourceToN3(m_uri) );
	return MAINMODEL->executeQuery( query, Soprano::Query::QueryLanguageSparql ).boolValue();
	}
	else {
	return false;
	}
	}


	bool Nepomuk::ResourceData::isValid() const
	{
	return( !m_mainType.isEmpty() && ( !m_uri.isEmpty() \|\| !m_kickoffUris.isEmpty() ) );
	}


	Nepomuk::ResourceData* Nepomuk::ResourceData::determineUri()
	{
	// We have the following possible situations:
	// 1. m_uri is already valid
	// -> simple, nothing to do
	//
	// 2. m_uri is not valid
	// -> we need to determine the URI
	//
	// 2.1. m_kickoffUri is valid
	// 2.1.1. it is a file URL
	// 2.1.1.1. it is nie:url for r
	// -> use r as m_uri
	// 2.1.1.2. it points to a file on a removable device for which we have a filex:/ URL
	// -> use the r in r nie:url filex:/...
	// 2.1.1.3. it is a file which is not an object in some nie:url relation
	// -> create new random m_uri and use kickoffUriOrId() as m_nieUrl
	// 2.1.2. it is a resource URI
	// -> use it as m_uri
	//
	// 2.2. m_kickOffUri is not valid
	// 2.2.1. m_kickOffUri is a nao:identifier for r
	// -> use r as m_uri
	//

	if( m_uri.isEmpty() ) {
	Soprano::Model* model = MAINMODEL;

	if( !m_kickoffUris.isEmpty() ) {
	KUrl kickOffUri = *m_kickoffUris.begin();
	if( kickOffUri.scheme().isEmpty() ) {
	//
	// Not valid. Checking for nao:identifier
	//
	QString query = QString::fromLatin1("select distinct ?r where { ?r %1 %2. } LIMIT 1")
	.arg( Soprano::Node::resourceToN3(Soprano::Vocabulary::NAO::identifier()) )
	.arg( Soprano::Node::literalToN3( kickOffUri.url() ) );

	Soprano::QueryResultIterator it = model->executeQuery( query, Soprano::Query::QueryLanguageSparql );
	if( it.next() ) {
	m_uri = it["r"].uri();
	it.close();
	}
	}
	else {
	//
	// In one query determine if the URI is already used as resource URI or as
	// nie:url
	//
	QString query = QString::fromLatin1("select distinct ?r ?o where { "
	"{ ?r %1 %2 . FILTER(?r!=%2) . } "
	"UNION "
	"{ %2 ?p ?o . } "
	"} LIMIT 1")
	.arg( Soprano::Node::resourceToN3( Nepomuk::Vocabulary::NIE::url() ) )
	.arg( Soprano::Node::resourceToN3( kickOffUri ) );
	Soprano::QueryResultIterator it = model->executeQuery( query, Soprano::Query::QueryLanguageSparql );
	if( it.next() ) {
	QUrl uri = it["r"].uri();
	if( uri.isEmpty() ) {
	m_uri = kickOffUri;
	}
	else {
	m_uri = uri;
	m_nieUrl = kickOffUri;
	}
	it.close();
	}
	else if( kickOffUri.scheme() == QLatin1String("nepomuk") ) {
	// for nepomuk URIs we simply use the kickoff URI as resource URI
	m_uri = kickOffUri;
	}
	else {
	// for everything else we use m_kickoffUri as nie:url with a new random m_uri
	m_nieUrl = kickOffUri;
	}
	}
	}
	}

	//
	// Move us to the final data hash now that the URI is known
	//
	if( !m_uri.isEmpty() ) {
	//vHanda: Is there some way to avoid this hash lookup every time?
	// It sure would speed things up.
	ResourceDataHash::iterator it = m_rm->m_initializedData.find(m_uri);
	if( it == m_rm->m_initializedData.end() ) {
	m_rm->m_initializedData.insert( m_uri, this );
	}
	else {
	return it.value();
	}
	}

