... when code does not evolve with its language,
maintaining backward compatibility means
that a language can be expanded, but nothing can
be removed
... This leads to a language
that is increasingly large and complex and
makes the learning curve steeper and maintenance
more difficult
(Jeffrey Overbey and Ralph Johnson, Regrowing a Language. Onward! 2009.)
Implement a set of refactorings (using Rascal-MPL) to evolve a legacy Java systems towards the usage of more recent constructs of the language.
- Convert Anonymous Inner Classes into Lambda Expressions
- Convert explicit typing of generic r-alues into Diamond Operator
- Conver if-then-else-if on the value of strings to Switch String
- Convert similar catch blocks into MultiCatch
- clone this repository
- install rascal-mpl ide
- import this project to the rascal workspace
- execute the rascal shell using this project as reference
- import the Driver module (such as > import Driver;)
- execute the function refactorProjects passing as argument a location for an input file
The input file is in the CSV format, with at least the following columns:
- project name
- project revision (to help on reproducibility)
- type of tranformation (DI for diamond operator, AC for anonymous to lambda, MC for multi-catch)
- percentage (just a number, with the percentage of transformations with respect to the oportunities) * absolute path to the project
