<?php
/**
 * An ActiveTask visitor
 *
 * @author		Roland Haeder <webmaster@ship-simu.org>
 * @version		0.0.0
 * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 Hub Developer Team
 * @license		GNU GPL 3.0 or any newer version
 * @link		http://www.ship-simu.org
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
class ActiveTaskVisitor extends BaseVisitor implements TaskVisitor, QueryConnectorVisitor, PoolVisitor {
	/**
	 * Protected constructor
	 *
	 * @return	void
	 */
	protected function __construct () {
		// Call parent constructor
		parent::__construct(__CLASS__);

		// Set visitor mode
		$this->setVisitorMode('task');
	}

	/**
	 * Creates an instance of this class
	 *
	 * @return	$visitorInstance		An instance a Visitorable class
	 */
	public final static function createActiveTaskVisitor () {
		// Get new instance
		$visitorInstance = new ActiveTaskVisitor();

		// Return the prepared instance
		return $visitorInstance;
	}

	/**
	 * Visits the given pool instance
	 *
	 * @param	$poolInstance	A Taskable instance
	 * @return	void
	 */
	public function visitTask (Taskable $taskInstance) {
		// Execute the task from this visitor
		$taskInstance->execute();
	}

	/**
	 * Connector visitor method for active tasks
	 *
	 * @param	$connectorInstance	A Connectable instance
	 * @return	void
	 */
	public function visitQueryConnector (Connectable $connectorInstance) {
		// Handle all queries
		$connectorInstance->handleQueryConnector();
	}

	/**
	 * Pool visitor method for active tasks
	 *
	 * @param	$poolInstance	A Poolable instance
	 * @return	void
	 */
	public function visitPool (Poolable $poolInstance) {
		// We don't need to visit a pool as an active task because a pool can
		// never become a task. Instead e.g. by a listener pool we should visit
		// all listeners one by one
	}
}

// [EOF]
?>