/// <summary>
/// Generates the XML for the parameters for the "GetThings" request.
/// </summary>
///
/// <returns>
/// An XML string defining the parameters for the "GetThings" call.
/// </returns>
///
/// <exception cref="HealthServiceException">
/// No filters have been specified.
/// </exception>
///
internal string GetParametersXml()
{
if (Filters.Count == 0)
{
HealthServiceResponseError error = new HealthServiceResponseError();
error.Message = Resources.HealthRecordSearcherNoFilters;
HealthServiceException e =
HealthServiceExceptionHelper.GetHealthServiceException(
HealthServiceStatusCode.InvalidFilter, error);
throw e;
}
StringBuilder parameters = new StringBuilder(128);
XmlWriterSettings settings = SDKHelper.XmlUnicodeWriterSettings;
using (XmlWriter writer = XmlWriter.Create(parameters, settings))
{
foreach (ThingQuery filter in Filters)
{
// Add all filters
filter.AddFilterXml(writer);
}
writer.Flush();
}
return(parameters.ToString());
}
/// <summary>
/// Checks whether at least one property is set.
/// </summary>
///
/// <exception cref="HealthServiceException">
/// One of the following is true:
/// (1) The filter has no properties set;
/// (2) Both ItemIds and ItemKeys are specified; or
/// (3) There are more than the allowable number of order by clauses.
/// </exception>
///
internal void ThrowIfNotValid()
{
bool isValid = AreFiltersPresent();
// if no filters are present,
// at least one of ItemKeys or ItemIds should be non-empty
isValid |=
ItemKeys.Count != 0 ||
ItemIds.Count != 0 ||
ClientItemIds.Count != 0;
if (!isValid)
{
HealthServiceResponseError error = new HealthServiceResponseError
{
Message = Resources.HealthRecordSearcherInvalidFilter
};
HealthServiceException e =
HealthServiceExceptionHelper.GetHealthServiceException(
HealthServiceStatusCode.InvalidFilter,
error);
throw e;
}
int idTypesSpecified =
ItemKeys.Count > 0 ? 1 : 0 +
ItemIds.Count > 0 ? 1 : 0 +
ClientItemIds.Count > 0 ? 1 : 0;
// only one of ItemKeys or ItemIds can be non-empty
// throw a specific error in this particular case
if (idTypesSpecified > 1)
{
HealthServiceResponseError error = new HealthServiceResponseError
{
Message = Resources.HealthRecordSearcherInvalidFilterIdsAndKeysSpecified
};
HealthServiceException e = HealthServiceExceptionHelper.GetHealthServiceException(
HealthServiceStatusCode.InvalidFilter,
error);
throw e;
}
if (OrderByClauses.Count > 1)
{
HealthServiceResponseError error = new HealthServiceResponseError
{
Message = Resources.HealthRecordSearcherInvalidOrderSpecified
};
HealthServiceException e =
HealthServiceExceptionHelper.GetHealthServiceException(
HealthServiceStatusCode.InvalidFilter,
error);
throw e;
}
}
/// <summary>
/// <see cref="IHealthServiceResponseParser.ParseResponseAsync"/>
/// </summary>
public async Task <HealthServiceResponseData> ParseResponseAsync(HttpResponseMessage response)
{
using (Stream responseStream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false))
{
using (var reader = new StreamReader(responseStream, Encoding.UTF8, false, 1024))
{
HealthServiceResponseData result =
new HealthServiceResponseData {
ResponseHeaders = response.Headers
};
XmlReaderSettings settings = SDKHelper.XmlReaderSettings;
settings.CloseInput = false;
settings.IgnoreWhitespace = false;
XmlReader xmlReader = XmlReader.Create(reader, settings);
xmlReader.NameTable.Add("wc");
if (!SDKHelper.ReadUntil(xmlReader, "code"))
{
throw new MissingFieldException("code");
}
result.CodeId = xmlReader.ReadElementContentAsInt();
if (result.Code == HealthServiceStatusCode.Ok)
{
if (xmlReader.ReadToFollowing("wc:info"))
{
result.InfoNavigator = new XPathDocument(xmlReader).CreateNavigator();
result.InfoNavigator.MoveToFirstChild();
}
return(result);
}
result.Error = HandleErrorResponse(xmlReader);
HealthServiceException healthServiceException =
HealthServiceExceptionHelper.GetHealthServiceException(result);
throw healthServiceException;
}
}
}
