Hi all,
Let me outline an example:
named module GeneralInvoker, exports com.foo.gi.
package com.foo.gi;
public class TheInvoker{
public static Object invoke(Object receiver, String name, Object..
args) {
Method m = receiver.getClass().getDeclaredMethod(name, toClass(args));
return m.invoke(args);
}
.....
}
named module MyOtherLib, requires GeneralInvoker, no exports
package my.lib;
public class SomeClassOfTheLibrary {
public void invokeBarOnArgument(Object x) {
TheInvoker.invoke(x, "bar");
}
....
}
(obviously this is just an outline, not real classes)
So if I see this right, then calling TheInvoker.invoke will fail,
because my.lib.SomeClassOfTheLibrary is not accessible by
com.foo.gi.TheInvoker. And am I right in that if MyOtherLib adds a
"export my.lib to GeneralInvoker", this will then work?
Now some advanced questions ;)
assuming MyOtherLib also requires YetAnotherLib and has the exports-to
in the module descriptor... does it automatically imply readability For
GeneralInvoker on YetAnotherLib (only exported parts of course)?
Assuming this is not the case... can I use Module#addReads, with the
caller being from GeneralInvoker and the other Module being
YetAnotherLib, to create that readability?
And even more difficult:
Assuming TheInvoker spawns a new class loader and a class within that to
do the actual method invocation. So far I assume the module of that
class would the unnamed module. As such I have access to the exports of
MyOtherLib and YetAnotherLib.
But how do I establish that class to be able to access
my.lib.SomeClassOfTheLibrary?
I would have assumed Layers can do it, but I don't see how the API gives
me that. Having another exports-to in the module descriptor of
MyOtherLib will I think not work, since even if I define a naming
convention, this module does not exist at compile time.
Or should I trick Java by creating a dummy module with a certain name,
that MyOtherLib can export-to, but is used at compile time only?
Here I might be able to use Layer to define my module... unless the JVM
expects that module to exists7find when it loads MyOtherLib, in which
case I am stuck again.
So what am I missing or is this final part really not possible?
bye Jochen
