@Override
protected Object retrieve(Context context) {
Collection<Reference<?>> references = context.getReferences(getTargetInterfaceName(), filter);
if (references == null || references.isEmpty()) {
return null;
}
if (references.size() > 1) {
throw new IllegalStateException(
this + " mapped to " + references.size() + " instances: " + references);
}
reference = references.iterator().next();
return reference.getService();
}
@Override
protected void wasDisposed() {
reference.unget();
}