Mercurial in pure Java

[Andrey Somov]

> Remy Blank wrote:
>> Theodore Tso wrote:
>>> So I wouldn't be too quick to rule out having a Eclipse plugin,
>>> written in Java, call out to Python-based Mercurial cli.
>> And if the CLI is not good enough, write a GPL-2 plugin for Mercurial
>> that provides an RPC interface to the Mercurial code through
>> stdin/stdout or a socket, and use that interface from your Eclipse plugin.
>>
>> It still requires Python to run, though.
> 
> That's probably the way to go. No licencing issues since all code that 
> is a derivative work of Mercurial is GPLed, and you just need the user 
> to do the 'obvious' thing of installing Mercurial separately, which 
> they'd probably do anyway.
> 
> That's also quite likely to be the most performant approach without a 
> lot of work.
> 
> Tom
> 

I wanted to stay away but I cannot...

Python has heapq module which implements "the priority queue algorithm." 
Why to bother to implement it in Python ? Why not to take it from Java ?
It is simple:

- download and install Java
- install library which implements the priority queue algorithm
- take care that the Java version matches the one required by the library
- write a small Java program for the interface
- launch Java from Python and execute the program
- parse the output taking care that another version of Java or the 
library may change it
- get the result and use in your Python program

Is it the way to go ? (I hope you can see the symmetry with Python and 
Mercurial)

-
Andrey