Structure

ATLExpressionXMIParser

Parses ATL/OCL expressions from Eclipse ATL XMI format.

struct ATLExpressionXMIParser

Overview

This parser reconstructs expression trees from the standard Eclipse ATL XMI representation, following the OCL metamodel structure.

Supported Expression Types

Literals: Integer, Real, String, Boolean, Undefined
Variables: Variable references
Navigation: Property and feature navigation
Operations: Binary, unary, and method call operations
Collections: Collection literals and iterator operations
Control Flow: Conditional (if-then-else) expressions
Advanced: Let expressions, lambda expressions, iterate expressions, tuples

XMI Format

Expressions are identified by xsi:type attributes:

<expression xsi:type="ocl:VariableExp" varName="x"/>
<expression xsi:type="ocl:IntegerExp" integerSymbol="42"/>

This parser uses a recursive descent approach with DOM-based XML parsing. Each expression type has a dedicated parsing method, eliminating shared state and naturally handling arbitrary nesting through recursion.

Topics

Initializers

init()

Creates a new expression XMI parser.

Instance Methods

parse(_:)

Parses an expression from XMI format.