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CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

PlantUML is a tool that allows users to create UML diagrams from plain text descriptions. It supports various diagram types including sequence, class, activity, component, state diagrams, and more.

Build and Test Commands

# Build the project
gradle build

# Run tests
gradle test

Code Style Guidelines

  • Java Version: Java 8 compatibility is required. Do not use var, lambda features beyond Java 8, or other post-Java 8 syntax.
  • Indentation: Use tabs for indentation, not spaces.
  • Braces:
    • Opening braces on the same line as the statement.
    • For if/for/while with a single statement: no braces, statement on the next line with indentation.
    • For blocks with multiple statements: braces required, opening brace on the same line.
  • Imports: Explicit imports, no wildcard imports.
  • Final variables: Prefer final for local variables when possible.
  • Boolean negation: Prefer positive conditions (foo == false) over negation operators (!foo).

Architecture Notes

  • Main source code is in src/main/java/net/sourceforge/plantuml/
  • The project uses a custom preprocessor and parser for PlantUML syntax

Packages to avoid modifying

Generated code (do not modify):

  • gen - generated code
  • h - generated code

External/third-party packages (do not modify):

  • jcckit - external charting library
  • zext - external library
  • org.stathissideris - external library (ditaa)