Difference between revisions of "Projects/Summer of Code/2007/Projects/KrossJava"

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(Goals)
(Known problems)
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===Known problems===
 
===Known problems===
* http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6493522
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* Java Bug [http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6493522 # 6493522]
* http://forum.java.sun.com/thread.jspa?threadID=595559&messageID=3146104
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* [http://forum.java.sun.com/thread.jspa?threadID=595559&messageID=3146104 libjvm.so: cannot open shared object file: No such file or directory]
 
* since Java is more static then Python or Ruby, it's a tricky task to handle it in a dynamic way.
 
* since Java is more static then Python or Ruby, it's a tricky task to handle it in a dynamic way.
 
* rm -f CMakeCache.txt may help :)
 
* rm -f CMakeCache.txt may help :)
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* [http://java.sun.com/j2se/1.3/docs/guide/reflection/proxy.html Dynamic Proxies] are not flexible enough. See [http://websvn.kde.org/?view=rev&revision=685415 r685415].

Revision as of 19:01, 9 July 2007

Java backend for Kross

Contents

Intro

Abstract

Kross is a scripting framework that allows a program to easily integrate support for multiple scripting languages. Currently Python, Ruby and KJS are supported.

This project aims to integrate Java as another supported scripting language. Java is among the most used programming languages according to various sources, so supporting Java in Kross opens a lot of potential for programs using Kross as a scripting backend. This affects among others popular applications as KOffice, KWord, KSpread, Krita, Kexi and SuperKaramba.

Project

Create a Java backend for Kross. This will involve creating new code to the model of the existing modules for KJS, Python and Ruby. The code will have as much as possible (ideally full) documentation and unit test coverage.

Benefits

Every application using Kross will transparently receive dynamic Java scripting support. Since Java is one of the major programming languages these days, it would allow lots of developers to start scripting with a familiar language.

Java comes with an extensive library of classes, which will then also be available to the program. Database access (JDBC), web server (Tomcat), RMI and networking, ... all become easily accessible for a wide variety of programs.

Status

Developing happens in the KDE SVN. Basic things are starting to work while there stays still a lot of work.

Goals

Developing happens according to eXtreme Programming and the following list provides a basic list of some selected goals.

  • [DONE] Get some basic code done, that links against the jvm.
  • [DONE] Be able to run "kross Test.class" that does actualy execute some java code.
  • [DONE] Integrate a custom classloader and put it into a kross.jar
  • [DONE] Get a simple sample done to connect native methods from a QObject to a Java method.
  • [DONE] Introduce Extension to wrap QObject's and add InvocationHandler to generalize calls.
  • [TODO] Java<=>Qt variables
  • [TODO] Get that code generic to handle any kind of QObject. That point includes for sure multiple sub-points :)
  • [TODO] Compile to bytecode on demand.

Known problems


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