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

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

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

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

        if (context.testExpression("Quantity", targetDepth)) {
          cacheBehaviors.setQuantity(IntegerStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("Items/CacheBehavior", targetDepth)) {
          cacheBehaviors.withItems(CacheBehaviorStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

      } else if (xmlEvent.isEndElement()) {
        if (context.getCurrentDepth() < originalDepth) {
          return cacheBehaviors;
        }
      }
    }
  }