Areek Zillur created LUCENE-5294:
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Summary: Suggester InputIterator implementation that takes
expressions as term weights
Key: LUCENE-5294
URL: https://issues.apache.org/jira/browse/LUCENE-5294
Project: Lucene - Core
Issue Type: New Feature
Components: core/search
Reporter: Areek Zillur
It would be nice to have a Suggester inputIter implementation that could
compute the weights of the terms consumed by the suggester based on an
user-defined expression (using lucene's expression module).
It could be an extension of the existing DocumentDictionary (which takes terms,
weights and (optionally) payloads from the stored documents in the index). The
only exception being that instead of taking the weights for the terms from the
specified weight fields, it could compute the weights using an user-defn
expression, that uses one or more NumicDocValuesField from the document.
Example:
let the document have
- product_id
- product_name
- product_popularity
- product_profit
then this implementation could be used with an expression of
"0.2*product_popularity + 0.8*product_profit" to determine the weights of the
terms for the corresponding documents (optionally along with a payload
(product_id))
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