48 lines
880 B
C++
48 lines
880 B
C++
#ifndef SETFRAGMENTCURSOR_H_
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#define SETFRAGMENTCURSOR_H_
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#include <database/SetFragment.h>
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template<typename Data>
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class SetFragmentCursor {
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public:
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typedef Data ElementType;
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typedef size_t MarkerType;
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private:
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SetFragment<Data>* fragment;
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size_t currentGetIndex;
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public:
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explicit SetFragmentCursor(SetFragment<Data>& fragment)
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: fragment(&fragment), currentGetIndex(-1)
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{}
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bool step()
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{
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if (currentGetIndex + 1 >= fragment->size() )
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return false;
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currentGetIndex++;
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return true;
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}
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Data* get()
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{
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return &(*fragment)[currentGetIndex];
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}
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MarkerType mark() const
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{
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return currentGetIndex;
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}
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void restore(MarkerType mark)
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{
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currentGetIndex = mark - 1;
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step();
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}
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};
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#endif
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