Validating data is a common task that is copied in many different layers of an application, from the presentation tier to the persistence layer. Many times the exact same validations will have to be implemented in each separate validation framework, proving time consuming and error-prone. To prevent having to re-implement these validations at each layer, many developers will bundle validations directly into their classes, cluttering them with copied validation code that is, in fact, meta-data about the class itself.
This JSR will define a meta-data model and API for JavaBean validation. The default meta-data source will be annotations, with the ability to override and extend the meta-data through the use of XML validation descriptors. It is expected that the common cases will be easily accomplished using the annotations, while more complex validations or context-aware validation configuration will be available in the XML validation descriptors.
The validation API developed by this JSR will not be specific to any one tier or programming model. It will specifically not be tied to either the web tier or the persistence tier, and will be available for both server-side application programming, as well as rich client Swing application developers. This API is seen as a general extension to the JavaBeans object model, and as such is expected to be used as a core component in other specifications, such as JSF, JPA, and Bean Binding.
After graduating from Supelec (French "Grande Ecole"), Emmanuel has spent a few years in the retail industry where he started to be involved in the ORM space. He joined the Hibernate team 4 years ago and is now a core developer at JBoss, a division of Red Hat.
Emmanuel is the lead developer of Hibernate Annotations and Hibernate EntityManager, two key projects on top of Hibernate core implementing the Java Persistence(tm) specification, as well as Hibernate Search and Validator.
Emmanuel is a member of the EJB 3.0 expert group and the JSR 303: Bean Validation expert group. He is a regular speaker at various conferences and JUGs, including JavaOne, JBoss World and JAX.
Large scale development of enterprise java solutions— You will get some insights into the development process at the NetWeaver Product Technology Unit and SAP applications build on top of the NetWeaver platform. We will share how we build large scale enterprise java solutions at SAP.
Java persistence - a Heretic's demonstration— The Java world is a thriving 'think tank' where the future of computing is created, a place of open-minded exploration. Nevertheless, there are taboos that the Java world seems reluctant to address. Weakly typed languages was one that has been confronted only recently, with JSR223. Object-oriented databases attract a lot of sympathy and precious little support. Everything that would stray too far away from the 'canon' of Java and JavaEE is, in reality, often considered with suspicion.
Guice— Put simply, Guice alleviates the need for factories and the use of new in your Java code. Think of Guice's @Inject as the new new. You will still need to write factories in some cases, but your code will not depend directly on them. Your code will be easier to change, unit test and reuse in other contexts.
Leading Open Source Middleware in Action— OW2 Members present and demonstrate leading OW2 projects working together to provide a full-featured open source information system based on Exo, XWiki, Bonita, JOnAS, SpagoBI, Talend, PEtALS, Orchestra and Spegic.
JSR 314 - JavaServer Faces 2.0— JavaServer Faces 2.0 (JSR 314) will bring the best ideas in web application development to the Java EE platform. This presentation by co-spec. lead Ed Burns gives you an overview of what you can expect in the near JSF future.
