mdd4j's Introduction

mdd4j

Code Generator for Model Driven Design.

Goals

Simplifies enterprise/business application development by taking a model driven approach.

Why code generator?

There're many application frameworks and libraries out there. Why should I care about code generator?

There're many problems/aspects to concern when building enterprise application.

UI for PC, mobile devices.
Security, AAA
Application service.
data access/infrasture integration.
...

each has it's own set of specialized tools to solve that.

however, we still have to code each of those aspects manually, and assemble those pieces together to make up the whole application. they are no more than just different forms/representations of one common business model, and can be deduced from that model, maybe manually, or automatically.

Problems in application development

entities have many forms -- persistence, value object in application service layer, value object in front end(PC browser, mobile devices, etc.) are the 'same' but in different forms of reprensentation.
application constants. constants in business level, also have many forms of representation -- javascript constants, java(or any other programming languages), rdbms... each of those constants share the same name, have the same value, but in different forms.
adding/removing, or changing object/field names is not easy. refactorying tools are good, but not enough, because they are implemented in different languages/tools. i.e field names in rdbms table columns vs json vs java object. if a weak type/dynamic programming language is used, that would be a nightmare.
application behavior also penertrating all these layers.
functional requirements share common paradim, just different in terms of object/field name/count.

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