#include "CLucene/StdHeader.h"
#include "PhrasePositions.h"

#include "CLucene/index/Terms.h"

using namespace lucene::index;
namespace lucene{ namespace search{

	PhrasePositions::PhrasePositions(TermPositions& t, const int_t o):
		tp(&t),
		offset(o),
		position(0),
		count(0)
	{
		Next();
	}
	PhrasePositions::~PhrasePositions(){
		if ( next )
			delete next;

		if ( tp != NULL ){
			tp->close();
			delete tp;
			tp = NULL;
		}
	}

	void PhrasePositions::Next()  {	  // increments to next doc
		if (!tp->next()) {
			tp->close();				  // close stream
			delete tp;
			tp = NULL;
			doc = INT_MAX;			  // sentinel value
			return;
		}
		doc = tp->Doc();
		position = 0;
	}

	void PhrasePositions::firstPosition() {
		count = tp->Freq();				  // read first pos
		nextPosition();
	}

	bool PhrasePositions::nextPosition() {
		if (count-- > 0) {				  // read subsequent pos's
			position = tp->nextPosition() - offset;
			return true;
		} else
			return false;
	}
}}