Method execute

/**
 * Execute a task by triggering a method in the derived class.
 *
 * @param   string  $task  The task to perform. If no matching task is found, the '__default' task is executed, if defined.
 *
 * @return  mixed   The value returned by the called method.
 *
 * @since   3.0
 * @throws  \Exception
 */
public function execute($task)
{
    $this->task = $task;
    $task = strtolower((string) $task);
    if (isset($this->taskMap[$task])) {
        $doTask = $this->taskMap[$task];
    } elseif (isset($this->taskMap['__default'])) {
        $doTask = $this->taskMap['__default'];
    } else {
        throw new \Exception(Text::sprintf('JLIB_APPLICATION_ERROR_TASK_NOT_FOUND', $task), 404);
    }
    // Record the actual task being fired
    $this->doTask = $doTask;
    return $this->{$doTask}();
}