Definition of Drupal\Component\Plugin\Factory\ReflectionFactory.
<?php
/**
* @file
* Definition of Drupal\Component\Plugin\Factory\ReflectionFactory.
*/
namespace Drupal\Component\Plugin\Factory;
use ReflectionClass;
/**
* A plugin factory that maps instance configuration to constructor arguments.
*
* Provides logic for any basic plugin type that needs to provide individual
* plugins based upon some basic logic.
*/
class ReflectionFactory extends DefaultFactory {
/**
* Implements Drupal\Component\Plugin\Factory\FactoryInterface::createInstance().
*/
public function createInstance($plugin_id, array $configuration) {
$plugin_definition = $this->discovery
->getDefinition($plugin_id);
$plugin_class = static::getPluginClass($plugin_id, $plugin_definition);
// Lets figure out of there's a constructor for this class and pull
// arguments from the $options array if so to populate it.
$reflector = new ReflectionClass($plugin_class);
if ($reflector
->hasMethod('__construct')) {
$arguments = $this
->getInstanceArguments($reflector, $plugin_id, $plugin_definition, $configuration);
$instance = $reflector
->newInstanceArgs($arguments);
}
else {
$instance = new $plugin_class();
}
return $instance;
}
/**
* Inspects the plugin class and build a list of arguments for the constructor.
*
* This is provided as a helper method so factories extending this class can
* replace this and insert their own reflection logic.
*
* @param ReflectionClass $reflector
* The reflector object being used to inspect the plugin class.
* @param string $plugin_id
* The identifier of the plugin implementation.
* @param array $plugin_definition
* The definition associated to the plugin_id.
* @param array $configuration
* An array of configuration that may be passed to the instance.
*
* @return array
* An array of arguments to be passed to the constructor.
*/
protected function getInstanceArguments(ReflectionClass $reflector, $plugin_id, array $plugin_definition, array $configuration) {
$arguments = array();
foreach ($reflector
->getMethod('__construct')
->getParameters() as $param) {
$param_name = $param
->getName();
if ($param_name == 'plugin_id') {
$arguments[] = $plugin_id;
}
elseif ($param_name == 'plugin_definition') {
$arguments[] = $plugin_definition;
}
elseif ($param_name == 'configuration') {
$arguments[] = $configuration;
}
elseif (isset($configuration[$param_name]) || array_key_exists($param_name, $configuration)) {
$arguments[] = $configuration[$param_name];
}
elseif ($param
->isDefaultValueAvailable()) {
$arguments[] = $param
->getDefaultValue();
}
else {
$arguments[] = NULL;
}
}
return $arguments;
}
}
Name | Description |
---|---|
ReflectionFactory | A plugin factory that maps instance configuration to constructor arguments. |