Re: [jdt-dev] Import issues with generics and inner interfaces

[Daniel Megert <daniel_megert@xxxxxxxxxx>]

Are you using the same Java compliance level for Eclipse and javac? Note
that such questions should be asked on the eclipse.tools.jdt newsgroup or
filed as bug if you think Eclipse is doing it wrong.

Dani

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  |martin.nilsson@xxxxxxxxxxx                                                                                                                        |
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  |jdt-dev@xxxxxxxxxxx                                                                                                                               |
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  |30.10.2009 10:29                                                                                                                                  |
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  |[jdt-dev] Import issues with generics and inner interfaces                                                                                        |
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Hello

I'm running into a problem with an API that I'm developing that deals with
generics and inner interfaces. A very simple example of the problem is the
following:

SuperInterface.java:

package com.test.superint;

public interface SuperInterface<G extends SuperInterface.
SuperInterfaceGetter, S extends SuperInterface.SuperInterfaceSetter> {
    public interface SuperInterfaceGetter {}

    public interface SuperInterfaceSetter {}
}

SubInterface.java:

package com.test.subint;

import com.test.superint.SuperInterface;

public interface SubInterface extends SuperInterface<SubInterface.
SubInterfaceGetter, SubInterface.SubInterfaceSetter> {
    public interface SubInterfaceGetter extends SuperInterfaceGetter {}

    public interface SubInterfaceSetter extends SuperInterfaceSetter {}
}

These two classes compiles without a problem in eclipse jdt, but fails when
compiling using javac or maven with the following error:

test\subint\SubInterface.java:6: cannot find symbol
symbol  : class SuperInterfaceGetter
location: interface test.subint.SubInterface
    public interface SubInterfaceGetter extends SuperInterfaceGetter {}
                                                ^
test\subint\SubInterface.java:8: cannot find symbol
symbol  : class SuperInterfaceSetter
location: interface test.subint.SubInterface
    public interface SubInterfaceSetter extends SuperInterfaceSetter {}
                                                ^
test\subint\SubInterface.java:5: type parameter
test.subint.SubInterface.SubInterfaceGetter is not within its bound
public interface SubInterface extends
SuperInterface<SubInterface.SubInterfaceGetter,
SubInterface.SubInterfaceSetter> {
                                                                 ^
test\subint\SubInterface.java:5: type parameter
test.subint.SubInterface.SubInterfaceSetter is not within its bound
public interface SubInterface extends
SuperInterface<SubInterface.SubInterfaceGetter,
SubInterface.SubInterfaceSetter> {
^
4 errors

To make it compile outside of eclipse, I have to add two imports to the
interface SubInterface.java:

import com.test.superint.SuperInterface.SuperInterfaceGetter;
import com.test.superint.SuperInterface.SuperInterfaceSetter;

But as soon as I do it, eclipse says these two imports are never used and
remove them if the "Remove unused imports" is enabled

Is there a way to get the jdt compiler to behave the same way as javac?

Thanks,

Martin



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