臺灣博碩士論文加值系統

移除例外處理壞味道，可以提升軟體的強健度。然而，例外處理壞味道的移除，是相當具有挑戰性的工作，對於經驗不足的開發人員尤然。
針對各種不同的JAVA 程式例外處理壞味道，本論文提供一系列以重構為基礎的處理壞味道移除參考範例，以導引開發者移除例外處理壞味道。我們並將相關作業程序實作在Robusta工具中，開發人員可透過Robusta工具自動化重構程式碼來消除壞味道，以提升軟體的強健度。

Exception handling bad smells may jeopardize the robustness of a program. While writing exception handling code without bad smells is challenging, the task of removing exception handling bad smells is even harder. This is particularly true for inexperienced developers.
Robusta is a static analysis tool capable of detecting exception handling bad smells in Java programs and exposing their impact to the program. As an extension of the previous work on Robusta, in this thesis we propose a serious of refactoring-based smell removal methods corresponding to the exception handling bad smells detectable by the Robusta. The refactoring methods have been implemented in Robusta. Its usefulness has also been shown in an empirical study.

摘　要 i
ABSTRACT ii
致謝 iii
目錄 iv
表目錄 vii
圖目錄 viii
第一章 緒論 1
1.1 研究背景與動機 1
1.2 研究目標 1
1.3 論文組織架構 2
第二章 背景知識 3
2.1 Robusta 3
2.2例外處理壞味道 3
2.2.1 Empty Catch Block 3
2.2.2 Dummy Handler 4
2.2.3 Unprotected Main Program 5
2.2.4 Nested Try Statement 6
2.2.5 Careless Cleanup 6
2.2.6 Exception Thrown From Finally Block 7
2.3強健度等級 8
等級0：未定義(Undefined) 8
等級1：錯誤回報(Error reporting) 8
等級2：狀態回復(State recovery) 9
等級3：行為重試(Behavior recovery) 10
2.4 Abstract Syntax Tree 11
第三章 研究方法 13
3.1 壞味道消除方法介紹 13
3.1.1 Dummy Handler & Empty Catch Block 13
3.1.2 Unprotected Main Program 17
3.1.3 Nested Try Statement 19
3.1.4 Careless Cleanup 22
3.1.5 Exception Thrown From Finally Block 23
3.2 過去與現在Robusta快速修復與重構差異 26
3.2.1 快速修復 26
3.2.2 重構 27
3.3 設計與實作 28
3.3.1 快速修復 28
3.3.2 重構 37
3.4 壞味道的偵測、曝露及消除流程 44
第四章 應用實例 45
4.1 Dummy Handler應用實例 45
4.1.1偵測Dummy Handler 45
4.1.2產生曝露Dummy Handler的測試案例 46
4.1.3消除Dummy Handler 47
4.2 Careless Cleanup應用實例 49
4.2.1偵測Careless Cleanup 49
4.2.2產生曝露Careless Cleanup的測試案例 49
4.2.3消除Careless Cleanup 50
4.3 Exception Thrown From Finally Block應用實例 52
4.3.1偵測Exception Thrown From Finally Block 52
4.3.2產生曝露Exception Thrown From Finally Block的測試案例 52
4.3.3消除Exception Thrown From Finally Block 53
4.4 Unprotected Main Program應用實例 56
4.4.1 偵測Unprotected Main Program 56
4.4.2產生曝露Unprotected Main Program的測試案例 56
4.4.3消除Unprotected Main Program 57
第五章 結論與未來展望 59
5.1 結論 59
5.2 未來展望 59
參考文獻 61

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[17]Eclipse IMarker document,
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