Symfony\Component\Validator\Mapping\Loader\XmlFileLoader::loadClassesFromXml PHP Method

    private function loadClassesFromXml()
    {
        // This method may throw an exception. Do not modify the class'
        // state before it completes
        $xml = $this->parseFile($this->file);
        $this->classes = array();
        foreach ($xml->namespace as $namespace) {
            $this->addNamespaceAlias((string) $namespace['prefix'], trim((string) $namespace));
        }
        foreach ($xml->class as $class) {
            $this->classes[(string) $class['name']] = $class;
        }
    }