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]
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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
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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
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14. Native Type Example: egl.lang.SysLib Completely abstract API – concrete implementations dependent on target platform
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
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28. Module Structure of EDT: org.eclipse.edt org.eclipse.edt.ide org.eclipse.edt.core org.eclipse.edt.gen
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33. Mapping File of EDT Core Java Generator EGL Model type signature=Template java class type signature
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
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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
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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
50. Mapping Native Types to Runtime Types EGL native type type signature = Runtime java class type signature
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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
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