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Javier Paniza

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Top Stories by Javier Paniza

This article tries to demonstrate that Java can be more productive than Ruby. We are going to develop the same application of the article Rolling with Ruby on Rails Revisited (part 1 [1] and part 2 [2]) but using POJO [3]s annotated with JPA [4] and a Model Driven Framework, OpenXava [5] in this case. The result is that with less code, and less time you obtain a more powerful application. Ruby and rails: The regressive framework Ruby on rails [6] is so elegant, so easy, so productive. I cannot avoid read and heard continuously these comments. For example, the article Rolling with Ruby on Rails Revisited of Bill Walton says: “What would you think if I told you that you can develop a web application at least ten times faster with Rails than you can with a typical Java framework?” Oops! Ten times faster! Well, after these comments I decided to learn Ruby on Rails. I ne... (more)

OpenXava 4.6: Rapid Java Web Development

OpenXava is a framework for Rapid Java Web Development, well-suited for business and database oriented applications. OpenXava allows you to develop applications just by writing simple domain classes with Java or Groovy. The user interface is generated automatically in runtime, without code generation. OpenXava 4.6 has some new interesting features such as: Custom reports generation from list. It's possible to customize the list mode defining your own editor. You can assign a model object (an entity or a transient object) directly to a View to populate it. In the jUnit tests you ca... (more)

Automatic User Interface with OpenXava: An Evolutionary Option for GUIs

This is a story about creating a user interface easily, or better yet, about having good user interfaces without working for them. The Problem Once upon a time, you created a really cool invoicing application. Your wonderful application had an agile MS-DOS (or Unix, or AS/400, or HOST) character interface, but your users demanded a Windows interface: more beautiful, and easier to use. So, you rewrote your application to have a Windows user interface. All OK, but then your users asked you for a multiplatform application, so you rewrote your application in Java with AWT, but your ... (more)

OpenXava 3.1.4 Released

OpenXava 3.1.4 is a framework focused in productivity for developing business Java applications. The idea is that you write only your POJOs annotated with JPA and you get an application ready for production. With OpenXava, you only need to write your model, POJOs and Java annotations. You do not need to write the view, and the controller (for CRUD, printing, etc) is reused. And from that you'll have an application for CRUD, report generation in PDF, export to Excel, searching, sorting, validations etc. You only need to write a simple Java class, no XMLs, no JSPs and no code gene... (more)

Book "Learn OpenXava by examples" Available

The goal of this book is to teach you how to develop Java Enterprise applications with OpenXava and other Java-related technologies, tools and frameworks. The way to achieve this goal is developing an application from scratch, step-by-step, until your application will be complete. In this book you'll learn, not only OpenXava, but JPA, Eclipse, PostgreSQL, JUnit, HtmlUnit, Hibernate Validator framework, Liferay, etc. And more important, you're going to learn techniques to solve common and advanced cases you'll face developing business applications. Get the book! ... (more)