AST Diff Gallery

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Nikolaos Tsantalis edited this page Jan 20, 2023 · 45 revisions

Here you can find some case studies demonstrating the advanced diff capabilities of RefactoringMiner.

Extract Method

Nested Extract Method refactorings in commit [Click to view Diff]
Nested Extract Method refactorings in commit [Click to view Diff]
Nested Extract Method refactorings in commit [Click to view Diff]
Extract Method refactorings + control flow restructuring in commit [Click to view Diff]
Extract Method refactorings + Move Method refactorings in commit [Click to view Diff]

Multi-Mappings (many to one)

Nested Extract Method refactorings with duplicated code in commit [Click to view Diff]
12 duplicated code fragments extracted from the same method in commit [Click to view Diff]
Merged and extracted statements out of if-else-if in commit [Click to view Diff]
Merged variable declaration statements out of if-else-if in commit [Click to view Diff]
Merged if-else-if conditionals in commit [Click to view Diff]
Merged catch blocks in commit [Click to view Diff]
36 duplicated code fragments extracted from the same method in commit [Click to view Diff]

Multi-Mappings (one to many)

Try-finally block duplicated between original and extracted method in commit [Click to view Diff]
Statement split and moved in if-else-if in commit [Click to view Diff]
Nested Inline Method refactoring with two call sites in commit [Click to view Diff]

Semantic diff

Replace Loop with Stream API pipeline in commit [Click to view Diff]

Overlapping refactorings

Inline Method with overlapping Rename Method and 2x Extract Variable refactorings in commit [Click to view Diff]