I got the idea from a different repo https://github.com/josueribeiro/sqlite-jpa but it was horribly outdated (hibernate 3.5) and did just not work so i set up my own.
Why did i set up that project? Well, I wanted to test several tools that claimed to be able to build (JPA) Entity classes from an existimg datamodel (meaning from actual tables in a database). But it turned out - none of them could (out of the box) and I was not patient enough to comb through arcane configuration files.
Remembering that i had the sQLshell having numerous plugins already to document existing models starting from a table and then following all foreign key relationships, I thought it should be possible to actually generate java source code instead of HTML.
The most important things for me were:
- gather all tables connected by foreign key relationships and generate Entities for them
- generate the relationships (One2Many and Many2One) according to the foreign keys
- extract index information if available but leave it commented out
- detect Many2Many mappings and generate annotations for them so that they are usable later on
This project already contains some tests for some of the models I tested the plugin with. Over time, more and more tests will be added here.
So i sat down and tried my hand at it - with the results everyone can see in this project.
The generated Entities are below package
de.elbosso.generated.sqlshell.
bikestores contains the result I got from a MS SQL example database:
chinook contains the results i got from the example database for sqlite.
entities holds the results from an example in a HSQL database sourced from here.
inheritance contains a datamodel meant for testing inheritance strategies in JPA (using HSQLDB - SQL for creating the model is here
