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Quantitative Analysis of Model Transformations

Quantitative Analysis of Model Transformations. Phu H. Nguyen (h.p.nguyen@student.tue.nl) Supervisor: Prof. Dr. Mark van den Brand Tutor: Ir. Marcel van Amstel. Agenda. Introduction Project goal Xtend Model Transformations Metrics for Xtend Xtend Extractor Tools A case study

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Quantitative Analysis of Model Transformations

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  1. Quantitative Analysis ofModel Transformations Phu H. Nguyen (h.p.nguyen@student.tue.nl) Supervisor: Prof. Dr. Mark van den Brand Tutor: Ir. Marcel van Amstel

  2. Agenda • Introduction • Project goal • Xtend Model Transformations • Metrics for Xtend • Xtend Extractor Tools • A case study • QVTo Model Transformations • Metrics for QVTo • QVTo Extractor Tools • A case study • Conclusions / Department of Mathematics and Computer Science

  3. Introduction • Model Driven Software Development (MDSD): • High level design models at the heart of the development process • Software development automation • Benefits : Productivity, agility, reliability • MDE world: • Domain-specific languages (DSL) • Model-to-model transformations (M2M) • Model-to-text transformations (M2T) / Department of Mathematics and Computer Science 14-11-2010 PAGE 2

  4. How MDSD works / Department of Mathematics and Computer Science

  5. Model-to-model transformations ATL - the Atlas Transformation Language QVT (Operational) - An implementation of OMG’s spec. Xtend - openArchitechtureWare (oAW) ’s transformation language (also used for other tasks within oAW) Epsilon, Kermeta, Stratego, etc. / Department of Mathematics and Computer Science 14-11-2010 PAGE 4

  6. Model transformations • The heart and soul of MDSD • A methodology for developing model transformations with high quality? • Approach: assessing the internal quality of model transformations • Quality assessment of model transformations: • ASF+SDF: enabled • ATL: enabled • QVT: ? • Xtend: ? • Epsilon , Kermeta, Stratego: ? / Department of Mathematics and Computer Science 14-11-2010 PAGE 5

  7. Project goal Enable quality assessment for model transformations by means of metrics. Enable coverage analysis. Enable dependency analysis. Focus on Xtend, QVT-Operational. / Department of Mathematics and Computer Science 14-11-2010 PAGE 6

  8. Sub-goals A metrics suite for measuring Xtend model transformations. A metrics suite for measuring QVTo model transformations. Tools that enables automatic extraction of Xtend metrics, coverage and dependency data. Similar tools for QVTo. Perform case studies to validate the results. / Department of Mathematics and Computer Science 14-11-2010 PAGE 7

  9. oAW & Xtend model transformations • openArchitectureWare (oAW) • An integrated, one-stop toolkit for MDSD • model-to-model transformations (Xtend) • model-to-text-transformations (Xpand) • text-to-model (Xtext) • Migration to Eclipse: • Xpand, Xtend and Check → Model-to-Text Transformation • Xtext→ Textual Modeling Framework • oAW workflow engine → Modeling Workflow Engine (MWE) / Department of Mathematics and Computer Science

  10. An overview of oAW / Department of Mathematics and Computer Science

  11. Xtend • The transformation language used throughout oAW: • Constraint checks • Model transformations • Generators

  12. Xtend model transformations… … are defined in extension files (*.ext): • Import statements • Import name spaces (meta-models) • Import (reexport) built-in libraries or another extend files • Extensions (transformation functions) / Department of Mathematics and Computer Science 14-11-2010 PAGE 11

  13. Book → Publication • Rules to transform a Book model to a Publication model: • Each Book instance → a Publication instance • The title of a Book → the title of a Publication • The total number of pages of a Publication is the sum of the pages of the Chapters of a Book. / Department of Mathematics and Computer Science 14-11-2010 PAGE 12

  14. Book → Publication: Extension File / Department of Mathematics and Computer Science 14-11-2010 PAGE 13

  15. Quality Attributes Understandability Modifiability Reusability Modularity Completeness Consistency Conciseness Performance / Department of Mathematics and Computer Science 14-11-2010 PAGE 14

