Uses of Interface
org.apache.tika.parser.inference.Engine

Packages that use Engine

Package	Description
org.apache.tika.inference
org.apache.tika.parser.enricher	Engines a container parser invokes on bytes it has already parsed: text recognizers (OCR, transcription) and annotators.
org.apache.tika.parser.inference	Inference bindings: what is offered to which engine, buffered per document tree and run at its end.
org.apache.tika.parser.ocr
org.apache.tika.parser.ocr.tess4j
org.apache.tika.parser.ocrencode
org.apache.tika.parser.vlm

Uses of Engine in org.apache.tika.inference

Subinterfaces of Engine in org.apache.tika.inference

Modifier and Type	Interface	Description
interface	EmbeddingEngine	An engine that turns images into vectors, many per request.

Classes in org.apache.tika.inference that implement Engine

Modifier and Type	Class	Description
class	OpenAIEmbeddingEngine	An OpenAI-compatible embeddings endpoint (POST /v1/embeddings), named in "engines".
class	OpenAIImageEmbeddingParser	Deprecated. since 4.1.0, removed in 4.2.0.

Methods in org.apache.tika.inference with parameters of type Engine

Modifier and Type	Method	Description
void	EmbedTask.run(InferenceBinding binding, List<InferenceUnit> units, Engine engine, ParseContext context)
void	EmbedTask.validate(InferenceBinding binding, Engine engine)

Uses of Engine in org.apache.tika.parser.enricher

Subinterfaces of Engine in org.apache.tika.parser.enricher

Modifier and Type	Interface	Description
interface	ContentEnricher	A Parser a container parser invokes on bytes it has already parsed (OCR on an image, an embedding of a rendered page) rather than one the composite dispatches to; its supported types are the types it can enrich.
interface	TextRecognizer	A content enricher whose output is the document's text: what the image, audio, or video says, written into the caller's body as content the caller may treat as its own.

Uses of Engine in org.apache.tika.parser.inference

Methods in org.apache.tika.parser.inference that return Engine

Modifier and Type	Method	Description
Engine	InferenceDispatcher.Bound.engine()	Returns the value of the engine record component.
Engine	EngineRegistry.get(String name)

Methods in org.apache.tika.parser.inference that return types with arguments of type Engine

Modifier and Type	Method	Description
Map<String,Engine>	EngineRegistry.getEngines()

Methods in org.apache.tika.parser.inference with parameters of type Engine

Modifier and Type	Method	Description
void	InferenceTask.run(InferenceBinding binding, List<InferenceUnit> units, Engine engine, ParseContext context)
default void	InferenceTask.validate(InferenceBinding binding, Engine engine)	Rejects an engine this task cannot use; called once at config load.

Constructors in org.apache.tika.parser.inference with parameters of type Engine

Modifier	Constructor	Description
	Bound(InferenceBinding binding, Engine engine, List<InferenceTask> tasks)	Creates an instance of a Bound record class.

Constructor parameters in org.apache.tika.parser.inference with type arguments of type Engine

Modifier	Constructor	Description
	EngineRegistry(Map<String,Engine> engines)

Uses of Engine in org.apache.tika.parser.ocr

Classes in org.apache.tika.parser.ocr that implement Engine

Modifier and Type	Class	Description
class	TesseractOCRParser	TesseractOCRParser powered by tesseract-ocr engine.

Uses of Engine in org.apache.tika.parser.ocr.tess4j

Classes in org.apache.tika.parser.ocr.tess4j that implement Engine

Modifier and Type	Class	Description
class	Tess4JParser	OCR parser using Tess4J, which provides a Java JNA wrapper around the native Tesseract library.

Uses of Engine in org.apache.tika.parser.ocrencode

Classes in org.apache.tika.parser.ocrencode that implement Engine

Modifier and Type	Class	Description
class	EncodeOCRParser	Parser that base64-encodes image content instead of performing OCR text extraction.

Uses of Engine in org.apache.tika.parser.vlm

Classes in org.apache.tika.parser.vlm that implement Engine

Modifier and Type	Class	Description
class	AbstractVLMParser	Abstract base class for parsers that delegate to a remote Vision-Language Model (VLM) endpoint for OCR and document understanding.
class	ClaudeVLMParser	VLM parser for the Anthropic Claude Messages API.
class	GeminiVLMParser	VLM parser for the Google Gemini generateContent API.
class	OpenAIVLMParser	VLM parser for OpenAI-compatible chat completions endpoints (OpenAI, Azure OpenAI, OpenRouter, vLLM, Ollama, LiteLLM, Together AI, Groq, Fireworks, Mistral, NVIDIA NIM, Jina, local FastAPI wrappers, etc.).