[LUCENE-6702] [suggest] Make Context Query and Field extensible

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 6.0
• Fix Version/s: 5.3, 6.0
• Component/s: core/other
• Lucene Fields: New, Patch Available
• Assignee: Areek Zillur
• Reporter: Areek Zillur
• Created: 29/Jul/15 06:41
• Updated: 09/May/16 18:30
• Resolved: 30/Jul/15 20:14

Description

ContextSuggestField indexes context information along with
suggestions, which can be used to filter and/or boost suggestions using
ContextQuery.
It would be useful to make ContextSuggestField extensible such that subclasses
can inject context values at index-time, without having to specify the
contexts in its ctor.
ContextQuery can be made extensible by allowing sub-classes to override
how context automaton is created from provided query contexts.
Currently, ContextQuery uses a context value of "*" to consider all context values,
It makes sense to have a dedicated addAllContexts() instead.