private static void UnmarshallResult(XmlUnmarshallerContext context, SelectResponse response)
{
int originalDepth = context.CurrentDepth;
int targetDepth = originalDepth + 1;
if (context.IsStartOfDocument)
targetDepth += 2;
while (context.ReadAtDepth(originalDepth))
{
if (context.IsStartElement || context.IsAttribute)
{
if (context.TestExpression("Item", targetDepth))
{
var unmarshaller = ItemUnmarshaller.Instance;
var item = unmarshaller.Unmarshall(context);
response.Items.Add(item);
continue;
}
if (context.TestExpression("NextToken", targetDepth))
{
var unmarshaller = StringUnmarshaller.Instance;
response.NextToken = unmarshaller.Unmarshall(context);
continue;
}
}
}
return;
}
public override AmazonWebServiceResponse Unmarshall(XmlUnmarshallerContext context)
{
SelectResponse response = new SelectResponse();
context.Read();
int targetDepth = context.CurrentDepth;
while (context.ReadAtDepth(targetDepth))
{
if (context.IsStartElement)
{
if(context.TestExpression("SelectResult", 2))
{
UnmarshallResult(context, response);
continue;
}
if (context.TestExpression("ResponseMetadata", 2))
{
response.ResponseMetadata = ResponseMetadataUnmarshaller.Instance.Unmarshall(context);
}
}
}
return response;
}
SelectResponse AmazonSimpleDB.Select(SelectRequest request)
{
var match = QueryAnalyzer.Match(request.SelectExpression);
if (!match.Success)
{
throw new InvalidOperationException("The specified request does not contain a valid select expression.");
}
var attributes = match.Groups[1].Value;
var domain = match.Groups[2].Value;
Dictionary<string, Dictionary<string, string>> items;
if (!Domains.TryGetValue(domain, out items))
{
throw new InvalidOperationException("The specified domain does not exist.");
}
var skip = 0;
if (request.IsSetNextToken())
{
int.TryParse(request.NextToken, out skip);
}
var result = new SelectResponse()
.WithSelectResult(new SelectResult()
.WithItem(IntoItem(items
.Skip(skip)
.Take(MaxItems))));
if (result.SelectResult.Item.Count == MaxItems)
{
result.SelectResult.WithNextToken((skip + MaxItems).ToString());
}
++SelectCount;
return result;
}
private static void UnmarshallResult(XmlUnmarshallerContext context,SelectResponse response)
{
int originalDepth = context.CurrentDepth;
int targetDepth = originalDepth + 1;
if (context.IsStartOfDocument)
targetDepth += 2;
while (context.Read())
{
if (context.IsStartElement || context.IsAttribute)
{
if (context.TestExpression("Item", targetDepth))
{
response.Items.Add(ItemUnmarshaller.GetInstance().Unmarshall(context));
continue;
}
if (context.TestExpression("NextToken", targetDepth))
{
response.NextToken = StringUnmarshaller.GetInstance().Unmarshall(context);
continue;
}
}
else if (context.IsEndElement && context.CurrentDepth < originalDepth)
{
return;
}
}
return;
}