See www.eclipse.org/edt for more details.

1. The Inner Workings of EGL: a Solution to the Complexities of Modern Application Development Tim W Wilson STSM & EGL Chief Architect, IBM [email_address]

3. Evolution of Language Abstraction Hardware OS Runtime Platform Assembler C, COBOL Java EGL One One One One One One One Many Many Many One Single Machine Multiple Machine Future One Many Evolution of Execution Environment Evolution of Programming Languages Range of Deployment Options

9. EGL Syntactic Structure All type definitions are in a package Imports of types outside current package Declaration of a program Data and Function declarations Statements and Expressions Extensible IO Statement Function invocation

14. Native Type Example: egl.lang.SysLib Completely abstract API – concrete implementations dependent on target platform

17. EDT – Code compilation process Java EGL Source Code EGL Compiler Model Extensible Code Generation Framework Java JavaScript C/C++ .Net … Pluggable Generators Eclipse JEE Dojo Pluggable Extension Examples Possible Android COBOL CICS/IMS

18. EGL Structure: The EGL Model

19. EGL Model So – how are all these classes defined?

21. The MOF (Meta Object Framework) Model

25. XML Serialization of EClass - StructPart This object is an instance of org.eclipse.edt.mof.EClass Instances of org.eclipse.edt.mof.egl.Field

26. XML Serialization of ExternalType - Customer This object is an instance of org.eclipse.edt.mof.egl.ExternalType Instances of org.eclipse.edt.mof.egl.Field

28. Module Structure of EDT: org.eclipse.edt org.eclipse.edt.ide org.eclipse.edt.core org.eclipse.edt.gen

33. Mapping File of EDT Core Java Generator EGL Model type signature=Template java class type signature

38. Android Generator: an example

40. UI Programming Model Example: Define Native Types in EGL Abstract concepts defined using Externaltype with AbstractType stereotype Event handlers modeled as Delegates Inheritance modeled directly Externaltype declarations allow for full Class modeling

41. UI Programming Model Example: Define Concepts in EGL Core UI Concepts Stereotypes for implementation Concrete Widgets

43. Example Usage: Mortgage Calculator Event handler declaration Stereotype used to implement a Window Similar conceptually to RUIHandler Invocation of the Amortize Service Declaration of Widgets and properties

45. Mapping File of EDT Core Java Generator EGL Model type signature=Template java class type signature

46. Map Android Model to Android Templates Mapping of model classes to their templates Overrides of EGL Core Java Templates

47. Create Necessary Templates Override existing method from Template from Base Java Generator Template method invocation

48. Android Mortgage Calculator Example

49. Android Mortgage Calculator Detail Native type abstract API access

50. Mapping Native Types to Runtime Types EGL native type type signature = Runtime java class type signature

52. Create the AndroidGenerator Command Line Tool Android generator extends core Java generator Adds command line parameters as necessary Define where the configuration is for adding and overriding code generation templates Define where the configuration is for mapping native types to concrete classes in the runtime

56. Thank You