How about asking Sun to support CNI then ? Because it's they who limit your "freedoom of choice", by supporting only one (the technically inferior, AIUI) interface.
Who says that JNI is technically inferior than CNI technically? As a JVM specialist, I can say that it is not clearcut. JNI is by far the most flexible of the two *binary* interfaces, giving much more freedom to the JVM implementer. It is far from easy (if it is at all possible) to get CNI to support things like precise moving garbage collectors (such as copying/compacting collectors), or allowing for non-traditional object layouts (bidirectional, split objects, etc.).
In fact, CNI imposes a deep dependency between a JVM and a CNI library. For example, if a CNI implementation was adapted to support a bidirectional object layout, then a compiled CNI library would only work with JVMs that implement this bidirectional object layout.
JNI, on the other hand, allows a compiled JNI library to work with any JVM, regardless of the internal JVM organization (object layout, GC, etc).
JNI is preperly a "binary interface" between a library and a JVM. CNI, on the pther hand, is a mix of a binary interface, and a C++ level programming interface that requires specific compiler support.
Depending on your needs, you can argue that each of JNI and CNI is technically superior.
As for the initial question of this thread:
> The big question is: should we switch to CNI?
Unless the java-gnome project wants to restrict java-gnome to work with gcj/gij, or wants to provide CNI implementations for other JVMs [;-)] and is willing to provide several binary packages for each platform (one per JVM that supports a different CNI implementation), I recommend that they use the JNI binary interface for their library, for maximum compatibility with Free (and non-free, if they care) JVMs.
Etienne
-- Etienne M. Gagnon, Ph.D. http://www.info.uqam.ca/~egagnon/ SableVM: http://www.sablevm.org/ SableCC: http://www.sablecc.org/
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