/usr/include/tulip/uniqueiterator.h is in libtulip-dev 4.6.0dfsg-2+b5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* This file is part of Tulip (www.tulip-software.org)
*
* Authors: David Auber and the Tulip development Team
* from LaBRI, University of Bordeaux
*
* Tulip is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* Tulip 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 General Public License for more details.
*
*/
///@cond DOXYGEN_HIDDEN
#ifndef UNIQUEITERATOR_H
#define UNIQUEITERATOR_H
#include <set>
#include <tulip/memorypool.h>
//===============================================================================
namespace tlp {
/**
* \brief that class implement a default functor that always return true
*
* @see UniqueIterator
*/
template <typename TYPE>
class CheckAllFunctor {
bool operator()(const TYPE &) {
return true;
}
};
/**
* @class UniqueIterator
* @ingroup Iterators
*
* @brief UniqueIterator enables to remove duplicated elements in an iterator
*
* @param it the iterator in which we want to filter out duplicated elements
* @param checkFuncor a functor that enable to indicate wheter or not the element could be duplicated (default test all elements)
*
* The functor function shoul have the following form
* @code
* class ACheckFunctor {
* bool operator(TYPE a) {
* return true if a could be duplicated else false;
* }
* };
* @endcode
* checkFunctor are used for optimization purpose to prevent to log(n) test for all elements when not necessary.
*/
template <typename TYPE, typename TOCHECKFUNCTOR = CheckAllFunctor<TYPE> >
class UniqueIterator : public Iterator<TYPE> {
public:
UniqueIterator(Iterator<TYPE> *it, TOCHECKFUNCTOR checkFunctor = TOCHECKFUNCTOR()):_it(it), _checkFunctor(checkFunctor) {
update();
}
//================================================
~UniqueIterator() {
delete _it;
}
//================================================
TYPE next() {
TYPE tmp = curVal;
update();
return tmp;
}
//================================================
inline bool hasNext() {
return _hasNext;
}
//================================================
void update() {
_hasNext = false;
while(_it->hasNext()) {
curVal = _it->next();
if (_checkFunctor(curVal) ) {
if (_flag.find(curVal) == _flag.end()) {
_hasNext = true;
_flag.insert(curVal);
return;
}
}
else {
_hasNext = true;
return;
}
}
}
private:
std::set<TYPE> _flag;
bool _hasNext;
Iterator<TYPE> *_it;
TYPE curVal;
TOCHECKFUNCTOR _checkFunctor;
};
/**
* @class MPUniqueIterator
* @ingroup Iterators
* @brief MPUniqueIterator implements memory pool for UniqueIterator
* @warning never inherit from that class
* @see UniqueIterator
*/
template <typename TYPE, typename TOCHECKFUNCTOR = CheckAllFunctor<TYPE> >
class MPUniqueIterator : public UniqueIterator<TYPE, TOCHECKFUNCTOR> ,
public MemoryPool<MPUniqueIterator<TYPE, TOCHECKFUNCTOR> > {
public:
MPUniqueIterator(Iterator<TYPE> *it, TOCHECKFUNCTOR checkFunctor = TOCHECKFUNCTOR()):
UniqueIterator<TYPE, TOCHECKFUNCTOR>(it, checkFunctor) {
}
};
}
#endif // UNIQUEITERATOR_H
///@endcond
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