Interface DocumentJoiner

All Superinterfaces:

Function<Map<Query, List<List<Document>>>, List<Document>>

All Known Implementing Classes:

ConcatenationDocumentJoiner

public interface DocumentJoiner
extends Function<Map<Query, List<List<Document>>>, List<Document>>

A component for combining documents retrieved based on multiple queries and from multiple data sources into a single collection of documents. As part of the joining process, it can also handle duplicate documents and reciprocal ranking strategies.

Since:

1.0.0

Author:

Thomas Vitale

Method Summary

Modifier and Type	Method	Description
default List<Document>	apply(Map<Query, List<List<Document>>> documentsForQuery)
List<Document>	join(Map<Query, List<List<Document>>> documentsForQuery)	Joins documents retrieved across multiple queries and daa sources.

Methods inherited from interface Function

andThen, compose

Method Details

join

List<Document> join(Map<Query, List<List<Document>>> documentsForQuery)

Joins documents retrieved across multiple queries and daa sources.

Parameters:

documentsForQuery - a map of queries and the corresponding list of documents retrieved

Returns:

a single collection of documents

apply

default List<Document> apply(Map<Query, List<List<Document>>> documentsForQuery)

Specified by:

apply in interface Function<Map<Query, List<List<Document>>>, List<Document>>