/// <summary>
/// Constructor
/// </summary>
/// <param name="queryData">Query data</param>
/// <param name="filedsMap">The mapped set of Context model fields and Google Analytics fields</param>
/// <param name="expression">Delegate which will be invoked to create the instance of the Result object</param>
internal SelectedDataContext(QueryData queryData, FieldsMap filedsMap, Func <ContextDataModel, T> expression)
{
_expression = expression;
_fieldsMap = filedsMap;
_queryData = queryData;
}
public void ExecuteAsync(QueryData queryData, Func <ContextDataModel, T> expression, FieldsMap fieldsMap, Action <IEnumerable <T> > callback)
{
var request = getRequest(queryData);
request.FetchAsync(lazyData =>
{
try
{
GaData data = lazyData.GetResult();
callback(getResult(data, expression, fieldsMap));
}
catch (Exception ex)
{
var requestExceprion = new GoogleAnalyticsRequestException("Can't fetch data", ex);
throw requestExceprion;
}
});
}
private IEnumerable <T> getResult(GaData data, Func <ContextDataModel, T> expression, FieldsMap fieldsMap)
{
var contextProperties = new Dictionary <string, PropertyInfo>();
ContextDataModel context = new ContextDataModel();
Type contextType = typeof(ContextDataModel);
if (data.Rows != null)
{
foreach (var row in data.Rows)
{
for (int i = 0; i < data.ColumnHeaders.Count; i++)
{
string fieldName = data.ColumnHeaders[i].Name;
var item = fieldsMap.FindByContextModelFieldName(fieldName);
MemberInfo member = item.ContextModelMember;
if (item.IsProperty)
{
PropertyInfo propertyInfo = member as PropertyInfo;
DataType dataType = propertyInfo.GetDataTypeOfMember();
BaseField field = (BaseField)Activator.CreateInstance(propertyInfo.PropertyType);
string fieldValue = row[i];
field.SetValue(fieldValue);
propertyInfo.SetValue(context, field, null);
}
else if (item.IsMethod)
{
MethodInfo methodInfo = member as MethodInfo;
MethodInfo setter = contextType.GetMethod("addTofieldsForMethodStorage", BindingFlags.NonPublic | BindingFlags.Instance);
BaseField field = (BaseField)Activator.CreateInstance(methodInfo.ReturnType);
setter.Invoke(context, new object[] { fieldName, field });
}
}
T res = expression(context);
yield return(res);
}
}
}
public IEnumerable <T> Execute(QueryData queryData, Func <ContextDataModel, T> expression, FieldsMap fieldsMap)
{
var request = getRequest(queryData);
try
{
GaData data = request.Fetch();
return(getResult(data, expression, fieldsMap));
}
catch (Exception ex)
{
var requestExceprion = new GoogleAnalyticsRequestException("Can't fetch data", ex);
throw requestExceprion;
}
}