/usr/include/soprano/filtermodel.h is in libsoprano-dev 2.7.6+dfsg.1-2wheezy1.
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* This file is part of Soprano Project.
*
* Copyright (C) 2007 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 _SOPRANO_FILTER_MODEL_H_
#define _SOPRANO_FILTER_MODEL_H_
#include "model.h"
#include "soprano_export.h"
namespace Soprano {
/**
* \class FilterModel filtermodel.h Soprano/FilterModel
*
* \brief A FilterModel is a virtual model that wraps another Model.
*
* FilterModels can be stacked to provide filtering on each of
* the Model's methods. A FilterModel has a parent model which
* is the data base for this filter. The parent can be an actual
* StorageModel or another FilterModel.
*
* <b>Error handling:</b>
*
* The FilterModel "inherits" its parent Model's errors, i.e. FilterModel::lastError()
* always equals FilterModel::parent()->lastError() (If the FilterModel implementations
* are called in subclasses).
*
* \author Sebastian Trueg <trueg@kde.org>
*/
class SOPRANO_EXPORT FilterModel : public Model
{
Q_OBJECT
public:
/**
* Destructor
*/
virtual ~FilterModel();
//@{
/**
* Set the parent Model.
* \param model The Model that this filter will forward any commands to.
*/
virtual void setParentModel( Model* model );
/**
* Get the parent model.
* \return The parent Model or 0 if none has been set.
*/
virtual Model* parentModel() const;
//@}
//@{
/**
* Default implementation simply pipes the call through to the parent model.
*/
virtual Error::ErrorCode addStatement( const Statement &statement );
/**
* Reimplemented for convenience. Calls Model::addStatement(const Node&,const Node&,const Node&,const Node&)
*/
Error::ErrorCode addStatement( const Node& subject, const Node& predicate, const Node& object, const Node& context = Node() );
//@}
//@{
/**
* Default implementation simply pipes the call through to the parent model.
*/
virtual Error::ErrorCode removeStatement( const Statement &statement );
/**
* Reimplemented for convenience. Calls Model::removeStatement(const Node&,const Node&,const Node&,const Node&)
*/
Error::ErrorCode removeStatement( const Node& subject, const Node& predicate, const Node& object, const Node& context = Node() );
/**
* Default implementation simply pipes the call through to the parent model.
*/
virtual Error::ErrorCode removeAllStatements( const Statement &statement );
/**
* Reimplemented for convenience. Calls Model::removeAllStatements(const Node&,const Node&,const Node&,const Node&)
*/
Error::ErrorCode removeAllStatements( const Node& subject, const Node& predicate, const Node& object, const Node& context = Node() );
//@}
//@{
/**
* Default implementation simply pipes the call through to the parent model.
*/
virtual StatementIterator listStatements( const Statement &partial ) const;
/**
* Reimplemented for convenience. Calls Model::listStatements(const Node&,const Node&,const Node&,const Node&)
*/
StatementIterator listStatements( const Node& subject, const Node& predicate, const Node& object, const Node& context = Node() ) const;
/**
* Default implementation simply pipes the call through to the parent model.
*/
virtual NodeIterator listContexts() const;
/**
* Default implementation simply pipes the call through to the parent model.
*/
// virtual QueryResultIterator executeQuery( const Query::Query& query ) const;
/**
* Default implementation simply pipes the call through to the parent model.
*/
virtual QueryResultIterator executeQuery( const QString& query, Query::QueryLanguage language, const QString& userQueryLanguage = QString() ) const;
//@}
//@{
/**
* Default implementation simply pipes the call through to the parent model.
*/
virtual bool containsStatement( const Statement &statement ) const;
/**
* Reimplemented for convenience. Calls Model::containsStatement(const Node&,const Node&,const Node&,const Node&)
*/
bool containsStatement( const Node& subject, const Node& predicate, const Node& object, const Node& context = Node() ) const;
/**
* Default implementation simply pipes the call through to the parent model.
*/
virtual bool containsAnyStatement( const Statement &statement ) const;
/**
* Reimplemented for convenience. Calls Model::containsAnyStatement(const Node&,const Node&,const Node&,const Node&)
*/
bool containsAnyStatement( const Node& subject, const Node& predicate, const Node& object, const Node& context = Node() ) const;
//@}
//@{
/**
* Default implementation simply pipes the call through to the parent model.
*/
virtual bool isEmpty() const;
/**
* Default implementation simply pipes the call through to the parent model.
*/
virtual int statementCount() const;
//@}
//@{
/**
* Default implementation simply pipes the call through to the parent model.
*/
virtual Error::ErrorCode write( QTextStream &os ) const;
//@}
//@{
/**
* Default implementation simply pipes the call through to the parent model.
*/
virtual Node createBlankNode();
//@}
using Model::addStatement;
using Model::removeStatement;
using Model::removeAllStatements;
using Model::listStatements;
using Model::containsStatement;
using Model::containsAnyStatement;
protected:
/**
* Create an empty filter model.
*/
FilterModel();
/**
* Create a new FilterModel which works on parent.
* Calls setParentModel.
* \param parent The parent Model.
*/
FilterModel( Model* parent );
/**
* Handle a statementsAdded() signal from the parent Model.
*
* The default implementation simply re-emits the signal.
*/
virtual void parentStatementsAdded();
/**
* Handle a statementsRemoved() signal from the parent Model.
*
* The default implementation simply re-emits the signal.
*/
virtual void parentStatementsRemoved();
/**
* Handle a statementsAdded() signal from the parent Model.
*
* The default implementation simply re-emits the signal.
*/
virtual void parentStatementAdded( const Statement& );
/**
* Handle a statementsRemoved() signal from the parent Model.
*
* The default implementation simply re-emits the signal.
*/
virtual void parentStatementRemoved( const Statement& );
private Q_SLOTS:
/**
* This slot gets connected to Model::statementsAdded of the parent
* model.
*/
void slotStatementsAdded();
/**
* This slot gets connected to Model::statementsRemoved of the parent
* model.
*/
void slotStatementsRemoved();
/**
* This slot gets connected to Model::statementAdded of the parent
* model.
*/
void slotStatementAdded( const Soprano::Statement& );
/**
* This slot gets connected to Model::statementRemoved of the parent
* model.
*/
void slotStatementRemoved( const Soprano::Statement& );
private:
class Private;
Private* const d;
};
}
#endif
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