public abstract class ValueSourceScorer extends Scorer
Scorer
which returns the result of FunctionValues.floatVal(int)
as
the score for a document, and which filters out documents that don't match matches(int)
.
This Scorer has a TwoPhaseIterator
. This is similar to FunctionQuery
,
but this one has no Weight
normalization factors/multipliers
and that one doesn't filter either.
Note: If the scores are needed, then the underlying value will probably be fetched/computed twice -- once to filter and next to return the score. If that's non-trivial then consider wrapping it in an implementation that will cache the current value.
FunctionQuery
Scorer.ChildScorer
Modifier and Type | Field and Description |
---|---|
protected FunctionValues |
values |
NO_MORE_DOCS
Modifier | Constructor and Description |
---|---|
protected |
ValueSourceScorer(IndexReader reader,
FunctionValues values) |
Modifier and Type | Method and Description |
---|---|
int |
advance(int target) |
TwoPhaseIterator |
asTwoPhaseIterator() |
long |
cost() |
int |
docID() |
int |
freq() |
abstract boolean |
matches(int doc)
Override to decide if this document matches.
|
int |
nextDoc() |
float |
score() |
getChildren, getWeight
all, empty, slowAdvance
protected final FunctionValues values
protected ValueSourceScorer(IndexReader reader, FunctionValues values)
public abstract boolean matches(int doc)
TwoPhaseIterator.matches()
.public TwoPhaseIterator asTwoPhaseIterator()
asTwoPhaseIterator
in class Scorer
public int docID()
docID
in class DocIdSetIterator
public int nextDoc() throws IOException
nextDoc
in class DocIdSetIterator
IOException
public int advance(int target) throws IOException
advance
in class DocIdSetIterator
IOException
public float score() throws IOException
score
in class Scorer
IOException
public int freq() throws IOException
freq
in class Scorer
IOException
public long cost()
cost
in class DocIdSetIterator
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