[qi4j-dev] Help in implementing the mixin inheritance

[Bong Gavin]

Hi,

I need some help to model my entities.

Scenario:

1.1 SubBase extends from Base.

1.2 Base's interface has 2 methods.

     Base#doSomething()
     Base#doSomethingElse()

Goal:

2.1 I want to query the repository for Base.

2.2 Then I want to be able to invoke both methods on it.

Invoking Base#doSomething() should be dispatched to the mixin for Base.
Invoking Base#doSomethingElse() should delegate to the mixin for SubBase.


Question:

Is this doable ?

Currently I'm getting an exception.

org.qi4j.spi.composite.ResolutionException: Could not find mixin for
method public abstract void rnd.Base.doSomethingElse() in composite
rnd.BaseComposite
        at 
org.qi4j.runtime.composite.CompositeResolver.getMixinForMethod(CompositeResolver.java:501)
        at 
org.qi4j.runtime.composite.CompositeResolver.getMixinsForMethods(CompositeResolver.java:464)


Full source:
--

public interface Base
{
    void doSomething();

    void doSomethingElse();
}

@Mixins( BaseMixin.class )
public interface BaseComposite
    extends Base, EntityComposite
{
}

public abstract class BaseMixin
    implements Base
{
    public void doSomething()
    {
        System.out.println( "doSomething" );
    }
    public abstract void doSomethingElse();
}

public interface SubBase
    extends Base
{
}

@Mixins( SubBaseMixin.class )
public interface SubBaseComposite
    extends SubBase, Composite
{
}

public abstract class SubBaseMixin
    extends BaseMixin
    implements SubBase
{
    @Override
    public void doSomethingElse()
    {
        System.out.println( "doSomethingElse" );
    }
}

Thanks

Regards,

Gavin

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