cakephp/src/Console/TaskRegistry.php

<?php
/**
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @since         2.0.0
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */
namespace Cake\Console;

use Cake\Core\App;
use Cake\Error;
use Cake\Utility\ObjectRegistry;

/**
 * Registry for Tasks. Provides features
 * for lazily loading tasks.
 */
class TaskRegistry extends ObjectRegistry {

/**
 * Shell to use to set params to tasks.
 *
 * @var Shell
 */
	protected $_Shell;

/**
 * Constructor
 *
 * @param Shell $Shell
 */
	public function __construct(Shell $Shell) {
		$this->_Shell = $Shell;
	}

/**
 * Resolve a task classname.
 *
 * Part of the template method for Cake\Utility\ObjectRegistry::load()
 *
 * @param string $class Partial classname to resolve.
 * @return string|false Either the correct classname or false.
 */
	protected function _resolveClassName($class) {
		return App::classname($class, 'Console/Command/Task', 'Task');
	}

/**
 * Throws an exception when a task is missing.
 *
 * Part of the template method for Cake\Utility\ObjectRegistry::load()
 *
 * @param string $class The classname that is missing.
 * @param string $plugin The plugin the task is missing in.
 * @throws \Cake\Error\MissingTaskException
 */
	protected function _throwMissingClassError($class, $plugin) {
		throw new Error\MissingTaskException([
			'class' => $class,
			'plugin' => $plugin
		]);
	}

/**
 * Create the task instance.
 *
 * Part of the template method for Cake\Utility\ObjectRegistry::load()
 *
 * @param string $class The classname to create.
 * @param string $alias The alias of the task.
 * @return Component The constructed task class.
 */
	protected function _create($class, $alias) {
		return new $class(
			$this->_Shell->stdout,
			$this->_Shell->stderr,
			$this->_Shell->stdin
		);
	}

}