Example.php

<?php


namespace Test\Job\CompanyBundle\Entity\Listener;


use Test\CoreBundle\Entity\Address;
use Doctrine\ORM\Event\LifecycleEventArgs;
use Symfony\Component\DependencyInjection\ContainerInterface;

class CompanyAddressListener
{
    /** @var ContainerInterface $container */
    protected $container;

    public function __construct(ContainerInterface $container)
    {
        $this->container = $container;
    }

    public function postUpdate(LifecycleEventArgs $event)
    {
        $entity = $event->getEntity();

        if ($entity instanceof Address) {

            //Check if Address is a part of Company....
        }

    }
}

<?php


namespace Test\CoreBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;

/**
 * Class Address
 * @package CoreBundle\Entity
 *
 * Address
 *
 * @ORM\Table()
 * @ORM\Entity()
 */
class Address
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="phone", type="string", length=10, nullable=true)
     */
    private $phone;

    /**
     * @var string
     *
     * @ORM\Column(name="address", type="string", length=255, nullable=true)
     * @Assert\NotBlank(groups={"createJob"})
     */
    private $address;

    /**
     * @var string
     *
     * @ORM\Column(name="city", type="string", length=100, nullable=true)
     */
    private $city;

    /**
     * @var string
     *
     * @ORM\Column(name="state", type="string", length=2, nullable=true)
     */
    private $state;

    /**
     * @var string
     *
     * @ORM\Column(name="zipCode", type="string", length=10, nullable=true)
     */
    private $zipCode;

    /**
     * @return int
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * @param int $id
     * @return Address
     */
    public function setId($id)
    {
        $this->id = $id;
        return $this;
    }

    /**
     * @return string
     */
    public function getPhone()
    {
        return $this->phone;
    }

    /**
     * @param string $phone
     * @return Address
     */
    public function setPhone($phone)
    {
        $this->phone = $phone;
        return $this;
    }

    /**
     * @return string
     */
    public function getAddress()
    {
        return $this->address;
    }

    /**
     * @param string $address
     * @return Address
     */
    public function setAddress($address)
    {
        $this->address = $address;
        return $this;
    }

    /**
     * @return string
     */
    public function getCity()
    {
        return $this->city;
    }

    /**
     * @param string $city
     * @return Address
     */
    public function setCity($city)
    {
        $this->city = $city;
        return $this;
    }

    /**
     * @return string
     */
    public function getState()
    {
        return $this->state;
    }

    /**
     * @param string $state
     * @return Address
     */
    public function setState($state)
    {
        $this->state = $state;
        return $this;
    }

    /**
     * @return string
     */
    public function getZipCode()
    {
        return $this->zipCode;
    }

    /**
     * @param string $zipCode
     * @return Address
     */
    public function setZipCode($zipCode)
    {
        $this->zipCode = $zipCode;
        return $this;
    }

}

<?php

namespace Test\Job\CompanyBundle\Entity;

use Test\CoreBundle\Entity\Address;
use Test\CoreBundle\Model\RepositoryMethod;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;
use Gedmo\Timestampable\Traits\TimestampableEntity;
use Test\Job\JobBundle\Entity\Job;
use JMS\Serializer\Annotation\SerializedName;
use JMS\Serializer\Annotation\VirtualProperty;

/**
 * Company
 *
 * @ORM\Table()
 * @ORM\Entity(repositoryClass="Test\Job\CompanyBundle\Entity\CompanyRepository")
 * @ORM\EntityListeners({"Test\Job\CompanyBundle\Entity\Listener\CompanyListener"})
 */
class Company
{

    use TimestampableEntity;

    use RepositoryMethod;

    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="name", type="string", length=155)
     */
    private $name;

    /**
     * @var string
     *
     * @ORM\Column(name="contact", type="string", length=255, nullable=true)
     */
    private $contact;

    /**
     * @ORM\ManyToOne(targetEntity="Test\CoreBundle\Entity\Address", cascade={"persist"})
     */
    private $address;

    /**
     * @var string
     *
     * @ORM\Column(name="customer_po", type="string", length=255, nullable=true)
     */
    private $customerPo;

    /**
     * @ORM\OneToMany(targetEntity="Test\Job\JobBundle\Entity\Job", mappedBy="company", cascade={"persist"})
     */
    private $jobs;

    /**
     * @var string
     *
     * @ORM\Column(name="quickbooksID", type="string", length=100, nullable=true)
     */
    private $quickbooksID;

    public function __construct()
    {
        $this->jobs = new ArrayCollection();
        $this->setCreatedAt(new \DateTime());
        $this->setUpdatedAt(new \DateTime());
    }

    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * @param $id
     * @return Company
     */
    public function setId($id)
    {
        $this->id = $id;

        return $this;
    }

    /**
     * Set name
     *
     * @param string $name
     *
     * @return Company
     */
    public function setName($name)
    {
        $this->name = $name;

        return $this;
    }

    /**
     * Get name
     *
     * @return string
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * Set contact
     *
     * @param string $contact
     *
     * @return Company
     */
    public function setContact($contact)
    {
        $this->contact = $contact;

        return $this;
    }

    /**
     * Get contact
     *
     * @return string
     */
    public function getContact()
    {
        return $this->contact;
    }

    /**
     * Set address
     *
     * @param Address $address
     *
     * @return Company
     */
    public function setAddress($address)
    {
        $this->address = $address;

        return $this;
    }

    /**
     * Get address
     *
     * @return Address
     */
    public function getAddress()
    {
        return $this->address;
    }

    /**
     * @return string
     */
    public function getCustomerPo()
    {
        return $this->customerPo;
    }

    /**
     * @param string $customerPo
     * @return Company
     */
    public function setCustomerPo($customerPo)
    {
        $this->customerPo = $customerPo;
        return $this;
    }

    /**
     * @return Job[]
     */
    public function getJobs()
    {
        return $this->jobs;
    }

    public function addJobs(Job $job)
    {
        $this->jobs->add($job);

        return $this;
    }

    public function removeJobs(Job $job)
    {
        $this->jobs->removeElement($job);

        return $this;
    }

    /**
     * @return string
     */
    public function getQuickbooksID()
    {
        return $this->quickbooksID;
    }

    /**
     * @param string $quickbooksID
     * @return Company
     */
    public function setQuickbooksID($quickbooksID)
    {
        $this->quickbooksID = $quickbooksID;
        return $this;
    }

}