I2JAV11 — Package name issue

This is an issue for the Java RTF. Related issue in Core RTF is Issue
5327.

Originally from Michi Henning:

suppose the following [pseudo-]idl:

#pragma prefix "2abc.def"

module xyz {
interface q

;
};

It would generate a Java class 'q' within package 'def.2abc.xyz'.
The package name '2abc' is not that popular with the java compiler
since it starts with a digit.

Discussion from Jishnu Mukerji:

It seems to me that this is more of a language mapping issue. I don't
think that the Repository Ids have any requirement to be of the same
shape as a valid IDL identifier. It would be kind of hard to have GUIDs
as RepId if that were the case.

But even for IDL type RepIds 12345.com seems to be a perfectly good
domain name as is 2ab.com. I don't see why these perfectly valid
domain names should be disallowed because the Java language mapping
is unable to deal with them.

Further discussion from Michi Henning:

One way to fix it would be to state that:

1) For the Java mapping, any prefix that starts with a digit gets
translated with an underscore prefix, so 2ab would turn into
_2ab for the Java mapping.

2) Characters that can appear in a prefix pragma are limited to
some set we'd have to agree on. (Probably the same as for IDL
identifiers, plus '.' and possibly hyphen ('-').)

Further discussion from Jishnu Mukerji:

Item 1 in Michi's list needs to be handled by the IDL-Java RTF. This
message to issues@omg.org is requesting the creation of an issue
covering this item for the Java RTF.

Item 2 can be taken care of in the resolution for Core Issue 5327.

close no change