Add AI-powered search features

[Strift]

Pull Request

Related issue

Fixes #817

What does this PR do?

Update settings to handle embedders

Docs: https://www.meilisearch.com/docs/reference/api/settings#embedders

Update the methods getEmbedders, updateEmbedders, resetEmbedders. Also, the method updateSettings should be able to accept the new embedders parameter.

Here is the list of fields in the embedders object:

• source sub field is available and accepts: ollama, rest, openAI, huggingFace and userProvided
• apiKey sub field is available (string) - optional because not compatible with all sources. Only for openAi, ollama, rest.
• model sub field is available (string) - optional because not compatible with all sources. Only for ollama, openAI, huggingFace
• documentTemplate sub field is available (string) - optional
• dimensions - optional because not compatible with all sources. Only for openAi, huggingFace, ollama, and rest
• distribution - optional
• request - mandatory only if using rest embedder
• response - mandatory only if using rest embedder
• documentTemplateMaxBytes - optional
• revision - optional, only for huggingFace
• headers - optional, only for rest
• binaryQuantized - optional

Update search to handle vector search and hybrid search

Docs: https://www.meilisearch.com/docs/reference/api/search

Update the search method::

• hybrid search parameter, with sub fields semanticRatio and embedder. embedder is mandatory if hybrid is set.
• vector parameter is available
• retrieveVectors parameter available
• semanticHitCount in search response
• Accept _semanticScore in the search response (optional)
• vector should be returned in the search response, but optional (because depends on search parameters)
• _vectors present in the search response, but optional

Add similar documents endpoint

Docs: https://www.meilisearch.com/docs/reference/api/similar

• Implement searchSimilarDocuments associated with the POST /indexes/:uid/similar. Do NOT implement with GET.

PR checklist

Please check if your PR fulfills the following requirements:

• Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
• Have you read the contributing guidelines?
• Have you made sure that the title is accurate and descriptive of the changes?

Thank you so much for contributing to Meilisearch!

[Copilot]

Pull Request Overview

This PR adds AI-powered search capabilities to Meilisearch by introducing new embedders settings, hybrid search parameters, and vector search support.

• Updated the settings API to include embedders configuration.
• Enhanced search and similar document endpoints with hybrid and vector search features.
• Added and updated tests for embedders, hybrid search, and vector search.

Reviewed Changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/test/java/com/meilisearch/sdk/SimilarDocumentRequestTest.java	Added tests for SimilarDocumentRequest with various parameters including embedder and vector retrieval.
src/test/java/com/meilisearch/sdk/SearchRequestTest.java	Introduced hybrid search and retrieveVectors tests.
src/test/java/com/meilisearch/integration/TasksTest.java	Improved assertions for tasks retrieval.
src/test/java/com/meilisearch/integration/SettingsTest.java	Added tests verifying get, update, and reset embedders settings.
src/test/java/com/meilisearch/integration/SearchTest.java	Added integration tests for vector search and retrieveVectors feature.
src/main/java/com/meilisearch/sdk/model/Settings.java	Updated embedders type from Embedders to Embedder.
src/main/java/com/meilisearch/sdk/model/SearchResult.java	Added _vectors field to support vector search responses.
src/main/java/com/meilisearch/sdk/model/Hybrid.java	Introduced a new Hybrid class for hybrid search configuration.
src/main/java/com/meilisearch/sdk/model/Embedder.java	New file defining Embedder configurations with embedders related fields.
src/main/java/com/meilisearch/sdk/SimilarDocumentRequest.java	Refactored JSON conversion using null-safe putOpt.
src/main/java/com/meilisearch/sdk/SettingsHandler.java	Added methods to get, update, and reset embedders settings.
src/main/java/com/meilisearch/sdk/SearchRequest.java	Extended to support hybrid search, vector search, and retrieveVectors.
src/main/java/com/meilisearch/sdk/IndexSearchRequest.java	Enhanced to include retrieveVectors parameter in search requests.
src/main/java/com/meilisearch/sdk/Index.java	Added wrapper methods for embedders settings management.
.github/workflows/tests.yml	Minor update to enable more verbose Gradle output during tests.