abstract class ConjunctionSpans extends Spans
Modifier and Type | Field and Description |
---|---|
(package private) boolean |
atFirstInCurrentDoc |
(package private) DocIdSetIterator |
conjunction |
(package private) boolean |
oneExhaustedInCurrentDoc |
(package private) Spans[] |
subSpans |
NO_MORE_POSITIONS
NO_MORE_DOCS
Constructor and Description |
---|
ConjunctionSpans(java.util.List<Spans> subSpans) |
Modifier and Type | Method and Description |
---|---|
int |
advance(int target)
Advances to the first beyond the current whose document number is greater
than or equal to target, and returns the document number itself.
|
TwoPhaseIterator |
asTwoPhaseIterator()
Return a
TwoPhaseIterator view of this ConjunctionSpans. |
long |
cost()
Returns the estimated cost of this
DocIdSetIterator . |
int |
docID()
Returns the following:
-1 if DocIdSetIterator.nextDoc() or
DocIdSetIterator.advance(int) were not called yet. |
Spans[] |
getSubSpans() |
int |
nextDoc()
Advances to the next document in the set and returns the doc it is
currently on, or
DocIdSetIterator.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. |
float |
positionsCost()
Return an estimation of the cost of using the positions of
this
Spans for any single document, but only after
Spans.asTwoPhaseIterator() returned null . |
(package private) int |
toMatchDoc() |
(package private) abstract boolean |
twoPhaseCurrentDocMatches() |
collect, doCurrentSpans, doStartCurrentDoc, endPosition, nextStartPosition, startPosition, toString, width
all, empty, range, slowAdvance
final Spans[] subSpans
final DocIdSetIterator conjunction
boolean atFirstInCurrentDoc
boolean oneExhaustedInCurrentDoc
ConjunctionSpans(java.util.List<Spans> subSpans)
public int docID()
DocIdSetIterator
-1
if DocIdSetIterator.nextDoc()
or
DocIdSetIterator.advance(int)
were not called yet.
DocIdSetIterator.NO_MORE_DOCS
if the iterator has exhausted.
docID
in class DocIdSetIterator
public long cost()
DocIdSetIterator
DocIdSetIterator
.
This is generally an upper bound of the number of documents this iterator might match, but may be a rough heuristic, hardcoded value, or otherwise completely inaccurate.
cost
in class DocIdSetIterator
public int nextDoc() throws java.io.IOException
DocIdSetIterator
DocIdSetIterator.NO_MORE_DOCS
if there are no more docs in the
set.nextDoc
in class DocIdSetIterator
java.io.IOException
public int advance(int target) throws java.io.IOException
DocIdSetIterator
DocIdSetIterator.NO_MORE_DOCS
if target
is greater than the highest document number in the set.
The behavior of this method is undefined when called with
target ≤ current
, or after the iterator has exhausted.
Both cases may result in unpredicted behavior.
When target > current
it 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: this method may be called with DocIdSetIterator.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.
advance
in class DocIdSetIterator
java.io.IOException
int toMatchDoc() throws java.io.IOException
java.io.IOException
abstract boolean twoPhaseCurrentDocMatches() throws java.io.IOException
java.io.IOException
public TwoPhaseIterator asTwoPhaseIterator()
TwoPhaseIterator
view of this ConjunctionSpans.asTwoPhaseIterator
in class Spans
Scorer.twoPhaseIterator()
public float positionsCost()
Spans
Spans
for any single document, but only after
Spans.asTwoPhaseIterator()
returned null
.
Otherwise this method should not be called.
The returned value is independent of the current document.positionsCost
in class Spans
public Spans[] getSubSpans()