JExtract is an Eclipse plug-in that analyses the source code of a method and recommends extract method refactoring opportunities.
|JExtract 1.1.0 (latest)||Binary||Source Code|
Although Extract Method is a key refactoring for improving program comprehension, refactoring tools for such purpose are often underused. To address this shortcoming, we present JExtract, a recommendation system based on structural similarity that identifies Extract Method refactoring opportunities that are directly automated by IDE-based refactoring tools. Our evaluation suggests that JExtract is far more effective (w.r.t. recall and precision) to identify misplaced code in methods than JDeodorant, a state-of-the-art tool.
The source code of the systems used in the evaluation and their corresponding Extract Method instances file (oracle.txt) are available here as Eclipse projects.
The oracle.txt files contain one Extract Method description per line, for example:
classes.CustomerAction public java.lang.String find() throws java.lang.Exception e2359:577;e2981:41;
In this example, the qualified class name is
classes.CustomerAction, the method signature is
public java.lang.String find() throws java.lang.Exception and the extracted statements are those enclosed by the char ranges
e2359:577;e2981:41;. Char ranges are specified as