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Add-on module for Jackson JSON processor which handles Google Guava (http://code.google.com/p/guava-libraries/) datatypes (collections)
Java
Branch: master

Minor tweaks to #79

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README.md

Jackson module (jar) to support JSON serialization and deserialization of Guava data types.

Status

Build Status

Module has been production-ready since version 2.3. Not all datatypes of Guava are support due to sheer size of the library; new support is added based on contributions.

License

Apache License 2.0

Usage

Maven dependency

To use module on Maven-based projects, use following dependency:

<dependency>
  <groupId>com.fasterxml.jackson.datatype</groupId>
  <artifactId>jackson-datatype-guava</artifactId>
  <version>2.4.0</version>
</dependency>

(or whatever version is most up-to-date at the moment)

Registering module

Like all standard Jackson modules (libraries that implement Module interface), registration is done as follows:

ObjectMapper mapper = new ObjectMapper()
    .registerModule(new GuavaModule());

after which functionality is available for all normal Jackson operations.

Configuration

Configurable settings of the module are:

  • configureAbsentsAsNulls (default: true) (added in 2.6)
    • If enabled, will consider Optional.absent() to be "null-equivalent", and NOT serialized if inclusion is defined as Include.NON_NULL
    • If disabled, Optional.absent() behaves as standard referential type, and is included with Include.NON_NULL
    • In either case, Optional.absent() values are always excluded with Inclusion values of:
      • NON_EMPTY
      • NON_ABSENT (new in Jackson 2.6)

More

See Wiki for more information (javadocs, downloads).

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