	return this;
	}


	void Nepomuk::ResourceData::invalidateCache()
	{
	m_cacheDirty = true;
	}


	Nepomuk::Thing Nepomuk::ResourceData::pimoThing()
	{
	load();
	if( !m_pimoThing ) {
	//
	// We only create a new thing if we are a nie:InformationElement.
	// All other resources will simply be converted into a pimo:Thing
	//
	// Files, however, are a special case in every aspect. this includes pimo things.
	// Files are their own grounding occurrence. This makes a lot of things
	// much simpler.
	//
	if( hasType( Vocabulary::PIMO::Thing() ) \|\|
	isFile() \|\|
	!hasType( Vocabulary::NIE::InformationElement() ) ) {
	m_pimoThing = new Thing(this);
	}
	else {
	m_pimoThing = new Thing();
	}
	m_pimoThing->m_data->m_groundingOccurence = this;
	}
	return *m_pimoThing;
	}


	bool Nepomuk::ResourceData::operator==( const ResourceData& other ) const
	{
	if( this == &other )
	return true;

	return( m_uri == other.m_uri &&
	m_mainType == other.m_mainType &&
	m_kickoffUris == other.m_kickoffUris );
	}


	QDebug Nepomuk::ResourceData::operator<<( QDebug dbg ) const
	{
	KUrl::List list = m_kickoffUris.toList();
	dbg << QString::fromLatin1("[kickoffuri: %1; uri: %2; type: %3; ref: %4]")
	.arg( list.toStringList().join(QLatin1String(",")),
	m_uri.url(),
	m_mainType.toString() )
	.arg( m_ref );

	return dbg;
	}


	QDebug operator<<( QDebug dbg, const Nepomuk::ResourceData& data )
	{
	return data.operator<<( dbg );
	}


	void Nepomuk::ResourceData::updateKickOffLists(const QUrl& prop, const Nepomuk::Variant& v)
	{
	KUrl oldUrl;
	KUrl newUrl;
	if( prop == Nepomuk::Vocabulary::NIE::url() ) {
	oldUrl = m_nieUrl;
	newUrl = v.toUrl();
	m_nieUrl = newUrl;
	}
	else if( prop == Soprano::Vocabulary::NAO::identifier() ) {
	Q_FOREACH( const KUrl& url, m_kickoffUris ) {
	if( url.scheme().isEmpty() ) {
	oldUrl = url;
	break;
	}
	}
	newUrl = KUrl( v.toString() );
	}
	else {
	return;
	}

	if( oldUrl != newUrl ) {
	QMutexLocker rmlock(&m_rm->mutex);

	m_kickoffUris.remove( oldUrl );
	m_rm->m_uriKickoffData.remove( oldUrl );

	if( !newUrl.isEmpty() ) {
	m_kickoffUris.insert( newUrl );
	m_rm->m_uriKickoffData.insert( newUrl, this );
	}
	}
	}
	diff --git a/nepomuk/core/resourcedata.h b/nepomuk/core/resourcedata.h
	index 461b225a56..be4f0a5bc7 100644
	--- a/nepomuk/core/resourcedata.h
	+++ b/nepomuk/core/resourcedata.h
	@@ -1,217 +1,219 @@
	/*
	* This file is part of the Nepomuk KDE project.
	* Copyright (C) 2006-2010 Sebastian Trueg <trueg@kde.org>
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Library General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Library General Public License for more details.
	*
	* You should have received a copy of the GNU Library General Public License
	* along with this library; see the file COPYING.LIB. If not, write to
	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*/

	#ifndef _NEPOMUK_RESOURCE_DATA_H_
	#define _NEPOMUK_RESOURCE_DATA_H_

	#include <QtCore/QString>
	#include <QtCore/QList>
	#include <QtCore/QHash>
	#include <QtCore/QMutex>
	#include <QtCore/QAtomicInt>
	#include <QtCore/QSet>

	#include "variant.h"
	#include "thing.h"

	#include <kurl.h>

	#include <soprano/statement.h>


	namespace Nepomuk {

	class Resource;
	class ResourceManagerPrivate;

	class ResourceData
	{
	public:
	explicit ResourceData( const QUrl& uri, const QUrl& kickOffUri, const QUrl& type_, ResourceManagerPrivate* rm );
	~ResourceData();

	inline bool ref(Nepomuk::Resource* res) {
	m_resources.push_back( res );
	return m_ref.ref();
	}


	inline bool deref(Nepomuk::Resource* res) {
	m_resources.removeAll( res );
	return m_ref.deref();
	}

	inline int cnt() const {
	return m_ref;
	}

	/**
	* Tries to determine if this resource represents a file by examining the type and the uri.
	*/
	bool isFile();

