Javassist | A Reectionbased Programming Wizard for Java Abstract ...

Source: www.csg.is.titech.ac.jp
Topic: Java Programming

Short Desciption:
wizard for assisting Java programming. It automates. class denitions if they are mechanically derived from. other classes. For example since Java does not ...

 

Content Inside:
Javassist | A Reectionbased Programming Wizard for Java Abstract 1 Introduction 2 JavassistPage 1Javassist | A Reectionbased Programming Wizard for JavaShigeru ChibaInstitute of Information Science and ElectronicsUniversity of Tsukubaand Japan Science and Technology Corporationemail:chiba@is.tsukuba.ac.jp http:www.is.tsukuba.ac.jpchibaAbstractThis paper presents the Javassist system which is aprogramming tool for assisting Java programmers. Itenables programmers to write a metalevel programautomatingsome kinds of class denitions. Moreovera number of applications of runtime reection can beimplemented with this system.1 IntroductionA wizard is one of key features of today's applicationsoftware. Itassists users invariousmeansso thattheirwork with that software is productive. For exampleMicrosoft Word provides the letter wizard which inquires some simple questions and automates commonletter elements such as formatting. Also a numberof major software development tools such as VisualC++ and Visual Cafe provide programmingwizardswhichhelpprogrammersedit source code anduse classlibraries.Thispaper presentsJavassistwhichisanewkindofwizard for assisting Java programming. It automatesclass denitions if they are mechanically derived fromother classes.For example since Java does not provide a mechanism for parameterized types in other words a template mechanism programmers who want to use avector holding references only toStringobjects areforced touse type casts whenever anelementisfetchedfrom that vector:String s= String aVectorOfString.elementAt 3 ;Otherwise the programmershavetodene anew classfor a vector ofString:public class StringVectorextends java.util.Vectorpublic void addElement String s super.addElement s ;public String at int i return String elementAt i ;Javassist automaticallydenesStringVectorinsteadof the programmers if the element type String isspecied by a simple annotation.Javassist does not only handle predened assistancebut also allows programmers to dene ...

 

 

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