Maliang

Maliang(马良), the name of this project comes from a character of folk tail in China who has a magical brush by which he can draw any thing and turn it to real thing.

Motivation

In most of J2EE projet, there are a lot of codes are about CRUD which refer to the basic functions of a database or persistence layer in a software system. By using Maliang, you can generate these template codes based on your DDL

CREATE TABLE `user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(32) DEFAULT NULL,
  `age` int(11) DEFAULT NULL,
  `sex` varchar(2) DEFAULT NULL,
  PRIMARY KEY (`id`)
)

Under the hood

Maliang use sql parser to parser DDL, then convert the result to a VelocityContext.
The SourceCodeGenerator.generate(VelocityContext context) will generate the code with the template and output directory, so acctually you could generate code with your own context builder and your own tempalte.

Some rules

1. Directroy and File Name The SourceCodeGenerator will replace automatically replace the directory path and the file name with the value in VelocityContext. Suppose you have a template file called /${basepackage}/${name}Dao.java, and in the context the ${basepackage} equals com.github.maliang and the ${name} equals jadetang, you will get a new file /com/github/maliang/jadetangDao.java

2. Database table naming convention Usually we name the database objects in a different way comparing we name the java objects, with the custom config file, you can control how the database object name are converted to the java object name.Here is a config examle

name {
  separator = "T_APP"
  table.prefix = "F"
  column.prefix = "_"
}