 Known Direct Subclasses
| CachingSpanFilter |
Wraps another SpanFilter's result and caches it. |
| SpanQueryFilter |
Constrains search results to only match those which also match a provided
query. |
|
Class Overview
Abstract base class providing a mechanism to restrict searches to a subset
of an index and also maintains and returns position information.
This is useful if you want to compare the positions from a SpanQuery with the positions of items in
a filter. For instance, if you had a SpanFilter that marked all the occurrences of the word "foo" in documents,
and then you entered a new SpanQuery containing bar, you could not only filter by the word foo, but you could
then compare position information for post processing.
Summary
| Public Methods |
|---|
|
abstract
SpanFilterResult
|
bitSpans(IndexReader reader)
Returns a SpanFilterResult with true for documents which should be permitted in
search results, and false for those that should not and Spans for where the true docs match.
|
Public Constructors
Public Methods
Returns a SpanFilterResult with true for documents which should be permitted in
search results, and false for those that should not and Spans for where the true docs match.
Parameters
| reader
| The IndexReader to load position and DocIdSet information from |
Throws
| IOException
| if there was an issue accessing the necessary information
|
