mkarg/jotal

The Java Open Type Adapters Library provides common off-the-shelf drop-in type mapping adapters for frameworks like JAX-RS, JPA, JAXB, and JSON-B.

jotal

The Java Open Type Adapters Library provides common off-the-shelf drop-in type mapping adapters for frameworks like JAX-RS, JPA, JAXB, and JSON-B. This not only includes mappings for common JRE types like Instant, URL or Image, but also the ability to implement custom type adapters once that fit into all four framework! Ain't that great? :-)

Why you want jotal

Annoyed by JPA's inability to deal with Instant or Image, effectively forcing you to write a type adapter for JRE common classes? Bugged by re-implementing your custom type adapter four times to make it work with not only JPA but also with JAX-RS, JAXB and JSON-B? Then jotal is what you want!

What jotal does

jotal not only provides default type adapters for JRE common classes working with JAX-RS, JPA, JAXB and JSON-B, it actually contains a framework which makes it pretty easy to use any existing type mapping technology (like Apache Commons Convert, Google Guava Converter, or simply any custom lambda expression) and turn it into a type conversion adapter. It's just second's and the conversion runs well in all these frameworks!

How jotal works

Pure java, no magic, but dead simple: jotal comes with abstract conversion adapters implementing all the named technology in one place. The included JRE type adapters (or your custom ones) just extend these by providing callbacks to the super constructor. It cannot be simpler.