1: <?php
 2: /**
 3:  * Top level injector class for returning the default binding for an object
 4:  *
 5:  * This class returns a Horde_Injector_Binder_Implementation with the requested
 6:  * $interface mapped to itself.  This is the default case, and for conrete
 7:  * classes should work all the time so long as you constructor parameters are
 8:  * typed.
 9:  *
10:  * @author   Bob Mckee <bmckee@bywires.com>
11:  * @author   James Pepin <james@jamespepin.com>
12:  * @category Horde
13:  * @package  Injector
14:  */
15: class Horde_Injector_TopLevel implements Horde_Injector_Scope
16: {
17:     /**
18:      * Get an Implementation Binder that maps the $interface to itself
19:      *
20:      * @param string $interface  The interface to retrieve binding information
21:      *                           for.
22:      *
23:      * @return Horde_Injector_Binder_ImplementationWithSetters
24:      *          A new binding object that maps the interface to itself, with
25:      *          setter injection.
26:      */
27:     public function getBinder($interface)
28:     {
29:         $dependencyFinder = new Horde_Injector_DependencyFinder();
30:         $implementationBinder = new Horde_Injector_Binder_Implementation($interface, $dependencyFinder);
31: 
32:         return new Horde_Injector_Binder_AnnotatedSetters($implementationBinder, $dependencyFinder);
33:     }
34: 
35:     /**
36:      * Always return null.  Object doesn't keep instance references
37:      *
38:      * Method is necessary because this object is the default parent Injector.
39:      * The child of this injector will ask it for instances in the case where
40:      * no bindings are set on the child.  This should always return null.
41:      *
42:      * @param string $interface The interface in question
43:      * @return null
44:      */
45:     public function getInstance($interface)
46:     {
47:         return null;
48:     }
49: 
50: }
51: