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Mobile Devices Programming - MIDlet to Servlet Communication

Published Date: February 18, 2010
Author: Omer Guinko
 

This article is organized into seven sections. The first two sections are introductory material.

Sections 3 through 5 provide coverage of MIDP 2.0 API used in our Case Study (MIDlet to Servlet Communication).

Section 6 contains details about how MIDP applications send and receive data over the internet

Section 7 provides the complete source code of our Case Study.

case-study-sample

 
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Designing and Building a complete EJB3/JPA Application (Part I)

Published Date: February 16, 2010
Author: Omer Guinko
 

OG-News Management System (OG-NMS) - Version 1.0

In this article we will show how to design and build a complete EJB/Java EE system.

In particular you will learn how to use entities, session beans and message-driven beans together, and how to call EJB components from the JSF framework.

We will expose a stateless session bean as a web service for integration with the other applications.

We will first provide motivation for our deployment by describing the Business Problem and then we will design and implement the system.

 nms domain modeling

 
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Anisotropic and Isotropic mapping modes for Polygon Triangulation

Published Date: February 03, 2009
Author: Omer Guinko
 

In Many graphics applications, it is desirable to divide a polygon into triangles.

In this article starting with the section "Continuous vs. Discrete coordinates" you will be given a quick overview of device-coordinates system and logical coordinates system.


In section "Anisotropic and Isotropic mapping modes"  we will explore the mapping of an interval of real logical coordinates to a set  of integer device coordinates.

triangulation


Section "Point in Triangle Test Algorithm" explores the mathematical notion of a vector to determine the orientation of three points and completes the article with the polygon triangulation algorithm.