Code Generators

BESSER offers a suite of code generators designed for diverse technologies and purposes. These generators play a pivotal role in translating your model, created using the B-UML Language, into executable code suitable for various applications.

Note

Most generators consume structural models (class diagrams). Some generators require additional model types (GUI, agent, quantum, deployment) as noted below.

Choosing a Generator

Generator	Input Model	Output	Use When
Full Web App	Structural + GUI	ZIP (React + FastAPI)	You want a complete web application with frontend, backend, and database
Django	Structural	ZIP (Django project)	You want a Django admin panel with ORM models
Backend (FastAPI)	Structural	ZIP (FastAPI + SQLAlchemy)	You need only a REST API backend without frontend
REST API	Structural	Python files	You need API endpoints and Pydantic models without database setup
Python	Structural	.py	You need plain Python classes from your model
Pydantic	Structural	.py	You need Pydantic validation models with OCL constraints
Test Cases	Structural	.py (pytest + Hypothesis)	You want an auto-generated pytest + Hypothesis test suite for your model
Java	Structural	.java files	You need Java class files
SQL	Structural	.sql	You need DDL statements for any SQL dialect
SQLAlchemy	Structural	.py	You need SQLAlchemy ORM models
JSON Schema	Structural	.json	You need JSON Schema or Smart Data Models
RDF	Structural	.ttl	You need an RDF vocabulary in Turtle format
React	Structural + GUI	ZIP	You need only the React frontend (no backend)
Flutter	Structural + GUI	ZIP	You need a Flutter mobile application
Terraform	Deployment	ZIP	You need infrastructure-as-code for AWS or GCP
PyTorch	Neural Network	.py	You need a PyTorch neural network
TensorFlow	Neural Network	.py	You need a TensorFlow neural network
Qiskit	Quantum Circuit	.py	You need Qiskit quantum circuit code
BAF Agent	Agent	ZIP	You need a BESSER Agentic Framework conversational agent
BAF Agent (personalized)	Agent + UserDiagram	ZIP	You want a BAF agent adapted to an end-user profile (language, style, accessibility, modality); see Agent Personalization
BPMN	BPMN	.bpmn (XML)	You need vendor-neutral BPMN 2.0 XML readable by every BPMN-aware tool
Docker Compose	Deployment	.yml	You need a docker-compose.yml to run a swarm (deploy.replicas: N from the diagram multiplicity)

Web Application

Generate complete web applications with frontend, backend, and database:

• Full Web App Generator
  • Overview
  • Sub-Generators
  • Multi-Diagram Projects
  • Multi-agent projects
  • How It Works
  • Generated Output Structure
  • Features
  • Running Your App
  • Customization

Frameworks & Languages

Generate code for various frameworks and programming languages:

• Django Generator
• Backend Generator
• REST API Generator
• Python Classes Generator
• Pydantic Classes Generator
• Test Case Generator
• Java Classes Generator
• Flutter Generator (deprecated)
• React Generator

Data & API

Generate database schemas, APIs, and data formats:

• SQL Schema Generator
• SQLAlchemy Generator
• JSON Schema Generator
• RDF Generator
• Terraform Generator

Machine Learning

Generate machine learning model code:

• Pytorch Generator
• TensorFlow Generator

Quantum Computing

Generate quantum circuit code:

• Qiskit Generator

Agents

Generate conversational agents:

• BESSER Agentic Framework (BAF) Generator
• Agent Personalization

Business Process

Generate BPMN 2.0 XML for any BPMN-aware engine or modeller:

• BPMN Generator

Build Your Own

Create custom code generators:

• Build Your Own Generator