Re: [equinox-dev] Question

[Olivier Gruber <ogruber@xxxxxxxxxx>]

Thomas,

The premise being class spaces is that
we need to control where a package
is coming from, that is, what bundle
is providing it. We are also saying the imports/exports
are not enough:

• they allow only one version to be elected
• they support only specification versions
• they don't control the origin of the package

So if we were to introduce a concept
of implementation-version, that is, the Eclipse
versions. Furthermore, we would allow
the system to match implementation versions
following the Eclipse matching rules,
allowing therefore to have multiple exported versions 
to match different imported ones. Then,
we can do without the class spaces, if an
implementation version of a package
fully determines the contents of that package.

Hence my question. Assuming that implementation
package would have an implementation
version, would it fully qualify the
contents?

Best regards, 

Olivier Gruber, Ph.D.
Persistent & Distributed Object Platforms and Frameworks
IBM TJ Watson Research Center

Thomas Watson/Austin/IBM@IBMUS Sent by: equinox-dev-admin@xxxxxxxxxxx 03/30/2004 09:21 AM Please respond to equinox-dev

To:        equinox-dev@xxxxxxxxxxx         cc:                 Subject:        Re: [equinox-dev] Question

When you use the term "providing" it is implying the use of a
NAMED class space.  A Bundle provides a set of packages to a NAMED
class space which is named and versioned by the Bundle-SymbolicName and
the Bundle-Version.  In this case the packages are not versioned.
 Rather the set of packages the bundle is "providing" is
named and versioned. 

We do allow two bundles to provide the same package two their own NAMED
class space but these two NAMED class spaces must not have the same symbolic
name and same bundle version. 

Thomas Watson

Olivier Gruber/Watson/IBM@IBMUS Sent by: equinox-dev-admin@xxxxxxxxxxx 03/30/2004 07:19 AM Please respond to equinox-dev

To:        equinox-dev@xxxxxxxxxxx, equinox-dev-admin@xxxxxxxxxxx        cc:                Subject:        [equinox-dev] Question

Can two bundles providing the same package name, same version,
provide different contents? 

I would hope not. 

If not, is there any other reason why the origin of a package might matter?

Best regards, 

Olivier Gruber, Ph.D.
Persistent & Distributed Object Platforms and Frameworks
IBM TJ Watson Research Center