Automatic Code Generation

1
Automatic Code Generation

• Present by Jiajing Liu
• Team 10

2
Outline

• Introduction to CODE GENERATION
• Forms of Auto-Code Generation
• Click and Code
• Generating Purpose Language
• Code Generation Engine
• Code Generator
• Concerns and Constraints
• Reference
• Q A

3
Introduction

• CODE GENERATION is code that writes code1.
• Automatic Code Generation can
• Maintain consistent code quality and allows your
  code to evolve quickly in response to metadata
  changes
• Extend reuse to include code with similar
  patterns
• Result increased speed, reusability, agility,
  and consistency in your application development

4
Forms of Code Generation

• Click and Code - Visual IDE
• Microsoft Visual Studio .net
• Altova Enterprise XML Suite
• Borland ECO (Enterprise Core Object)
• Generating Purpose Language
• XSL/XSLT
• Code Generation Engine
• Velocity
• MiddleGen

5
Example - Visual IDE

• Microsoft VS.net

6
Example - Visual IDE

• Borland C Builder
• with
• Enterprise Core Object (ECO)

7
Example - XSL/XSLT

• XSL/XSLT(Template) XML (Data) HTML Page
  (Static Code)

8
Example CodeGen Engine

• CustomerDetailAction()
• int i
• web_submit_data("CustomerDetailNavBarAction.do",
• "ActionactionURL/CustomerDetailNavBarAction.do
  ",
• "RefererrefererURL/CustomerNavBar.jsp",
• "NamenavToPage", "ValueCustomerDetail",
  ENDITEM,
• LAST)
• for(i0 iltNO_OF_LIST_ENTRIES i)
• lr_start_transaction("CustomerDetailDetailActi
  on")
• web_submit_data("CustomerDetailDetailAction.do",
  
• "ActionactionURL/CustomerDetailDetailAction.d
  o",
• "RefererrefererURL/CustomerDetailDetail.jsp",
  
• ITEMDATA,
• "NamevalueObject.IdName", "ValueIndia",
  ENDITEM,
• "NamevalueObject.MasterMediaSysId",
  "Value45", ENDITEM,
• "NamevalueObject.TerritoryArray",
  "Valueparameter.Value", ENDITEM,
• "NamevalueObject.MasterMedia", "ValueHome
  Video", ENDITEM,

Velocity Template (left) and Generated Result
(right)

• foreach(action in actions)
• action.NameAction()
• int i
• web_submit_data("wrapperNameDetailNavBarAction
  .do",
• "ActionactionURL/wrapperNameDetailNavBarAct
  ion.do",
• "RefererrefererURL/wrapperNameNavBar.jsp",
• "NamenavToPage", "Valueaction.Name",
  ENDITEM,
• LAST)
• for(i0 iltNO_OF_LIST_ENTRIES i)
• foreach(vObj in action.valueObjects)
• set(vObjName vObj.Name)
• lr_start_transaction("vObjNameDetailAction")
  
• web_submit_data("vObjNameDetailAction.do",
• "ActionactionURL/vObjNameDetailAction.do",
  
• "RefererrefererURL/vObjNameDetail.jsp",
• ITEMDATA,
• foreach(parameter in vObj.Parameters)

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Forms of Code Generation

• Code Generator
• Template independent
• Domain Specific
• Template based
• Code Munger
• Inline Code Expander
• Mixed Code Generator
• Partial Class Generator
• Tier Generator

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Example Code Generator

• CodeSmith
• nHibernate Mapping Files Generation

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Concerns and Constraints

• Code generation is a design smell.
• Engineers will ignore the 'do not edit' comments.
  
• The generator won't be used or maintained.
• My application isn't complex enough for
  generation.
• My application is too complex for generation.

12
Reference

• 1 Code Generation in Microsoft .NET. Kathleen
  Dollard. Apress.
• 2 Generative Programming Methods, Tools, and
  Applications. Krzysztof Czarnecki.
• 3 Click and code automatic code generation.
  Maclay, D. IEE Review. Volume 46, Issue 3, May
  2000.
• 4 Graphical modelling and design with automatic
  code generation. Smith, M. Partitioning in
  Hardware-Software Codesigns, IEE Colloquium on.13
  Feb 1995.
• 5 Automatic code generation for actuator
  interfacing from a declarative specification.
  Jung, E. Kapoor, C. Batory, D. (IROS 2005).
  2005 IEEE/RSJ International Conference on. 2-6
  Aug. 2005
• 6 Tools for the code generation. Johanna
  Ambrosio. Application Development Trends.
  6/30/2003.
• 7 http//www.codegeneration.net/tiki-index.php
• 8 http//www.codesmithtools.com/

13
Thank you

• Question on Auto-Code Generation?