ARText - Driving Developments with Xtext

The document discusses best practices for implementing programming languages including: defining the grammar, scoping rules, validation, execution, and editor integration. It provides tips on using syntactic predicates over backtracking, data types instead of terminals, concise modular grammars, leveraging indexes for scoping, loose grammars with strict validation, dependency injection, and emphasizing testing.

Code retreat @BMW Car IT

Sebastian Benz

1. The document summarizes the key points of a code retreat session focused on writing perfect code for Conway's Game of Life simulation through test-driven development. 2. The retreat is divided into sessions that focus on object-oriented design, test-driving code, and ensuring clean code through good naming and short method implementations. 3. The goal is to destroy and rebuild the code multiple times with each iteration focusing on a different aspect of clean, well-tested code.

Scoping

This document discusses scoping, linking, and indexing in Xtext. It provides an overview of containment references versus cross references, and how cross references are implemented in DSL grammars and Xtext editors through features like hyperlinking, validation, content assist, and find references. It then covers the three main uses of scopes in Xtext: linking, content assist, and serializing. Details are given on the default scoping configuration and how scopes are implemented, including name qualification, imports, and cross-file references using the index.

The document discusses computer programming scopes. It defines scope as the part of a program where a name binding is valid, where the name can be used to refer to an entity. Outside of the scope, the name may refer to a different entity or nothing at all. Scope is also known as visibility, from the perspective of the referenced entity. Scope refers to the set of all visible entities or valid names within a portion of a program.

Java Performance MythBusters

1) The document discusses several Java performance myths and uses microbenchmarks to analyze them. It finds that final variables and String concatenation are not necessarily faster than alternatives. 2) It recommends using the Caliper framework for robust microbenchmarking and provides several useful JVM flags for profiling and optimization. 3) The document outlines various Java optimization strategies used by the JVM compiler including inlining, intrinsics, escape analysis, and loop unrolling. It emphasizes the importance of clear and readable code over premature optimization.

Getting rid of backtracking

The document discusses parsing in Xtext and strategies for dealing with ambiguities and non-LL(*) decisions in grammars. It begins by explaining LL parsing and lookahead in Xtext. It then covers different types of ambiguities that can occur and strategies for resolving them like changing syntax, enabling backtracking, or using syntactic predicates. Finally, it discusses non-LL(*) decisions that occur due to recursion and how they can be addressed through syntactic predicates or left-factoring with actions.

Extending the Xbase Typesystem

The Xtext Grammar Language

Xtext Grammar Language describes how to define grammars for the Xtext language development framework. Key points include: - Grammars define the structure and elements of a language through rules like Statemachine, Event, and Transition. - Terminals split text into tokens while hidden terminals are ignored by the parser. Datatype rules return values instead of objects. - The parser creates EObjects when rules assign to the current pointer. Actions ensure object creation when no assignment occurs. - Issues like ambiguities, left recursion, and left factoring can be resolved through techniques like keywords, predicates, and assigned actions. - The grammar maps language structures to Ecore classes and features through rule return types

Recipes to build Code Generators for Non-Xtext Models with Xtend

This document discusses code generators for non-Xtext models using Xtend. It provides an overview of creating minimal generators using JSON and Xtend templates, and more full-featured generators using the Xtext framework and EMF models. Key aspects covered include model navigation in Xtend templates, extensions, dynamic dispatch, IDE support, modularization, dependency injection, and incremental generation.

EMF - Beyond The Basics

The document discusses the Eclipse Modeling Framework (EMF). It describes how EMF can be used to create Ecore models from Java, XML Schema, UML, or MOF. EMF provides a runtime library to process Ecore models and instances. It also allows generating Java code from Ecore models. The document provides examples of Ecore metamodels and model instances, and explains concepts like proxies, lazy loading, fragments, transactions and global singletons in EMF.

EMF Tips n Tricks

Kaniska Mandal

This document provides tips and best practices for using the Eclipse Modeling Framework (EMF). It discusses designing a model provider API, using item providers, working with the common command framework, reloading working models, finding EMF references, why notifications are called adapters, resource proxies, on-demand loading, useful commands, the role of the editing domain, optimizing Ecore models, defining custom data types, maintaining in-memory lists, creating unique lists, suppressing object creation, controlling command appearance, using custom adapter factories, refreshing viewers and selections, using item providers for labels and content, registering custom resource factories, encrypting/decrypting streams, querying XML data using EMF, serializing QNames, loading resources

DSLs for Java Developers

Serializing EMF models with Xtext

meysholdt

The document discusses serializing EMF models with Xtext. It covers: - The new Xtext serializer is better than the old one in terms of errors, performance and deprecation. - Serialization is used for quickfixes, refactoring, persistence, generators and more. It guarantees syntactical correctness and handles comments/whitespace. - The serializer must parse a serialized model back to the original, and serialize modifications with minimal textual diffs. Ambiguities can cause parsing/serialization mismatches. - The architecture uses state machines and observer pattern. Hooks allow customizing cross-references, keywords, values and more during serialization.

Graphical Views For Xtext With FXDiagram

FXDiagram is a diagramming framework based on Eclipse Graphiti that focuses on user experience by providing flawless graphics, smooth behavior, self-explaining interactions, and easy content selection with good defaults and little customization. It integrates with Xtext and adds a thin diagram layer on top with a high-level mapping API to enable bi-directional mapping between diagrams and models without the quirks of other frameworks.

