JavaProgramGenerator

Course project Random Java Program Generator

• Akshay Vedpathak
• Mohammed Noman Mulla
• Rohit Vibhu
• Sylvester Savio Raj

Overview

The project creates a syntactically correct but semantically meaningless Java application. The input to our main program is a configuration file that defines various parameters that constrain the generation of a Java application (e.g., the number of lines of code and the number of classes). Once the constrains are identified the program parses a grammar file that is the crux of random code generation.

We have used a BNF grammar format for the grammar file as shown below;

<expression>:=<access_type> <var> = <exp> <op> <exp>
<op>:=+ | - | *
<exp>:=<exp> <op> <exp> | <digit>
<class_name>:=<access_modifier> 'class' <class_name> '{' <expression> <class_method> '}'
<inheritence>:=<access_modifier> 'class' <class_name> 'implements' <previous_interface_name> '{' <interface_methods> <class_method> '}'
<class_method>:=<access_modifier> 'void' <method_name> '(' ')' '{' <for_loop> <expression> '}'

The program parses the grammar file: "src/resources/grammar.txt" and defines two levels;

1. Top-Level: These rules refer to various class and interface declarations
2. Low-Level: These refer to various programming constructs such as methods, loops, expressions etc.

Each generated java file contains atleast one element from high-level and multiple elements from the low-level, for which the bounds are specified in the configuration file.

The configuration file (src/main/resources/config.xml) serves the purpose of defining the bounds for various high and low level elements.

The flow of our application is as below;

Setup and Running the project

1. Clone the project from https://github.com/rohit0710/JavaProgramGenerator.git
2. Import the project in Intellij
3. Run gradle and SBT build by running the following commands;
   • Gradle Build: Run command gradle build on Terminal in Intellij
   • SBT Build: Run command compile on the SBT Shell in Intellij
4. Run the main class ProgramGenerator.java, post successful run the generated java files are created and added in the directory /generatedCode

Implementation Details

1. Using Queues to Process Class,Interfaces, Inheritence, Methods and Loops
2. Further, Uses Stacks to Process Expressions within Methods and Loops.