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This is a multi-module project that contains Jackson-based JAX-RS (*) providers for following data formats:

• JSON
• Smile (binary JSON)
• CBOR (another kind of binary JSON)
• XML
• YAML

Providers implement JAX-RS MessageBodyReader and MessageBodyWriter handlers for specific data formats. They also contain SPI settings for auto-registration.

(*) NOTE! JAX-RS is the "old" API defined under javax.ws.rs; in 2019 or so, Oracle decided to force a forking of this into "Jakarta" variant under jakarta.ws.ws. As of 2021 most frameworks still use the old API but if you do need/want to use newer one, check out Jakarta-RS provider repo at jackson-jakarta-rs-providers

To use JAX-RS on Maven-based projects, use dependencies like:

<dependency>
  <groupId>com.fasterxml.jackson.jaxrs</groupId>
  <artifactId>jackson-jaxrs-json-provider</artifactId>
  <version>2.15.0</version>
</dependency>

(above is for JSON provider; modify appropriately for other providers)

Due to auto-registration, it should be possible to simply add Maven dependency (or include jar if using other build systems) and let JAX-RS implementation discover provider. If this does not work you need to consult documentation of the JAX-RS implementation for details.

Here are some links that may help:

• Configure Jackson as JSON Provider in JAX-RS 2.0
• JAX-RS and Open Liberty: BYO Jackson
• Using Jackson as JSON provider in Jersey 2.x

Starting with Jackson 2.8, there is a small supporting datatype module, jackson-datatype-jaxrs (see under datatypes/). It will not be auto-registered automatically (unless user calls ObjectMapper.findAndRegisterModules()); instead, user has to register it by normal means:

ObjectMapper mapper = JsonMapper.builder() // or whichever format backend we have
    .addModule(new Jaxrs2TypesModule())
    .build();
// and then register mapper with JAX-RS provider(s)

and ensuring that configured mapper is used by JAX-RS providers.

It is possible that later versions of providers may offer additional ways to get datatype module registered.

In addition to annotation value classes, it is also possible to use a subset of Jackson annotations with provider.

Here is a short list of supported annotations that work with all formats:

• @JsonView can be used to define active view for specific endpoint
• @JsonRootName can be used to specify alternate rootname; most often used with XML, but possibly with JSON as well.
• @JacksonAnnotationsInside meta-annotation may be used as a marker, to create "annotation bundles", similar to how they are used with value type annotations
• com.fasterxml.jackson.jaxrs.annotation.JacksonFeatures can be used with all provid to enable/disable
  • SerializationFeature / DeserializationFeature for data-binding configuration
  • JsonParser.Feature / JsonGenerator.Feature for low(er) level Streaming read/write options

In addition there are format-specific annotations that may be used:

• JSON has:
  • com.fasterxml.jackson.jaxrs.json.annotation.JSONP to define JSONP wrapping for serialized result

The JSON/JAX-RS module has multiple names depending on the version in use. To enable modular usage, add the requires statement that pertains directly to the implementation you are using.

requires  javax.ws.rs.api; //Older libraries
requires  jakarta.ws.rs; //Newer libraries

Starting with Jackson 2.13, there is a fully separate set of providers for "Jakarta-RS", see: jackson-jakarta-rs-providers. They would be instead included with:

<dependency>
    <groupId>com.fasterxml.jackson.jakarta.rs</groupId>
    <artifactId>jackson-jakarta-rs-json-provider</artifactId>
</dependency>

NOTE! Jackson 2.12 has (just for that version), jakarta classifier variant of JAXB providers included here.

You may be able to use these variants by using dependency like:

<dependency>
    <groupId>com.fasterxml.jackson.jaxrs</groupId>
    <artifactId>jackson-jaxrs-json</artifactId>
    <version>2.12.6</version>
    <classifier>jakarta</classifier>
</dependency>

but this mechanism was removed from later versions.

Jackson components are supported by the Jackson community through mailing lists, Gitter forum, Github issues. See Participation, Contributing for full details.

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