tsqlqueryormapperiterator.h

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#pragma once
#include <TSqlQueryORMapper>
 
 
template <class T>
class TSqlQueryORMapperIterator {
public:
    TSqlQueryORMapperIterator(TSqlQueryORMapper<T> &mapper) :
        m(&mapper), it(0) { }
 
    bool hasNext() const { return (it >= 0 && it < m->size()); }
    bool hasPrevious() const { return (it > 0 && it <= m->size()); }
    T next();
    T previous();
    void toBack()
    {
        m->last();
        it = m->size();
    }
    void toFront()
    {
        m->first();
        it = 0;
    }
    T value() const { return m->value(); }
 
private:
    TSqlQueryORMapperIterator(const TSqlQueryORMapperIterator<T> &);
    TSqlQueryORMapperIterator<T> &operator=(const TSqlQueryORMapperIterator<T> &);
 
    TSqlQueryORMapper<T> *m;
    int it;
};
 
 
template <class T>
inline T TSqlQueryORMapperIterator<T>::next()
{
    if (it++ != m->at()) {
        m->next();
    }
    return m->value();
}
 
template <class T>
inline T TSqlQueryORMapperIterator<T>::previous()
{
    if (--it != m->at()) {
        m->previous();
    }
    return m->value();
}