odata4j is a new open-source toolkit for building first-class OData producers and first-class OData consumers in Java.

There is a vast amount of data available today and data is now being collected and stored at a rate never seen before. Much of this data is managed by Java server applications and difficult to access or integrate into new uses.

The Open Data Protocol (OData) is a Web protocol for querying and updating data that provides a way to unlock this data and free it from silos that exist in applications today. OData does this by applying and building upon Web technologies such as HTTP, Atom Publishing Protocol (AtomPub) and JSON to provide access to information from a variety of applications, services, and stores.

odata4J: Goals and Guidelines

    * Build on top of existing Java standards (e.g. JAX-RS, JPA, StAX) and use top shelf Java open-source components (jersey, Joda Time)
    * OData consumers should run equally well under constrained Java client environments, specifically Android
    * OData producers should run equally well under constrained Java server environments, specifically Google AppEngine