How are the payment methods classes instantiated?

dmitry_fedyuk · February 7, 2016, 1:53am

magento/magento2/blob/6ce74b2/app/code/Magento/Checkout/view/frontend/layout/checkout_index_index.xml#L11-L11


<block class="Magento\Checkout\Block\Onepage" name="checkout.root" template="onepage.phtml" cacheable="false">

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Checkout/Block/Onepage.php#L49-L49


\Magento\Checkout\Model\CompositeConfigProvider $configProvider,

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Checkout/etc/frontend/di.xml#L46-L52


<type name="Magento\Checkout\Model\CompositeConfigProvider">
    <arguments>
        <argument name="configProviders" xsi:type="array">
            <item name="checkout_default_config_provider" xsi:type="object">Magento\Checkout\Model\DefaultConfigProvider</item>
        </argument>
    </arguments>
</type>

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Paypal/etc/frontend/di.xml#L65-L74


<type name="Magento\Checkout\Model\CompositeConfigProvider">
    <arguments>
        <argument name="configProviders" xsi:type="array">
            <item name="paypal_express_config_provider" xsi:type="object">Magento\Paypal\Model\ExpressConfigProvider</item>
            <item name="paypal_iframe_config_provider" xsi:type="object">Magento\Paypal\Model\IframeConfigProvider</item>
            <item name="paypal_billing_agreement_config_provider" xsi:type="object">Magento\Paypal\Model\BillingAgreementConfigProvider</item>
            <item name="paypal_iframe_cc_config_provider" xsi:type="object">PaypalIframeCcConfigProvider</item>
        </argument>
    </arguments>
</type>

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Paypal/Model/ExpressConfigProvider.php#L36-L44


/**
 * @var string[]
 */
protected $methodCodes = [
    Config::METHOD_WPP_BML,
    Config::METHOD_WPP_PE_EXPRESS,
    Config::METHOD_WPP_EXPRESS,
    Config::METHOD_WPP_PE_BML
];

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Paypal/Model/ExpressConfigProvider.php#L76-L78


foreach ($this->methodCodes as $code) {
    $this->methods[$code] = $this->paymentHelper->getMethodInstance($code);
}

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Payment/Helper/Data.php#L93-L113


/**
 * Retrieve method model object
 *
 * @param string $code
 *
 * @throws \Magento\Framework\Exception\LocalizedException
 * @return MethodInterface
 */
public function getMethodInstance($code)
{
    $class = $this->scopeConfig->getValue(
        $this->getMethodModelConfigName($code),
        \Magento\Store\Model\ScopeInterface::SCOPE_STORE
    );


    if (!$class) {
        throw new \UnexpectedValueException('Payment model name is not provided in config!');
    }


    return $this->_methodFactory->create($class);
}

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Payment/Model/Method/Factory.php#L30-L47


/**
 * Creates new instances of payment method models
 *
 * @param string $className
 * @param array $data
 * @return \Magento\Payment\Model\MethodInterface
 * @throws \Magento\Framework\Exception\LocalizedException
 */
public function create($className, $data = [])
{
    $method = $this->_objectManager->create($className, $data);
    if (!$method instanceof \Magento\Payment\Model\MethodInterface) {
        throw new \Magento\Framework\Exception\LocalizedException(
            __('%1 class doesn\'t implement \Magento\Payment\Model\MethodInterface', $className)
        );
    }
    return $method;
}

dmitry_fedyuk · February 8, 2016, 5:11am