  16. Metrics for Xtend model transformations • Categories: • Extension metrics • Dependency metrics • Miscellaneous metrics • Two types of metric: • Simple metric: single value • Aggregate metric: min, max, avg, med, std dev • Total 97 metrics / Department of Mathematics and Computer Science 14-11-2010 PAGE 15

  17. Some examples of Xtend metrics / Department of Mathematics and Computer Science 14-11-2010 PAGE 16

  18. Tools • Design requirements • Input: Extension files • Output: Metrics, Coverage and Dependency data • Extensibility: • New metrics can be defined easily • The calculation of a new metric can be implemented quickly.

  19. Xtend - data models

  20. Xtend Extractor Tools • Java-based Xtend Extractor Tool (JXET) • Elements of the Xtend AST → data model (in-memory Java Objects) • Implemented in Java • XML-based Xtend Extractor Tool (XXET) • Elements of the Xtend AST → XML file • Using Xpath, Xquery

  21. Architecture of JXET • Data model = Java Objects

  22. JXET: Metrics Extractor

  23. Example – Sync2Async / Department of Mathematics and Computer Science

  24. Sync2Async - Simple Metrics

  25. Sync2Async - Aggregate Metrics (1)

  26. Sync2Async - Aggregate Metrics (2) / Department of Mathematics and Computer Science

  27. Dependencies extractor

  28. Sync2Async– Dependencies Graph / Department of Mathematics and Computer Science

  29. Architecture of XXET / Department of Mathematics and Computer Science 14-11-2010 PAGE 28

  30. XXET / Department of Mathematics and Computer Science 14-11-2010 PAGE 29

  31. XXET / Department of Mathematics and Computer Science

  32. XXET / Department of Mathematics and Computer Science

  33. XXET / Department of Mathematics and Computer Science

  34. Query, View, Transformation (QVT) • The declarative parts: • Relations • Core • Imperative implementations: • Operational Mappings • Black-box MOF Operation / Department of Mathematics and Computer Science 14-11-2010 PAGE 33

  35. QVT Implementations • QVT-Operational (QVTo) • SmartQVT • Eclipse M2M Operational QVT (QVTo is the best supported variant in terms of tools) / Department of Mathematics and Computer Science 14-11-2010 PAGE 34

  36. QVTo structure Transformation declaration Imperative operations (mappings, helpers, queries, constructors) Intermediate data Object creation and update mechanism Trace resolution expressions ImperativeOCL - extension to OCL expressions and type system Standard Library / Department of Mathematics and Computer Science 14-11-2010 PAGE 35

  37. Book → Publication: QVTo / Department of Mathematics and Computer Science 14-11-2010 PAGE 36

  38. Metrics for QVTo model transformations • Categories: • Mapping metrics • Helper /Query metrics • Dependency metrics • Miscellaneous metrics • Two types of metric: • Simple metric: value • Aggregate metric: min, max, avg, med, std dev • Total 98 metrics / Department of Mathematics and Computer Science 14-11-2010 PAGE 37

  39. Some examples of QVTo metrics / Department of Mathematics and Computer Science 14-11-2010 PAGE 38

  40. QVTo – Data models / Department of Mathematics and Computer Science 14-11-2010 PAGE 39

  41. Model-based QVTo Extractor Tool (MQET)

  42. Metrics M2M Extractor (QVTo)

  43. QVTo2Metrics Extractor / Department of Mathematics and Computer Science 14-11-2010 PAGE 42

  44. QVTo2Metrics.qvto / Department of Mathematics and Computer Science

  45. QVTo2Metrics.metrics / Department of Mathematics and Computer Science

  46. Metrics M2T Extractor (Xpand)

  47. Single metrics extracted / Department of Mathematics and Computer Science

  48. Aggregatemetrics extracted (1) / Department of Mathematics and Computer Science

  49. Aggregatemetrics extracted (2) / Department of Mathematics and Computer Science

  50. Coverage Extractor / Department of Mathematics and Computer Science

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