AQL

Overview

AQL provides a powerful expression language for querying and navigating ECore models. It supports navigation, collection operations, string manipulation, and type operations, making it ideal for model-driven engineering tasks.

This implementation follows the https://eclipse.dev/acceleo/documentation/ and is based on https://www.omg.org/spec/OCL/ semantics, whilst providing a type-safe Swift API for integration with the ECore metamodelling framework.

Key Features

• Model navigation: Traverse models using intuitive dot notation

• Collection operations: Filter, map, and aggregate collections

• String operations: Comprehensive string manipulation

• Type operations: Type checking, casting, and reflection

• Boolean logic: Full support for logical expressions

• Conditionals: If-then-else expressions

Quick Example

import AQL
import ECore

// Create execution context
let engine = ECoreExecutionEngine(models: ["model": myModel])
let context = AQLExecutionContext(executionEngine: engine)

// Parse a query
let parser = AQLParser()
let query = try parser.parse("self.attributes->select(a | a.isRequired)")

// Evaluate against a model element
let result = try await query.evaluate(in: context, self: myClass)