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README.md

Overview

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

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

Status

Build Status Maven Central Javadoc Tidelift

Maven dependency

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>2.9.0</version>
</dependency>

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

Usage: registering 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.

To use Jackson with Jersey see their documentation.

Usage: registering supporting datatypes module

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 = new ObjectMapper();
mapper.registerModule(new Jaxrs2TypesModule());
// 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.

Annotations on resources

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

Module Considerations

  • 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  java.ws.rs; //Newer libraries
requires  jakarta.ws.rs.api; //Reserved name for Jakarta Impl

Support

Community support

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

Enterprise support

Available as part of the Tidelift Subscription.

The maintainers of jackson-jaxrs-providers and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source dependencies you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use. Learn more.


Other

For documentation, downloads links, check out Wiki

About

Multi-module project that contains Jackson-based JAX-RS providers for JSON, XML, YAML, Smile, CBOR formats

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