	/**
	* The URI of the resource. This might be empty if the resource was not synced yet.
	*/
	QUrl uri() const;

	/**
	* \return The main type of the resource. ResourceData tries hard to make this the
	* most important type, i.e. that which is furthest down the hierachy.
	*/
	QUrl type();

	QList<QUrl> allTypes();

	void setTypes( const QList<QUrl>& types );

	QHash<QUrl, Variant> allProperties();

	bool hasProperty( const QUrl& uri );

	bool hasProperty( const QUrl& p, const Variant& v );

	/**
	* Does also check for subClass relations.
	*/
	bool hasType( const QUrl& uri );

	/**
	* Check the type without loading data from the store.
	*/
	bool constHasType( const QUrl& type ) const;

	Variant property( const QUrl& uri );

	/**
	* Set a property. The property will directly be saved to the RDF store.
	* Calls store to make sure this resource and property resources are properly
	* stored.
	*/
	void setProperty( const QUrl& uri, const Variant& value );

	+ void addProperty( const QUrl& uri, const Variant& value );
	+
	void removeProperty( const QUrl& uri );

	/**
	* Makes sure the resource is present in the RDF store. This means that if it does
	* not exist the type and the identifier (if one has been used to create the instance)
	* are stored.
	*
	* This is also the only place where a new URI is generated via ResourceManager::generateUniqueUri()
	* in case m_uri is empty.
	*
	* \sa exists, setProperty
	*/
	bool store();

	bool load();

	/**
	* Remove this resource data from the store completely.
	* \param recursive If true all statements that contain this
	* resource as an object will be removed, too.
	*/
	void remove( bool recursive = true );

	/**
	* This method only works with a proper URI, i.e. it does
	* not work on non-initialized resources that only know
	* their kickoffUriOrId
	*/
	bool exists();

	bool isValid() const;

	/**
	* Searches for the resource in the Nepomuk store using m_kickoffId and m_kickoffUri.
	*
	* This will either get the actual resource URI from the database
	* and add m_data into ResourceManagerPrivate::m_initializedData
	* or it will find another ResourceData instance in m_initializedData
	* which represents the same resource. The ResourceData that should be
	* used is returned.
	*
	* \returns The initialized ResourceData object representing the actual resource.
	*
	* m_determineUriMutex needs to be locked before calling this method
	*/
	ResourceData* determineUri();

	void invalidateCache();

	Thing pimoThing();

	/**
	* Compares the properties of two ResourceData objects taking into account the Deleted flag
	*/
	bool operator==( const ResourceData& other ) const;

	QDebug operator<<( QDebug dbg ) const;

	ResourceManagerPrivate* rm() const { return m_rm; }

	/// Contains a list of resources which use this ResourceData
	QList<Resource*> m_resources;

	/// the URI that was used to construct the resource. Will be used by determineUri
	/// to find the actual resource URI which is either m_kickoffUri itself or
	/// a resource URI which relates to m_kickoffUri by nie:url
	/// This is a set since Resource::determineFinalResourceData may add additional uris
	QSet<KUrl> m_kickoffUris;

	private:
	void loadType( const QUrl& type );

	/// Will reset this instance to 0 as if constructed without parameters
	/// Used by remove() and deleteData()
	void resetAll( bool isDelete = false );

	/// Updates both m_kickoffUris and ResourceMangerPrivate's list
	void updateKickOffLists( const QUrl & prop, const Variant & v );

	/// final resource URI created by determineUri
	KUrl m_uri;

	/// the URL of file resources
	KUrl m_nieUrl;

	QUrl m_mainType;
	QList<QUrl> m_types;

	QAtomicInt m_ref;

	mutable QMutex m_modificationMutex;

	QHash<QUrl, Variant> m_cache;
	bool m_cacheDirty;

	// using a pointer to avoid infinite creation loop
	Thing* m_pimoThing;

	// only used for delayed storage of the pimo thing relation
	ResourceData* m_groundingOccurence;

	ResourceManagerPrivate* m_rm;
	};
	}

	QDebug operator<<( QDebug dbg, const Nepomuk::ResourceData& );

	#endif

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