Package org.apache.juneau.marshall.jsonl

package org.apache.juneau.marshall.jsonl

JSONL (JSON Lines) marshalling support.

JSONL is a text format where each line is a valid JSON value, separated by newline characters. It is the standard format for LLM fine-tuning datasets, streaming AI inference, log aggregation, and bulk data pipelines.

This package provides JsonlSerializer and JsonlParser which extend the JSON serializer/parser to produce and consume newline-delimited JSON.

Example:

// Serialize a list of beans to JSONL String jsonl = Jsonl.of(myList); // Parse JSONL back to a list List<MyBean> list = Jsonl.to(jsonl, List.class, MyBean.class);

See Also:

• JSON Lines Specification

Related Packages

Package	Description
org.apache.juneau.marshall	Marshalling API

Class	Description
JsonlConfig	Annotation for specifying config properties for REST classes and methods using JSONL.
JsonlConfigAnnotation	Utility classes and methods for the @JsonlConfig annotation.
JsonlConfigAnnotation.ParserApply	Applies JsonlConfig annotations to a JsonParser.Builder.
JsonlConfigAnnotation.SerializerApply	Applies JsonlConfig annotations to a JsonSerializer.Builder.
JsonlParser	Parses JSONL (JSON Lines) input into POJO models.
JsonlParserSession	Session object that lives for the duration of a single use of JsonlParser.
JsonlParserSession.Builder	Builder class.
JsonlSerializer	Serializes POJO models to JSONL (JSON Lines).
JsonlSerializerSession	Session object that lives for the duration of a single use of JsonlSerializer.
JsonlSerializerSession.Builder	Builder class.
JsonlTokenReader	Reference implementation of the public TokenReader surface for the JSONL / NDJSON format.
JsonlTokenWriter	Reference implementation of the public TokenWriter surface for the JSONL / NDJSON format.