| Package | Description |
|---|---|
| org.apache.lucene.search |
Code to search indices.
|
| org.apache.lucene.search.similarities |
This package contains the various ranking models that can be used in Lucene.
|
| Modifier and Type | Method and Description |
|---|---|
CollectionStatistics |
IndexSearcher.collectionStatistics(String field)
Returns
CollectionStatistics for a field. |
| Modifier and Type | Method and Description |
|---|---|
protected float |
BM25Similarity.avgFieldLength(CollectionStatistics collectionStats)
The default implementation computes the average as
sumTotalTermFreq / maxDoc,
or returns 1 if the index does not store sumTotalTermFreq (Lucene 3.x indexes
or any field that omits frequency information). |
Similarity.SimWeight |
MultiSimilarity.computeWeight(float queryBoost,
CollectionStatistics collectionStats,
TermStatistics... termStats) |
Similarity.SimWeight |
PerFieldSimilarityWrapper.computeWeight(float queryBoost,
CollectionStatistics collectionStats,
TermStatistics... termStats) |
abstract Similarity.SimWeight |
Similarity.computeWeight(float queryBoost,
CollectionStatistics collectionStats,
TermStatistics... termStats)
Compute any collection-level weight (e.g.
|
Similarity.SimWeight |
SimilarityBase.computeWeight(float queryBoost,
CollectionStatistics collectionStats,
TermStatistics... termStats) |
Similarity.SimWeight |
BM25Similarity.computeWeight(float queryBoost,
CollectionStatistics collectionStats,
TermStatistics... termStats) |
Similarity.SimWeight |
TFIDFSimilarity.computeWeight(float queryBoost,
CollectionStatistics collectionStats,
TermStatistics... termStats) |
protected void |
LMSimilarity.fillBasicStats(BasicStats stats,
CollectionStatistics collectionStats,
TermStatistics termStats)
Computes the collection probability of the current term in addition to the
usual statistics.
|
protected void |
SimilarityBase.fillBasicStats(BasicStats stats,
CollectionStatistics collectionStats,
TermStatistics termStats)
Fills all member fields defined in
BasicStats in stats. |
Explanation |
BM25Similarity.idfExplain(CollectionStatistics collectionStats,
TermStatistics termStats)
Computes a score factor for a simple term and returns an explanation
for that score factor.
|
Explanation |
TFIDFSimilarity.idfExplain(CollectionStatistics collectionStats,
TermStatistics termStats)
Computes a score factor for a simple term and returns an explanation
for that score factor.
|
Explanation |
BM25Similarity.idfExplain(CollectionStatistics collectionStats,
TermStatistics[] termStats)
Computes a score factor for a phrase.
|
Explanation |
TFIDFSimilarity.idfExplain(CollectionStatistics collectionStats,
TermStatistics[] termStats)
Computes a score factor for a phrase.
|
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