SpanScorer

Advances to the first beyond the current whose document number is greater than or equal to target. Returns the current document number or NO_MORE_DOCS if there are no more docs in the set.

Behaves as if written:

 int advance(int target) {
   int doc;
   while ((doc = nextDoc()) < target) {
   }
   return doc;
 }
 

NOTE: certain implementations may return a different value (each time) if called several times in a row with the same target.

NOTE: this method may be called with {@value #NO_MORE_DOCS} for efficiency by some Scorers. If your implementation cannot efficiently determine that it should exhaust, it is recommended that you check for that value in each call to this method.

NOTE: after the iterator has exhausted you should not call this method, as it may result in unpredicted behavior.

Returns the following:

• -1 or NO_MORE_DOCS if nextDoc() or advance(int) were not called yet.
• NO_MORE_DOCS if the iterator has exhausted.
• Otherwise it should return the doc ID it is currently on.

Advances to the next document in the set and returns the doc it is currently on, or NO_MORE_DOCS if there are no more docs in the set.
NOTE: after the iterator has exhausted you should not call this method, as it may result in unpredicted behavior.

Returns the score of the current document matching the query. Initially invalid, until nextDoc() or advance(int) is called the first time, or when called from within collect(int).

This method is no longer an official member of Scorer, but it is needed by SpanWeight to build an explanation.