protected static function conf_initialize ()
{
if (!defined('COREN_CONFIGURATION_FILE'))
throw new coren_exception_config_/*!!!*/("Config file is not set.");
self::$conf_document = new DOMDocument(self::conf_xml_version, self::conf_xml_encoding);
$old_errors = libxml_use_internal_errors(true);
$loaded = self::$conf_document->load(COREN_CONFIGURATION_FILE, LIBXML_COMPACT | LIBXML_XINCLUDE);
libxml_use_internal_errors($old_errors);
if (!$loaded)
{
$error = libxml_get_last_error();
if (is_null($error))
throw new coren_exception_configuration_file("Failed to load configuration file with unknown error.");
else
throw new coren_exception_configuration_file("Failed to load configuration file: " . $error->message);
}
self::$conf_xpath = new DOMXPath(self::$conf_document);
self::$conf_xpath->registerNamespace("coren", self::conf_xml_ns_uri);
//!!!todo: 2. make node selectable for script via constants (maybe some special 'id/name' attribute?).
//!!!todo: 3. make required(!) attribute coren:target, which must have value 'php'?
$query = "//coren:configuration";//NB: it can be non-root.(???)
$nodes = self::$conf_xpath->query($query);
/*xcc*/ if ($nodes->length > 1) throw new coren_exception_configuration_element("Only one top-level element allowed, but there is {$nodes->length}.");
if ($nodes->length < 1) throw new coren_exception_configuration_element("At least one top-level element required, but there are none.");
self::$conf_element = $nodes->item(0);
}
