Php Dependency Injecttion in Zend 2 - php

Question

I have two classes. Lets says it is Album and AlbumManager. Album is a intake class which I am using for generating basic entity function. I do not want to touch Album for custom functions. All other custom function I wrote in AlbumManager class.
Now from controller, when I try to access Album class through AlbumManager, it through me an error:
Can not be mapped or accessed.
How can I handle this type of dependency? Here are the classes:
Album.php
<?php
namespace Album\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Album
*
* #ORM\Table(name="album")
* #ORM\Entity
*/
class Album
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer", precision=0, scale=0, nullable=false, unique=false)
* #ORM\Id
* #ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="artist", type="string", length=255, precision=0, scale=0, nullable=false, unique=false)
*/
private $artist;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set artist
*
* #param string $artist
* #return Album
*/
public function setArtist($artist)
{
$this->artist = $artist;
return $this;
}
/**
* Get artist
*
* #return string
*/
public function getArtist()
{
return $this->artist;
}
?>
AlbumManager.php
<?php
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
namespace Album\Manager;
use Album\Entity as Album;
use Zend\InputFilter\InputFilter;
use Zend\InputFilter\Factory as InputFactory;
use Zend\InputFilter\InputFilterInterface;
class AlbumManager
{
private $album;
protected $inputFilter;
public function __construct(Album\Entity $album)
{
$this->album = $album;
}
public function getAlbum()
{
return $this->album;
}
/**
* Magic getter to expose protected properties.
*
* #param string $property
* #return mixed
*/
public function __get($property)
{
return $this->$property;
}
/**
* Magic setter to save protected properties.
*
* #param string $property
* #param mixed $value
*/
public function __set($property, $value)
{
$this->$property = $value;
}
/**
* Convert the object to an array.
*
* #return array
*/
public function getArrayCopy()
{
return get_object_vars($this);
}
/**
* Populate from an array.
*
* #param array $data
*/
public function populate($data = array())
{
$this->album->setId($data['id']);
$this->album->setArtist($data['artist']);
$this->album->setTitle($data['title']);
}
public function setInputFilter(InputFilterInterface $inputFilter)
{
throw new \Exception("Not used");
}
public function getInputFilter()
{
if (!$this->inputFilter) {
$inputFilter = new InputFilter();
$factory = new InputFactory();
$inputFilter->add($factory->createInput(array(
'name' => 'id',
'required' => true,
'filters' => array(
array('name' => 'Int'),
),
)));
$inputFilter->add($factory->createInput(array(
'name' => 'artist',
'required' => true,
'filters' => array(
array('name' => 'StripTags'),
array('name' => 'StringTrim'),
),
'validators' => array(
array(
'name' => 'StringLength',
'options' => array(
'encoding' => 'UTF-8',
'min' => 1,
'max' => 100,
),
),
),
)));
$inputFilter->add($factory->createInput(array(
'name' => 'title',
'required' => true,
'filters' => array(
array('name' => 'StripTags'),
array('name' => 'StringTrim'),
),
'validators' => array(
array(
'name' => 'StringLength',
'options' => array(
'encoding' => 'UTF-8',
'min' => 1,
'max' => 100,
),
),
),
)));
$this->inputFilter = $inputFilter;
}
return $this->inputFilter;
}
}
AlbumController.php
<?php
namespace Album\Controller;
use Zend\Mvc\Controller\AbstractActionController,
Zend\View\Model\ViewModel,
Album\Form\AlbumForm,
Doctrine\ORM\EntityManager,
Doctrine\ORM\EntityRepository,
Album\Entity\Album,
Album\Manager\AlbumManager,
class AlbumController extends AbstractActionController
{
public function addAction()
{
$form = new AlbumForm();
$form->get('submit')->setAttribute('label', 'Add');
$request = $this->getRequest();
if ($request->isPost()) {
$album = new Album();
$albumManager = new AlbumManager($album);
$form->setInputFilter($album->getInputFilter());
$form->setData($request->getPost());
if ($form->isValid()) {
$album->populate($form->getData());
$this->getEntityManager()->persist($album);
$this->getEntityManager()->flush();
// Redirect to list of albums
return $this->redirect()->toRoute('album');
}
}
return array('form' => $form);
}
?>
See the code at AlbumController
$album = new Album();
$albumManager = new AlbumManager($album);
$form->setInputFilter($album->getInputFilter());
$form->setData($request->getPost());
if ($form->isValid()) {
$album->populate($form->getData());
The album object can not get access to the getInputFilter and populate function which I write down in the Album Repository. I understood this happened because of the dependency injected. But what would be the solution so that I can access the album object, set the form data and also can use the album manger functions?