private static void configureRegex(JsonNode document, ExternalConfigurationModel model)
throws InvalidConfigurationException {
String regex = StreamAggregatorUtils.readValueAsString(document, "regularExpression");
if (regex == null || regex.equals(""))
throw new InvalidConfigurationException(
"Cannot configure a Regular Expression Aggregator without a Regular Expression (configuration 'regularExpression'");
model.setRegularExpression(regex);
}
