public EventDescription unmarshall(StaxUnmarshallerContext context) throws Exception {
    EventDescription eventDescription = new EventDescription();
    int originalDepth = context.getCurrentDepth();
    int targetDepth = originalDepth + 1;

    if (context.isStartOfDocument()) targetDepth += 1;

    while (true) {
      XMLEvent xmlEvent = context.nextEvent();
      if (xmlEvent.isEndDocument()) return eventDescription;

      if (xmlEvent.isAttribute() || xmlEvent.isStartElement()) {

        if (context.testExpression("EventDate", targetDepth)) {
          eventDescription.setEventDate(DateStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("Message", targetDepth)) {
          eventDescription.setMessage(StringStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("ApplicationName", targetDepth)) {
          eventDescription.setApplicationName(
              StringStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("VersionLabel", targetDepth)) {
          eventDescription.setVersionLabel(
              StringStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("TemplateName", targetDepth)) {
          eventDescription.setTemplateName(
              StringStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("EnvironmentName", targetDepth)) {
          eventDescription.setEnvironmentName(
              StringStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("RequestId", targetDepth)) {
          eventDescription.setRequestId(StringStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("Severity", targetDepth)) {
          eventDescription.setSeverity(StringStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }
      } else if (xmlEvent.isEndElement()) {
        if (context.getCurrentDepth() < originalDepth) {
          return eventDescription;
        }
      }
    }
  }