File "Definition.php"
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<?php
/**
* An extension to the Definition class to prevent constructor injection from being possible.
*/
namespace Automattic\WooCommerce\Internal\DependencyManagement;
use Automattic\WooCommerce\Vendor\League\Container\Definition\Definition as BaseDefinition;
/**
* An extension of the definition class that replaces constructor injection with method injection.
*/
class Definition extends BaseDefinition {
/**
* The standard method that we use for dependency injection.
*/
public const INJECTION_METHOD = 'init';
/**
* Resolve a class using method injection instead of constructor injection.
*
* @param string $concrete The concrete to instantiate.
*
* @return object
*/
protected function resolveClass( string $concrete ) {
$instance = new $concrete();
$this->invokeInit( $instance );
return $instance;
}
/**
* Invoke methods on resolved instance, including 'init'.
*
* @param object $instance The concrete to invoke methods on.
*
* @return object
*/
protected function invokeMethods( $instance ) {
$this->invokeInit( $instance );
parent::invokeMethods( $instance );
return $instance;
}
/**
* Invoke the 'init' method on a resolved object.
*
* Constructor injection causes backwards compatibility problems
* so we will rely on method injection via an internal method.
*
* @param object $instance The resolved object.
* @return void
*/
private function invokeInit( $instance ) {
$resolved = $this->resolveArguments( $this->arguments );
if ( method_exists( $instance, static::INJECTION_METHOD ) ) {
call_user_func_array( array( $instance, static::INJECTION_METHOD ), $resolved );
}
}
/**
* Forget the cached resolved object, so the next time it's requested
* it will be resolved again.
*/
public function forgetResolved() {
$this->resolved = null;
}
}