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PHD-CS-L  April 2017

PHD-CS-L April 2017

Subject:

[SWE Seminar] 5/1 1:00pm, Raffi Khatchadourian, Automated Refactoring of Legacy Java Software to Default Methods

From:

Jonathan Bell <[log in to unmask]>

Reply-To:

Jonathan Bell <[log in to unmask]>

Date:

Tue, 25 Apr 2017 14:45:58 +0000

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Please see the announcement below for a talk coming up on 5/1 at 1:00pm in room 3507.

Title: Automated Refactoring of Legacy Java Software to Default Methods

Location: 3507 ENGR

Abstract: Java 8 default methods, which allow interfaces to contain (instance) method implementations, are useful for the skeletal implementation software design pattern. However, it is not easy to transform existing software to exploit default methods as it requires analyzing complex type hierarchies, resolving multiple implementation inheritance issues, reconciling differences between class and interface methods, and analyzing tie-breakers (dispatch precedence) with overriding class methods to preserve type-correctness and confirm semantics preservation. In this talk, I discuss an efficient, fully-automated, type constraint-based refactoring approach that assists developers in taking advantage of enhanced interfaces for their legacy Java software. The approach features an extensive rule set that covers various corner-cases where default methods cannot be used. To demonstrate applicability, the approach has been implemented as an Eclipse plug-in and applied to 19 real-world Java projects. Pull requests were also submitted to popular GitHub repositories. The indication is that it is useful in migrating skeletal implementation methods to interfaces as default methods, sheds light onto the pattern’s usage, and provides insight to language designers on how this new construct applies to existing software.

Bio: Raffi Khatchadourian is an Assistant Professor in the Computer Science Department at Hunter College and the Graduate Center of the City University of New York (CUNY). He received his MS and Ph.D. degrees in Computer Science from Ohio State University and BS degree in Computer Science from Monmouth University in New Jersey. Prior to joining CUNY, he was a Software Engineer at Apple, Inc. in Cupertino, California, where he worked on Digital Rights Management (DRM) for iTunes, iBooks, and the App store. He also developed distributed software that tested various features of iPhones, iPads, and iPods. Raffi's research focus is techniques for automated software evolution, particularly those related to automated refactoring and source code recommendation systems with the goal of easing the burden associated with correctly and efficiently evolving large and complex software.

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