---
layout: developer-doc
title: JVM Object Generation
category: parser
tags: [parser, jvm, object-generation]
order: 9
---

# JVM Object Generation

The JVM object generation phase is responsible for creating JVM-native objects
representing the parser AST from the rust-native AST. This is required to allow
the compiler and runtime to work with the AST.

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# Overall Architecture

The JVM foreign function interface (FFI), named
[Java Native Interface](https://en.wikipedia.org/wiki/Java_Native_Interface)
(JNI), enables the Rust parser library to call and be called by the parser
library implemented in Scala.

Specifically, in our architecture, the JNI is used for:

- Invoking Rust parser methods from Scala.
- Invoking Scala AST constructors from Rust.