if (configuration.getString(SqlObjectStore.BASE_NAME + ".jdbc.driver") == null) {
if (configuration.getString("isis.persistor") == "in-memory") {
persistenceMechanismInstaller = new InMemoryPersistenceMechanismInstaller();
} else {
persistenceMechanismInstaller = new XmlPersistenceMechanismInstaller();
}
} else {
persistenceMechanismInstaller = new SqlPersistorInstaller();
}