Zend Framework 2 dependency injection via interface - dependency-injection

Question

How do I specify which implementation of an interface a specific class needs for setter injection?
I have a working eg for constructor injection but not for setters.
class Lister1 {
public $finder;
public function setFinder(Finder $finder){
$this->finder = $finder;
}
}
interface Finder {
public function findAllByName($name);
}
class FinderImpl1 implements Finder {
public function findAllByName($name) {}
}
Now for the above the following code works.
$di = new Di();
$di->instanceManager()->addTypePreference(
'Finder',
'FinderImpl1'
);
$lister = $di->get('Lister1');
But what if I have the following as well
class Lister2 extends Lister1{
}
class FinderImpl2 implements Finder {
public function findAllByName($name) {//assume a different impl}
}
So Lister1 needs FinderImpl1 injected & Lister2 needs FinderImpl2 injected.
Can we add a type preference on a per-class basis?
I had a look at the unit tests that ship with zf2 and nothing leaped out.

Answer 1

It looks like you've found Ralph's DI examples. Good. That was going to be my first suggestion. :)
I may be wrong (been a while since I used DI), but it might be simpler than you are thinking.
Using setter injection like so:
$di = new Zend\Di\Di;
$di->configure(new Zend\Di\Config(array(
'instance' => array(
'Lister1' => array(
'parameters' => array(
'finder' => 'FinderImpl1',
),
),
'Lister2' => array(
'parameters' => array(
'finder' => 'FinderImpl2',
),
),
)
)));
If you were going to define an instance of an interface, then you would need to worry about setting a "preference"; in which case if you had something tricky, you might consider using some aliases along with the preference definition.