Ankur created LUCENE-9444:
-----------------------------
Summary: Need an API to easily fetch facet labels for a field in a
document
Key: LUCENE-9444
URL: https://issues.apache.org/jira/browse/LUCENE-9444
Project: Lucene - Core
Issue Type: Improvement
Components: modules/facet
Affects Versions: 8.6
Reporter: Ankur
A facet field may be included in the list of fields whose values are to be
returned for each hit.
In order to get the facet labels for each hit we need to
# Create an instance of _DocValuesOrdinalsReader_ and invoke
_getReader(LeafReaderContext context)_ method to obtain an instance of
_OrdinalsSegmentReader()_
# _OrdinalsSegmentReader.get(int docID, IntsRef ordinals)_ method is then used
to fetch and decode the binary payload in the document's BinaryDocValues field.
This provides the ordinals that refer to facet labels in the taxonomy.**
# Lastly TaxonomyReader.getPath(ord) is used to fetch the labels to be
returned.
Ideally there should be a simple API - *String[] getLabels(docId)* that hides
all the above details and gives us the string labels. This can be part of
*TaxonomyFacets* but that's just one idea.
I am opening this issue to get community feedback and suggestions.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
