Drop Project's code itself follows the Maven folder structure.

The following figure represents DP's folder/directory structure. Below the figure, a description of the contents of each sub-folder is given.

. src
+-- main
+-- kotlin
+---- org.dropProject
+------ controllers
+------ dao 
+------ data
+------ extensions
+------ filters
+------ repositories
+------ security
+------ services
+-- test
+---- kotlin
+---- org.dropProject
+------ controllers
+------ dao
+------ data
+------ ...
+------ other test folders

src/main/kotlin/drop-project/controllers

Contains code related with handling HTTP requests.

src/main/kotlin/drop-project/dao

Contains the Data Access Object classes. This is where you will find the Assignment and Submission classes.

src/main/kotlin/drop-project/data

Contains auxiliary classes used in session.

src/main/kotlin/drop-project/extensions

Code that extends certain classes of the Java API (e.g. Date).

src/main/kotlin/drop-project/filters

Classes that intercept and pre-process HTTP requests.

src/main/kotlin/drop-project/repositories

Code that defines functions/interfaces to find persisted objects.

src/main/kotlin/drop-project/security

Contains access control definitions.

src/main/kotlin/drop-project/services

Business logic code.

src/test/kotlin/drop-project/controllers

Contains tests for controllers.

src/test/kotlin/drop-project/dao

Contains tests for Data Access Object classes.

src/test/kotlin/drop-project/data

Contains tests for the auxiliary classes .

src/test/kotlin/drop-project/...

Tests for other packages.