org.apache.lucene.facet.search

Class FacetResult

java.lang.Object

org.apache.lucene.facet.search.FacetResult

public class FacetResult
extends Object

Result of faceted search.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Constructor Summary

Constructors

Constructor and Description
FacetResult(FacetRequest facetRequest, FacetResultNode rootNode, int numValidDescendants)

Method Summary

Methods

Modifier and Type	Method and Description
FacetRequest	getFacetRequest() Request for which this result was obtained.
FacetResultNode	getFacetResultNode() Facet result node matching the root of the facet request.
int	getNumValidDescendants() Number of descendants of root facet result node, up till the requested depth.
static List<FacetResult>	mergeHierarchies(List<FacetResult> results, TaxonomyReader taxoReader, Map<String,FacetArrays> dimArrays) A utility for merging multiple FacetResult of the same (hierarchical) dimension into a single FacetResult, to reconstruct the hierarchy.
String	toString()
String	toString(String prefix) String representation of this facet result.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

FacetResult

public FacetResult(FacetRequest facetRequest,
           FacetResultNode rootNode,
           int numValidDescendants)

Method Detail

mergeHierarchies

public static List<FacetResult> mergeHierarchies(List<FacetResult> results,
                                 TaxonomyReader taxoReader,
                                 Map<String,FacetArrays> dimArrays)
                                          throws IOException

A utility for merging multiple FacetResult of the same (hierarchical) dimension into a single FacetResult, to reconstruct the hierarchy. The results are merged according to the following rules:

• If two results share the same dimension (first component in their CategoryPath), they are merged.
• If a result is missing ancestors in the other results, e.g. A/B/C but no corresponding A or A/B, these nodes are 'filled' with their label, ordinal and value (obtained from the respective FacetArrays).
• If a result does not share a dimension with other results, it is returned as is.

NOTE: the returned results are not guaranteed to be in the same order of the input ones.

Parameters:

results - the results to merge

taxoReader - the TaxonomyReader to use when creating missing ancestor nodes

dimArrays - a mapping from a dimension to the respective FacetArrays from which to pull the nodes values

Throws:

IOException

getFacetResultNode

public final FacetResultNode getFacetResultNode()

Facet result node matching the root of the facet request.

See Also:

getFacetRequest(), FacetRequest.categoryPath

getNumValidDescendants

public final int getNumValidDescendants()

Number of descendants of root facet result node, up till the requested depth.

getFacetRequest

public final FacetRequest getFacetRequest()

Request for which this result was obtained.

toString

public String toString(String prefix)

String representation of this facet result. Use with caution: might return a very long string.

Parameters:

prefix - prefix for each result line

See Also:

toString()

toString

public String toString()

Overrides:

toString in class Object