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Jina

Introduction​

A reranker is an advanced AI model that takes the initial set of results from a search—often provided by an embeddings/token-based search—and reevaluates them to ensure they align more closely with the user's intent. It looks beyond the surface-level matching of terms to consider the deeper interaction between the search query and the content of the documents.

Maven Dependency​

<dependency>
    <groupId>dev.langchain4j</groupId>
    <artifactId>langchain4j-jina</artifactId>
    <version>0.36.2</version>
</dependency>

Usage​



ScoringModel scoringModel = JinaScoringModel.builder()
    .apiKey(System.getenv("JINA_API_KEY"))
    .modelName("jina-reranker-v2-base-multilingual")
    .build();

ContentAggregator contentAggregator = ReRankingContentAggregator.builder()
    .scoringModel(scoringModel)
    ... 
    .build();

RetrievalAugmentor retrievalAugmentor = DefaultRetrievalAugmentor.builder()
    ...
    .contentAggregator(contentAggregator)
    .build();

return AiServices.builder(Assistant.class)
    .chatLanguageModel(...)
    .retrievalAugmentor(retrievalAugmentor)
    .build();