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LionWeb Java Architecture Overview

Project Structure​

LionWeb Java is organized into several modules, each with a specific responsibility:

Core Module​

The core module implements the definition of nodes and languages. It provides:

  • Core data structures and interfaces
  • JSON serialization/deserialization
  • Basic validation and processing capabilities

Repository Client Module​

The repository client module provides:

  • Client-side implementation of the LionWeb repository protocol
  • Support for delta protocol
  • Integration with LionWeb repositories

Extensions module​

Capabilities that, while not required by the LionWeb specs, proved to be useful. For example, serialization and deserialization in ProtoBuf and FlatBuffers format.

EMF Module​

The EMF module provides bidirectional conversion between:

  • LionCore ↔ Ecore
  • LionWeb ↔ EMF This enables integration with Eclipse Modeling Framework.

EMF Builtins Module​

This module defines Ecore equivalents for LionCore's built-in elements that don't have direct Ecore representations.

Key Design Principles​

We want to do boring stuff that works. This project is about providing the reliable, foundational capabilities for you to build interesting things.

Dependencies​

  • Java 8+ (runtime)
  • Java 11+ (build)

Version Support​

The project currently supports:

  • LionWeb 2023.1
  • LionWeb 2024.1

Future Considerations​

The architecture is designed to accommodate:

  • New LionWeb specification versions
  • Additional integration points
  • Performance optimizations