[cross-project-issues-dev] Re: EMF usage in TPTP 4.4.0

[Marcelo Paternostro <marcelop@xxxxxxxxxx>]

I believe I am reading some misleading information on this thread.  Just to
make sure we are all on the same page, I will try to summarize the
technical details that I think are relevant here.

- A code compiled with Java 1.4 runs on Java 5 without any problem.

- A code compiled with Java 5 does not run with Java 1.4.  Even
'HelloWorld.java' has such "limitation".

- A bundle that has its environment set to require Java 5 is not activated
when Eclipse is executed with Java 1.4.

- EMF 2.3.0 is compiled with Java 5 and all its bundles require Java 5.

- EMF 2.3.0 cannot be compiled with Java 1.4 due to the extensive use of
Java 5.0 features.

- EMF 2.3.0 is binary compatible with our latest release (EMF 2.2.1).
Besides our own tests, we heard this from developers of Eclipse projects
and commercial products.  This means that adopting EMF 2.3.0 is not a
problem as long as the code is not recompiled.  We also verified that  EMF
2.3.0 does not break anything if the source compatibility of projects are
set to Java 1.4,

- EMF 2.3.0 can generate code targeting both Java 1.4 and Java 5.


Putting it together:

- EMF 2.3.0 and its dependencies are not available if Java 1.4 is used.

- If a bundle is compiled with Java 1.4 or with source compatibility set to
Java 1.4, it will run without any problems with EMF 2.3.0 and Java 5.

- To run your code with Java 1.4, you will need a previous version of EMF.
Our latest release is 2.2.1 (available in Callisto) and we are currently
fixing important bugs on the 2.2.2 maintenance stream.


Hopefully this will make it easier to understand the impacts of EMF 2.3.0
on Europa.

Best regards,

Marcelo Paternostro
IBM Toronto Lab
marcelop@xxxxxxxxxx