TermPositions* IndexReader::termPositions(Term* term){
//Func - Returns an enumeration of all the documents which contain term. For each
// document, in addition to the document number and frequency of the term in
// that document, a list of all of the ordinal positions of the term in the document
// is available. Thus, this method implements the mapping:
//
// Term => <docNum, freq,<pos 1, pos 2, ...pos freq-1>>*
//
// This positional information faciliates phrase and proximity searching.
// The enumeration is ordered by document number. Each document number is greater than
// all that precede it in the enumeration.
//Pre - term != NULL
//Post - A reference to TermPositions containing an enumeration of all found documents
// has been returned
CND_PRECONDITION(term != NULL, "term is NULL");
ensureOpen();
//Reference an instantiated termPositions instance
TermPositions* _termPositions = termPositions();
//Seek all documents containing term
_termPositions->seek(term);
//return the enumeration
return _termPositions;
}
MultipleTermPositions::MultipleTermPositions(IndexReaderPtr indexReader, Collection<TermPtr> terms)
{
Collection<TermPositionsPtr> termPositions(Collection<TermPositionsPtr>::newInstance());
for (Collection<TermPtr>::iterator term = terms.begin(); term != terms.end(); ++term)
termPositions.add(indexReader->termPositions(*term));
termPositionsQueue = newLucene<TermPositionsQueue>(termPositions);
posList = newLucene<IntQueue>();
_doc = 0;
_freq = 0;
}
TermPositionsPtr IndexReader::termPositions(const TermPtr& term) {
ensureOpen();
TermPositionsPtr _termPositions(termPositions());
_termPositions->seek(term);
return _termPositions;
}
