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[aprssig] Java Class

Dick Repasky dick.repasky at gmail.com
Wed Dec 9 15:11:14 UTC 2009


Hi Matti,

I tried checking out java-aprs-fap with the command

  svn checkout http://repo.ham.fi/websvn/java-aprs-fap/trunk java-aprs-fap

And, I received the error

  svn: XML data was not well-formed

Is that a problem on  my end or on the server?  I'm running svn version
1.5.1 (r32289) on an Ubuntu 8.04 (hardy) system.

Thanks,

Dick, KC9JLU

Matti Aarnio wrote:
> On Sat, Oct 31, 2009 at 01:18:46PM -0500, Gregg Wonderly wrote:
>> Matti Aarnio wrote:
>>> On Fri, Oct 30, 2009 at 11:16:42AM -0700, Bill V WA7NWP wrote:
>>>>>> Has anyone written an open source Java package that will parse APRS
>>>>>> aprs similar to the Ham::APRS::FAP parser for perl?
>>>> http://sourceforge.net/projects/jeaprs/
>>>> google on "sourceforge aprs java"
>>> Moved to  https://jeaprs.dev.java.net/
> 
> Much of my perhaps not entirely wrong email removed..
> ... 
>> Perhaps my posts are not all making it to the list?
> 
> Maybe they are, I noticed your original reply much latter when browsing my inbox.
> 
>>    There are in
>> fact two things in this project.  The library level parsing and
>> construction of APRS packets (and there is opentrac in there too),
>> and the larger bit of code that was my initial work on a "modular"
>> application system.
>>
>> The javax.comm business is a funny thing.  I have support for
>> javax.comm.  You just have to get the implementation for the
>> platform that you want to run code on.
>>
>> The RxTx project is the current main stream provider of implementations of this API.
> 
> Yep.  So much for the "universally available platform support"..
> The RxTx may work on many things, but it is not included as standard
> system component on all systems, so you have to include it yourself in
> application packaging, and it becomes a rather hairy proposition rather
> quickly...  Somewhen along Java7 or 8 it may become standard system
> package, such as happened to several Apache Java projects in XML application
> space ... at least on Sun Java;  no idea of what IBM or Microsoft JVMs/JDKs
> have these days for XML processing.  (How many vendors there are delivering Java
> runtimes?  Some interace things are standardized, but there are still some
> ways to make interestingly different platforms  ->  JNI for Sun runtime might
> not work on IBM runtime for same Linux platform, for example.)
> 
> Sometimes a well-written ANSI-C (C++, whatnot) program is simpler to
> make running and be used on different systems, than when one has to
> play with the Java Native Interface on different vendor's java JVM..
> 
> Sometimes that "compile once, run everywhere" goal of Java works, other
> times it fails miserably.  But it is decent for things like javAPRSSrvr
> and APRSIS network connected GUI applications.  For anything else it is
> varyingly challenging.
> 
> But this is getting far from aprssig topic.
> 
> I begun to write Java APRS FAP library:
> 
>   http://repo.ham.fi/websvn/java-aprs-fap/
> 
> At least initially it will be limited on parsing (not producing) APRS frames,
> and its interface API will resemble that of Perl Ham::APRS::FAP, but it will
> be more towards Java way of making things.
> 
> 
>> Gregg Wonderly
> 
> 73 de Matti, OH2MQK
> 
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