程序包 dev.langchain4j.rag.content.aggregator

类 DefaultContentAggregator

java.lang.Object

dev.langchain4j.rag.content.aggregator.DefaultContentAggregator

所有已实现的接口:

ContentAggregator

public class DefaultContentAggregator
extends Object
implements ContentAggregator

Default implementation of ContentAggregator intended to be suitable for the majority of use cases.

It's important to note that while efforts will be made to avoid breaking changes, the default behavior of this class may be updated in the future if it's found that the current behavior does not adequately serve the majority of use cases. Such changes would be made to benefit both current and future users.

This implementation employs Reciprocal Rank Fusion (see ReciprocalRankFuser) in two stages to aggregate all Collection<List<Content>> into a single List<Content>. The Contents in both the input and output lists are expected to be sorted by relevance, with the most relevant Contents at the beginning of the List<Content>.
Stage 1: For each Query, all List<Content> retrieved with that Query are merged into a single List<Content>.
Stage 2: All List<Content> (results from stage 1) are merged into a single List<Content>.

Example:
Input (query -> multiple lists with ranked contents):

 home animals -> [cat, dog, hamster], [cat, parrot]
 domestic animals -> [dog, horse], [cat]
 

After stage 1 (query -> single list with ranked contents):

 home animals -> [cat, dog, parrot, hamster]
 domestic animals -> [dog, cat, horse]
 

After stage 2 (single list with ranked contents):

 [cat, dog, parrot, horse, hamster]
 

另请参阅:

• ReciprocalRankFuser
• ReRankingContentAggregator

构造器概要

构造器

构造器	说明
DefaultContentAggregator()

方法概要

修饰符和类型	方法	说明
List<Content>	aggregate(Map<Query,Collection<List<Content>>> queryToContents)	Aggregates all Contents retrieved by all ContentRetrievers using all Querys.
protected Map<Query,List<Content>>	fuse(Map<Query,Collection<List<Content>>> queryToContents)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

DefaultContentAggregator

public DefaultContentAggregator()

方法详细资料

aggregate

public List<Content> aggregate(Map<Query,Collection<List<Content>>> queryToContents)

从接口复制的说明: ContentAggregator

Aggregates all Contents retrieved by all ContentRetrievers using all Querys. The Contents, both on input and output, are sorted by relevance, with the most relevant Contents appearing at the beginning of List<Content>.

指定者:

aggregate 在接口中 ContentAggregator

参数:

queryToContents - A map from a Query to all List<Content> retrieved with that Query. Given that each Query can be routed to multiple ContentRetrievers, the value of this map is a Collection<List<Content>> rather than a simple List<Content>.

返回:

A list of aggregated Contents.

fuse

protected Map<Query,List<Content>> fuse(Map<Query,Collection<List<Content>>> queryToContents)