org.apache.lucene.facet.search.results

Interface FacetResultNode

All Known Implementing Classes:

MutableFacetResultNode

public interface FacetResultNode

Result of faceted search for a certain taxonomy node.

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

Method Summary

Methods

Modifier and Type	Method and Description
CategoryPath	getLabel() Category path of the category of this result, or null if not computed, because the application did not request to compute it.
CategoryPath	getLabel(TaxonomyReader taxonomyReader) Category path of the category of this result.
int	getNumSubResults() Number of sub results
int	getOrdinal() Ordinal of the category of this result.
double	getResidue() Value of screened out sub results.
Iterable<? extends FacetResultNode>	getSubResults() Contained sub results.
double	getValue() Value of this result - usually either count or a value derived from some computing on the association of it.
void	setValue(double value) Expert: Set a new value for this result node.
String	toString(String prefix) String representation of this facet result node.

Method Detail

toString

String toString(String prefix)

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

Parameters:

prefix - prefix for each result line

getOrdinal

int getOrdinal()

Ordinal of the category of this result.

getLabel

CategoryPath getLabel()

Category path of the category of this result, or null if not computed, because the application did not request to compute it. To force computing the label in case not yet computed use getLabel(TaxonomyReader).

See Also:

FacetRequest.getNumLabel(), getLabel(TaxonomyReader)

getLabel

CategoryPath getLabel(TaxonomyReader taxonomyReader)
                      throws IOException

Category path of the category of this result. If not already computed, will be computed now.

Use with caution: loading a label for results is costly, performance wise. Therefore force labels loading only when really needed.

Parameters:

taxonomyReader - taxonomy reader for forcing (lazy) labeling of this result.

Throws:

IOException - on error

See Also:

FacetRequest.getNumLabel()

getValue

double getValue()

Value of this result - usually either count or a value derived from some computing on the association of it.

getResidue

double getResidue()

Value of screened out sub results.

If only part of valid results are returned, e.g. because top K were requested, provide info on "what else is there under this result node".

getSubResults

Iterable<? extends FacetResultNode> getSubResults()

Contained sub results. These are either child facets, if a tree result was requested, or simply descendants, in case tree result was not requested. In the first case, all returned are both descendants of this node in the taxonomy and siblings of each other in the taxonomy. In the latter case they are only guaranteed to be descendants of this node in the taxonomy.

getNumSubResults

int getNumSubResults()

Number of sub results

setValue

void setValue(double value)

Expert: Set a new value for this result node.

Allows to modify the value of this facet node. Used for example to tune a sampled value, e.g. by SampleFixer.fixResult(org.apache.lucene.facet.search.ScoredDocIDs, FacetResult)

Parameters:

value - the new value to set

See Also:

getValue(), FacetResultsHandler.rearrangeFacetResult(FacetResult)