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

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

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

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

        if (context.testExpression("vpcId", targetDepth)) {
          describeVpcAttributeResult.setVpcId(
              StringStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("enableDnsSupport/value", targetDepth)) {
          describeVpcAttributeResult.setEnableDnsSupport(
              BooleanStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("enableDnsHostnames/value", targetDepth)) {
          describeVpcAttributeResult.setEnableDnsHostnames(
              BooleanStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }
      } else if (xmlEvent.isEndElement()) {
        if (context.getCurrentDepth() < originalDepth) {
          return describeVpcAttributeResult;
        }
      }
    }
  }