protected class

ConstantScoreQuery.ConstantScorer

extends Scorer
java.lang.Object
   ↳ org.apache.lucene.search.DocIdSetIterator
     ↳ org.apache.lucene.search.Scorer
       ↳ org.apache.lucene.search.ConstantScoreQuery.ConstantScorer

Summary

[Expand]
Inherited Constants
From class org.apache.lucene.search.DocIdSetIterator
Public Constructors
ConstantScoreQuery.ConstantScorer(Similarity similarity, IndexReader reader, Weight w)
Public Methods
int advance(int target)
Advances to the first beyond the current whose document number is greater than or equal to target.
int docID()
Returns the following:
int nextDoc()
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.
float score()
Returns the score of the current document matching the query.
[Expand]
Inherited Methods
From class org.apache.lucene.search.Scorer
From class org.apache.lucene.search.DocIdSetIterator
From class java.lang.Object

Public Constructors

public ConstantScoreQuery.ConstantScorer (Similarity similarity, IndexReader reader, Weight w)

Throws
IOException

Public Methods

public int advance (int target)

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;
 }
 
Some implementations are considerably more efficient than that.

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.

Throws
IOException

public int docID ()

Returns the following:

public int nextDoc ()

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.

Throws
IOException

public float score ()

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).

Throws
IOException