XMIParser

actor XMIParser

Overview

The XMI parser converts XMI files into EMF-compatible object graphs stored in Resources. It handles:

• Metamodel (.ecore) files with full Ecore support

• Model instance (.xmi) files with arbitrary user-defined attributes

• Dynamic attribute parsing without hardcoded attribute names

• Automatic type inference for Int, Double, Bool, and String values

• Cross-resource references via href attributes (creates ResourceProxy for external refs)

• XPath-style fragment identifiers

• Bidirectional reference resolution

Cross-Resource References

When parsing an href attribute with an external URI (e.g., href="department-b.xmi#/"), the parser creates a ResourceProxy instead of resolving immediately. The proxy can be resolved later using ResourceProxy.resolve(in:), which will automatically load the target resource if needed.

Same-resource references (e.g., href="#//@employees.0") are resolved to EUUID values during the two-pass parsing process.

Supported XMI Features

• XMI Version: 2.0 and later

• Ecore Metamodel: Full support for EPackage, EClass, EEnum, EDataType, EAttribute, EReference

• Dynamic Attributes: Arbitrary XML attributes parsed without hardcoding (EMF spec compliant)

• Type Inference: Automatic conversion of string values to Int, Double, Bool, or String

• References: Same-resource (#//ClassName) and external (ecore:Type http://…)

• Multiplicity: lowerBound and upperBound attributes

• Containment: Containment references and opposite references

• Default Values: defaultValueLiteral for attributes

Usage Example

let parser = XMIParser()
let resource = try await parser.parse(ecoreURL)
let roots = await resource.getRootObjects()