protected function _save(array $params = array()) {
		$defaults = array('namespace' => null, 'class' => null);
		$params += $defaults;

		if (empty($params['class']) || empty($this->_library['path'])) {
			return false;
		}
		$contents = $this->_template();
		$result = String::insert($contents, $params);

		$path = str_replace('\\', '/', "{$params['namespace']}\\{$params['class']}");
		$path = $this->_library['path'] . stristr($path, '/');
		$file = str_replace('//', '/', "{$path}.php");
		$directory = dirname($file);

		if ((!is_dir($directory)) && !mkdir($directory, 0755, true)) {
			return false;
		}
		if (file_exists($file)) {
			$prompt = "{$file} already exists. Overwrite?";
			$choices = array('y', 'n');
			if ($this->in($prompt, compact('choices')) != 'y') {
				return "{$params['class']} skipped.";
			}
		}
		if (file_put_contents($file, "<?php\n\n{$result}\n\n?>")) {
			return "{$params['class']} created in {$params['namespace']}.";
		}
		return false;
	}