Package dev.langchain4j.rag.query.router

Interface QueryRouter

All Known Implementing Classes:

DefaultQueryRouter, LanguageModelQueryRouter

public interface QueryRouter

Routes the given Query to one or multiple ContentRetrievers.
The goal is to ensure that Content is retrieved only from relevant data sources.
Some potential approaches include:

 - Using an LLM (see LanguageModelQueryRouter)
 - Using an EmbeddingModel (aka "semantic routing", see EmbeddingModelTextClassifier in the langchain4j module)
 - Using keyword-based routing
 - Route depending on the user (query.metadata().chatMemoryId()) and/or permissions
 

See Also:

• DefaultQueryRouter
• LanguageModelQueryRouter

Method Summary

Modifier and Type	Method	Description
Collection<ContentRetriever>	route(Query query)	Routes the given Query to one or multiple ContentRetrievers.

Method Details

route

Collection<ContentRetriever> route(Query query)

Routes the given Query to one or multiple ContentRetrievers.

Parameters:

query - The Query to be routed.

Returns:

A collection of one or more ContentRetrievers to which the Query should be routed.