/usr/include/soprano/queryresultiteratorbackend.h is in libsoprano-dev 2.7.6+dfsg.1-2wheezy1.
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* This file is part of Soprano Project.
*
* Copyright (C) 2006 Daniele Galdi <daniele.galdi@gmail.com>
* Copyright (C) 2007-2010 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 SOPRANO_QUERY_RESULT_H
#define SOPRANO_QUERY_RESULT_H
#include "iteratorbackend.h"
#include "bindingset.h"
#include <QtCore/QStringList>
namespace Soprano {
class Node;
class Statement;
/**
* \class QueryResultIteratorBackend queryresultiteratorbackend.h Soprano/QueryResultIteratorBackend
*
* \brief QueryResultIteratorBackend is the actual working horse behind QueryResultIterator.
*
* Each Backend implementation has to have its own version of QueryResultIteratorBackend.
*
* \author Daniele Galdi <daniele.galdi@gmail.com><br>Sebastian Trueg <trueg@kde.org>
*/
class SOPRANO_EXPORT QueryResultIteratorBackend : public IteratorBackend<BindingSet>
{
public:
virtual ~QueryResultIteratorBackend();
/**
* For boolean results implementations needs to always return \p false to avoid
* endless loops in client applications that omit to check the result type.
*
* \sa QueryResultIterator::next
*/
virtual bool next() = 0;
/**
* The default implementation constructs the
* BindingSet using binding() and bindingNames()
*
* \sa QueryResultIterator::current
*/
virtual BindingSet current() const;
/**
* \sa QueryResultIterator::currentStatement
*/
virtual Statement currentStatement() const = 0;
/**
* \sa QueryResultIterator::binding(const QString&)
*/
virtual Node binding( const QString& name ) const = 0;
/**
* \sa QueryResultIterator::binding(int)
*/
virtual Node binding( int offset ) const = 0;
/**
* \sa QueryResultIterator::bindingCount
*/
virtual int bindingCount() const = 0;
/**
* \sa QueryResultIterator::bindingNames
*/
virtual QStringList bindingNames() const = 0;
/**
* \sa QueryResultIterator::isGraph
*/
virtual bool isGraph() const = 0;
/**
* \sa QueryResultIterator::isBinding
*/
virtual bool isBinding() const = 0;
/**
* \sa QueryResultIterator::isBool
*/
virtual bool isBool() const = 0;
/**
* \sa QueryResultIterator::boolValue
*/
virtual bool boolValue() const = 0;
protected:
QueryResultIteratorBackend();
};
}
#endif // SOPRANO_QUERY_RESULT_H
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