private String extractLastMessageFromOperationalInformation( EnvironmentalPerformanceInformationType environmentalPerformanceInformationType) { if (environmentalPerformanceInformationType.getLastMessageTimestamp() == null) { return null; } Date timestamp = XmlTypeConverter.toDate(environmentalPerformanceInformationType.getLastMessageTimestamp()); return timestamp + ": " + environmentalPerformanceInformationType.getLastMessage(); }