How is the ___init() method generated and called for the interceptors?

dmitrii_fediuk · October 14, 2017, 5:25pm

1. Magento\Framework\Interception\Code\Generator\Interceptor::_getDefaultConstructorDefinition()

Magento 2.2.0

magento/magento2/blob/2.2.0/lib/internal/Magento/Framework/Interception/Code/Generator/Interceptor.php#L35-L59


/**
 * Get default constructor definition for generated class
 *
 * @return array
 */
protected function _getDefaultConstructorDefinition()
{
    $reflectionClass = new \ReflectionClass($this->getSourceClassName());
    $constructor = $reflectionClass->getConstructor();
    $parameters = [];
    $body = "\$this->___init();\n";
    if ($constructor) {
        foreach ($constructor->getParameters() as $parameter) {
            $parameters[] = $this->_getMethodParameterInfo($parameter);
        }
        $body .= count($parameters)
            ? "parent::__construct({$this->_getParameterList($parameters)});"
            : "parent::__construct();";
    }
    return [
        'name' => '__construct',
        'parameters' => $parameters,
        'body' => $body
    ];
}

Magento 2.0.0

github.com

magento/magento2/blob/2.0.0/lib/internal/Magento/Framework/Interception/Code/Generator/Interceptor.php#L37-L63


/**
 * Get default constructor definition for generated class
 *
 * @return array
 */
protected function _getDefaultConstructorDefinition()
{
    $reflectionClass = new \ReflectionClass($this->getSourceClassName());
    $constructor = $reflectionClass->getConstructor();
    $parameters = [];
    if ($constructor) {
        foreach ($constructor->getParameters() as $parameter) {
            $parameters[] = $this->_getMethodParameterInfo($parameter);
        }
    }


    return [
        'name' => '__construct',
        'parameters' => $parameters,
        'body' => "\$this->___init();\n" .
        (count(
            $parameters
        ) ? "parent::__construct({$this->_getParameterList(
            $parameters
        )});" : '')
    ];
}

2. Magento\Framework\Interception\Interceptor::___init()

Magento 2.2.0

github.com

magento/magento2/blob/2.2.0/lib/internal/Magento/Framework/Interception/Interceptor.php#L35-L47


/**
 * Initialize the Interceptor
 *
 * @return void
 */
public function ___init()
{
    $this->pluginList = ObjectManager::getInstance()->get(PluginListInterface::class);
    $this->subjectType = get_parent_class($this);
    if (method_exists($this->subjectType, '___init')) {
        parent::___init();
    }
}

Magento 2.0.0

github.com

magento/magento2/blob/2.0.0/lib/internal/Magento/Framework/Interception/Interceptor.php#L49-L63


/**
 * Initialize the Interceptor
 *
 * @return void
 */
public function ___init()
{
    $this->pluginLocator = ObjectManager::getInstance();
    $this->pluginList = $this->pluginLocator->get('Magento\Framework\Interception\PluginListInterface');
    $this->chain = $this->pluginLocator->get('Magento\Framework\Interception\ChainInterface');
    $this->subjectType = get_parent_class($this);
    if (method_exists($this->subjectType, '___init')) {
        parent::___init();
    }
}