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Talents:
Dynamically Composable
    Units of Reuse
Jorge Ressia, Tudor Gîrba, Oscar Nierstrasz,
     Fabrizio Perin and Lukas Renggli


            www.scg.unibe.ch
Reuse
Mixins
Talents Presentation at ESUG 2011
Linear Composition
Talents Presentation at ESUG 2011
Single Composition
Talents Presentation at ESUG 2011
Traits
Class = Superclass + State + Traits +
           Glue methods
Flatten Composition
Multiple
Composition
Problem
moosetechnology.org
MooseEntity


                                      FAMIXEntity

                                                ...

                                       FAMIXType
aFAMIXClass
  isTestClass
                          2            FAMIXClass                            Key
                                                                   instance-of
                                  isTestClass
                1                                                  message send
                                                                   lookup

            aFAMIXClass            self inheritsFrom: 'TestCase'
                              3
What about objects?
Talents
MooseEntity


                                                                    FAMIXEntity

                                                                        ...
                                        3
                                            aJeeClassTalent
                                                                    FAMIXType
                                               talent isTestClass


                     aJeeClassTalent                                FAMIXClass
aFAMIXClass
                                                   2
  inheritsFrom: 'TestCase'

                             4
                                 aFAMIXClass                                                Key
                                                                                  instance-of
                                 1                                                message send
                                                                                  lookup
                aFAMIXClass
                                                                                  acquire
                  isTestClass
Operations
Define a method
jeeClassTalent
      defineMethodNamed: #isTestClass
      performing: '^ self inheritsFrom: #TestCase'.
Exclude a method
jeeClassTalent
      excludeMethodNamed: #isTestClass
Replace a method
jeeClassTalent
      replaceMethodNamed: #isTestClass
      performing: '^ self inheritsFrom: #TestCase'.
Composition
 Operators
Composition
aClass := FAMIXClass new.
aClass acquire: ( javaClassTalent , jeeClassTalent ).
Alias
aClass := FAMIXClass new.
aClass acquire: javaClassTalent , ( jeeClassTalent
    @ {#isTestClass -> #isJEETestClass})
Exclusion
aClass := FAMIXClass new.
aClass acquire: javaClassTalent ,
        (jeeClassTalent - #isTestClass).
Implementation
Reflection
scg.unibe.ch/research/
        bifrost
Organize the
 Meta-level
Explicit
Meta-objects
Class
         Talent




Object
Class
         Talent




Object
Class
              Talent




Talented Object
Flattening
Scoping
Talents

scg.unibe.ch/research/talents

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Talents Presentation at ESUG 2011

Hinweis der Redaktion

  1. \n
  2. \n
  3. \n
  4. Since My Rectangle is a composition, I cannot access the behavior in MColor or MBorder exclusively.\nMixins have to be applied one at a time.\n
  5. \n\n
  6. Since My Rectangle is a composition, I cannot access the behavior in MColor or MBorder exclusively.\nMixins have to be applied one at a time.\n
  7. \n
  8. Since My Rectangle is a composition, I cannot access the behavior in MColor or MBorder exclusively.\nMixins have to be applied one at a time.\n
  9. Originally in self\nthen developed by nathanel scharli in smalltalk.\nWith operations\n\n
  10. Self traits do not provide composition operators.\n
  11. Originally in self\nthen developed by nathanel scharli in smalltalk.\nWith operations\n\n
  12. Originally in self\nthen developed by nathanel scharli in smalltalk.\nWith operations\n\n
  13. \n
  14. that it is a cool, large and open source platform for data and software analysis that is being increasingly used in industrial projects\n
  15. Class oriented. Fixed on classes.\nClass explosion. \nGet the example from simon.\n
  16. \n
  17. \n
  18. \n
  19. \n
  20. \n
  21. \n
  22. \n
  23. \n
  24. \n
  25. \n
  26. \n
  27. \n
  28. \n
  29. \n
  30. \n
  31. \n
  32. Another example will be the Simon one.\nTypically for a graph algorithm you have a graph structure which is built from Famix entities, yet nodes and edges require specific behavior and state to preserve algorithmic complexity.\nRight now we do some model transformations, that is we create the graph structure from the Famix model to run the algorithm with, then we can reflect on the graph or inject the result back into the Famix entities if necessary. But we need to create this disposable graph structure anyway.\nI always thought it would be much cooler to add behavior and state for graph computation directly into the Famix entities, run the algorithm, get the results, then remove such state and behavior from entities to preserve space. Especially this last point was not apparent in the Moose JEE example.\n
  33. \n
  34. \n
  35. \n
  36. We see that there are many different ways of doing reflection, adaptation, instrumentation, many are low level.\nAnd the ones that are highly flexible cannot break free from the limitations of the language.\n
  37. Adaptation semantic abstraction for composing meta-level structure and behavior.\n
  38. \n
  39. \n
  40. \n
  41. \n
  42. \n
  43. \n