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java.lang.Object org.apache.lucene.facet.Facets org.apache.lucene.facet.sortedset.SortedSetDocValuesFacetCounts
public class SortedSetDocValuesFacetCounts
Compute facets counts from previously
indexed SortedSetDocValuesFacetField
,
without require a separate taxonomy index. Faceting is
a bit slower (~25%), and there is added cost on every
IndexReader
open to create a new SortedSetDocValuesReaderState
. Furthermore, this does
not support hierarchical facets; only flat (dimension +
label) facets, but it uses quite a bit less RAM to do
so.
NOTE: this class should be instantiated and
then used from a single thread, because it holds a
thread-private instance of SortedSetDocValues
.
NOTE:: tie-break is by unicode sort order
Constructor Summary | |
---|---|
SortedSetDocValuesFacetCounts(SortedSetDocValuesReaderState state,
FacetsCollector hits)
Sparse faceting: returns any dimension that had any hits, topCount labels per dimension. |
Method Summary | |
---|---|
List<FacetResult> |
getAllDims(int topN)
Returns topN labels for any dimension that had hits, sorted by the number of hits that dimension matched; this is used for "sparse" faceting, where many different dimensions were indexed, for example depending on the type of document. |
Number |
getSpecificValue(String dim,
String... path)
Return the count or value for a specific path. |
FacetResult |
getTopChildren(int topN,
String dim,
String... path)
Returns the topN child labels under the specified path. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public SortedSetDocValuesFacetCounts(SortedSetDocValuesReaderState state, FacetsCollector hits) throws IOException
IOException
Method Detail |
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public FacetResult getTopChildren(int topN, String dim, String... path) throws IOException
Facets
getTopChildren
in class Facets
IOException
public Number getSpecificValue(String dim, String... path)
Facets
getSpecificValue
in class Facets
public List<FacetResult> getAllDims(int topN) throws IOException
Facets
getAllDims
in class Facets
IOException
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