/**
* Read the configuration for the cache itself into the member variable $this->config
*
* This always bypasses the cache so changes of the configuration of the config system itself
* take effect immediately without the need to clear the cache.
*
* @return array Hierarchic configuration array from the 'config' section, with each configuration token as a key
*/
private function getConfig()
{
if ($this->config !== null) {
return;
}
$this->config = $this->configIO->read(self::SECTION_CONFIG);
}
/**
* Gets the tokens of a configuration key. This method will read the configuration for the section token (first token) if it has not been read before.
* @return array Array with the tokens of the configuration key
*/
private function getKeyTokens($key)
{
if (String::isEmpty($key)) {
throw new ConfigException('Provided key is empty');
}
$tokens = explode(self::TOKEN_SEPARATOR, $key);
$section = $tokens[0];
if (!isset($this->data[$section])) {
$this->data[$section] = $this->io->read($section);
}
return $tokens;
}