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Example migration of Android application from Java to Kotlin - DO NOT MERGE #9

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@dbacinski dbacinski commented Nov 3, 2017

Migration findings and solved issues:

  • Java protected (package-private + inheritance) != Koltin protected (private + inheritance)
  • there is no package-private scope to hide classes inside of package and expose just a public interface
  • tests that verifies nulls are replaced with non-nullable Kotlin types
  • nullable view has to be guarded with .?, because smart cast does't work for var-s
  • builders can be replaced with constructor and named parameters
  • Mockito is failing on final classes (Kotlin default), can be fixed by Mock Maker
  • Mockito any() doesn't work for objects in Kotlin, alternative any() from mockito-kotlin can be used
  • when is a keyword in Kotlin, use BDDMockito.given() instead
  • Gradle annotationProcessor is replaced by kapt

Check Files changed tab to see files diff.

- Java protected (package-private + inheritance) != Koltin protected (private + inheritance)
- there is no package private scope to hide classes inside of package and expose just a public interface
- removed logic and tests that verifies nulls
- nullable view has to be guarded with .?, because smart cast does't work for var-s
- builders replaced with data classes
- Mockito fails on closed classes, fixed by Mock Maker
- Mockito any() doesn't work in Kotlin, used alternative from mockito-kotlin
- when is a keyword in Kotlin
- replaced annotationProcessor with kapt
@dbacinski dbacinski self-assigned this Nov 3, 2017
@dbacinski dbacinski changed the title DO NOT MERGE - Migration from Java to Kotlin DO NOT MERGE - Example migration from Java to Kotlin Nov 3, 2017
@dbacinski dbacinski changed the title DO NOT MERGE - Example migration from Java to Kotlin Example migration from Java to Kotlin - DO NOT MERGE Nov 3, 2017
@dbacinski dbacinski changed the title Example migration from Java to Kotlin - DO NOT MERGE Example migration of Android application from Java to Kotlin - DO NOT MERGE Nov 8, 2017
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