How to process OCL Abstract Syntax Trees

The Model Development Tools Object Constraint Language (MDT OCL) project provides the building blocks for Model-Driven tools to weave OCL declarative specifications into software artifacts. We showcase some of these possibilities, taking as starting point a plug-in to visualize OCL abstract syntax trees (ASTs) in the form of annotated trees. This example motivates some practical tips about patterns for OCL visitors, including using Java 5 generics and achieving conciseness by letting MDT OCL take care of the "walking" order. To really reap the benefits of OCL-enriched specifications, tools in our modeling chain have to be able to transform such expressions into the target software platform (e.g. compile into Java, translate into SQL). Work in this area is summarized, to ease jump-starting your own OCL processing project.

Categories: Model-Driven Development (MDD), Modeling, AST

[html] Eclipse Corner Article
June 2007
by Miguel Garcia