getCustomer.php

    /**
     * Retrieve Customer instance
     *
     * @return \Magento\Customer\Api\Data\CustomerInterface
     */
    public function getCustomer()
    {
        if (is_null($this->_customer)) {
            $params = $this->urlDecoder->decode($this->_getRequest()->getParam('data'));
            $data   = explode(',', $params);
            $customerId    = abs(intval($data[0]));
            if ($customerId && ($customerId == $this->_customerSession->getCustomerId())) {
                $this->_customer = $this->_customerRepository->getById($customerId);
            } else {
                $this->_customer = $this->_customerBuilder->create();
            }
        }

        return $this->_customer;
    }