Xtend - A Language Made for Java Developers

This document introduces Xtend, a programming language created for Java developers. Xtend aims to improve on Java by incorporating features from other JVM languages while maintaining 100% Java interoperability. Key features include Java's type system and libraries, IDE support, functional programming capabilities, extension methods, and exceptional domain-specific language support through the use of active annotations that can participate in compilation and enhance derived Java code. The document concludes with a thank you and information about the creators of Xtend.

Jazoon 2010 - Building DSLs with Eclipse

Peter Friese

The document discusses building domain-specific languages (DSLs) with Eclipse. It introduces DSLs and their benefits, including raising the level of abstraction and focusing on solving specific problems. It then presents Xtext, an Eclipse framework for defining grammars and generating languages, parsers, and editors. Xtext allows defining a DSL using a grammar, which is then used to generate a meta-model, parser, and base editor infrastructure for the language.

Graphical Views For Xtext

This document discusses options for creating graphical views for Xtext models. It recommends using unidirectional mapping from models to diagrams to keep views read-only and simple. Graphviz is recommended for its simplicity and powerful layout algorithms. Zest provides views based on GEF with additional configuration options. Building custom GEF views allows maximum freedom but has rendering limitations. JavaFX overcomes GEF limitations and has an intuitive API. The conclusion recommends focusing on usability, using graphical views to avoid editor issues, and leveraging modern frameworks with custom behavior.

Enhancing Xtext for General Purpose Languages

University of York

Research work presented at MoDELS Doctoral Symposium (2014) focused on providing tools complementary to Xtext in order to reduce the amount of hand-written artifacts required to give support to General Purpose Languages. The research is focused on providing high level of abstraction languages to complement Xtext grammars, so that the current amount of hand written source code required to give support to General Purpose Languages is automatically generated from those higher level of abstraction languages. In particular, the aforementioned languages will capture information mostly related to: a) Name Resolution b) Syntax rewrites This research is contextualized on the OCL and QVT specifications. One of the goals is to provide Xtext-based high quality parsers and editors for the Eclipse OCL and Eclipse QVTo projects.

Eclipse DemoCamp in Paris: Language Development with Xtext

From Stairway to Heaven onto the Highway to Hell with Xtext

Xtext, diagrams and ux

This document discusses user experience (UX) in the context of Xtext and diagram editors. It outlines some of the key ingredients of good UX, like usability and consistency. When using diagram frameworks with Xtext, quirks can arise which impact the UX. However, by taking control over UX with tools like FXDiagram, these quirks can be avoided and the user experience improved. The document promotes UX as important for why users like products and advocates taking back control over UX.

What's Cooking in Xtext 2.0

The document discusses a language IDE framework called Xtext that allows users to define their own domain-specific languages. Xtext can generate a full IDE for a custom language, including features like syntax highlighting, code completion, and validation. It also discusses how Xtext supports building IDEs for existing languages and new features of Xtext like hover support and improved build performance.

Language Engineering With Xtext

Sven Efftinge

Strategies for End-to-End Timing Guarantees in a Centralized Software Defined...

RealTime-at-Work (RTaW)

This presentation reports on design choices explored for next-generation zonal E/E architectures supporting mixed criticality traffic with strong timing constraints at the gateways between Ethernet and CAN: • We present methods to validate strategies for packing/unpacking CAN frames to be transmitted over an Ethernet backbone • We present a novel use-case for Time Aware Shaper (TAS), used to confine the traffic from Android applications into short, periodic transmission windows, shielding hence the rest of the traffic from their interference under any evolution scenario. System-level simulations are used to compare TAS with two alternative solutions based on priorities and Credit Based Shaper (CBS) • This study exemplifies how the collaboration between an OEM, a Tier1 and a timing analysis tool vendor built a timing-accurate model of the SDV architecture to explore design alternatives, reduce the time for prototyping and to provide new inputs for the 802.1DG Automotive profile

How To Use AGL CAN Signal

Yuichi Kusakabe

The document discusses how to use Controller Area Network (CAN) signals in Automotive Grade Linux (AGL). It begins with an overview of CAN signals and standard Linux CAN interfaces. It then explains how AGL utilizes existing Linux CAN tools and implements additional services like the low-level CAN service to interface with CAN signals. The document demonstrates setting up CAN hardware and software on an AGL-compatible R-CAR M3 board to send and receive CAN messages. It concludes by discussing future work to support more in-vehicle communication standards in AGL.

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Scoping Tips and Tricks

Java Performance MythBusters

Getting rid of backtracking

Extending the Xbase Typesystem

The Xtext Grammar Language

Recipes to build Code Generators for Non-Xtext Models with Xtend

EMF - Beyond The Basics

EMF Tips n Tricks

Kaniska Mandal

DSLs for Java Developers

Serializing EMF models with Xtext

meysholdt

Graphical Views For Xtext With FXDiagram

Xtend - A Language Made for Java Developers

Jazoon 2010 - Building DSLs with Eclipse

Peter Friese

Graphical Views For Xtext

Enhancing Xtext for General Purpose Languages

University of York

Eclipse DemoCamp in Paris: Language Development with Xtext

From Stairway to Heaven onto the Highway to Hell with Xtext

Xtext, diagrams and ux

What's Cooking in Xtext 2.0