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From Böhringer Jochen <>
Subject Re: AW: Using Trinidad under Java 1.4?
Date Wed, 09 May 2007 08:27:37 GMT
Hi Arnaud,

My reply comes really late. But perhaps you will still read it. Thanks for the great wiki
page. I have followed your explanations and it works like a charm!

Best regards,

Von: Arnaud Mergey [] 
Gesendet: Mittwoch, 25. April 2007 10:29
Betreff: Re: AW: Using Trinidad under Java 1.4?

Hi Matthias

I have created a page in the wiki, 
I hope it is in the right place 


Matthias Wessendorf wrote: 

this has been asked sometimes before, can you try to add some infos on the wiki ?

On 4/24/07, Arnaud Mergey <> wrote: 

Retroweaver weave the bytecode and replace automatically specific java 1.5 API by backported
API. for ConcurrentHashMap retroweaver replace java.util.concurrent by util.concurrent backport
wich is provided with retroweaver, so if you "retroweave" trinidad you need to put in your
classpath runtime jar of retroweaver backport-util-concurrent.jar and the class provided in
my mail.


Böhringer Jochen wrote: 
Hello Arnaud,

Thanks for this hint!
I am a bit confused because of Adam Winer writing that Trinidad uses some Java5 specific APIs.
I think Retroweaver does not provide these specific APIs (like ConcurrentHashMap).

But you wrote it works for you, so I think you have done a build.
Would you provide me that build?

Best regards
Von: Arnaud Mergey [] 

retroweaver works with trinidad, but you need to put this class in your classpath

Gary VanMatre wrote: 
From: Böhringer Jochen 


I am doing some research for a new project. It is a web application whose user 
interface should be programmed using JSF. The application server we are running 

in the target environment is WebSphere Application Server 5.1. 
Unfortunately the latest JDK supported by this WebSphere version is 1.4.2 :-( 

The installation instructions of Trinidad do note Java 5 as a dependency. 

So is this a showstopper for Trinidad in this project? Perhaps the only 1.5 
features used are generics and these can also be interpreted by a 1.4 jdk on 

I have used Trinidad in other projects and would really like to use it again... 

So my question in one sentence: Is it possible to run Trinidad on a 1.4 JDK with 
small amount of adaptation or should I stop thinking about it immediately? 


Maybe retroweaver would work?

Best regards, 






Arnaud Mergey | Software Developer | 
Oracle Fusion Middleware
300 rn6 69760 Limonest 

Matthias Wessendorf

further stuff:
mail: mwessendorf-at-gmail-dot-com 


Arnaud Mergey | Software Developer | 
Oracle Fusion Middleware
300 rn6 69760 Limonest 

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