/// <summary>
/// Checks that the given POCO type is valid and doesn't contain repeated column names
/// </summary>
public static void ValidatePocoType <A>()
{
var colNames = ReportParserUtils.GetColumnNamesFromPocoType <A>();
var uniqueNames = colNames.ToDictionary(name => name);
if (colNames.Count() != uniqueNames.Count())
{
throw new System.ArgumentException("The given row type contains duplicate column names.");
}
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="reader">Provides the text of the report.</param>
/// <param name="reportName">An arbitrary name given to this report.</param>
/// <param name="onError">A callback action that is used when there is
/// an error in parsing an attribute from the report.</param>
public AwReport(InputTextReader reader, string reportName,
Action <ColumnValuePair, A> onError)
{
if (reader == null)
{
throw new ArgumentNullException("The input text reader cannot be null.");
}
ReportParserUtils.ValidatePocoType <A>();
this.ReportName = reportName;
this.reader = reader;
this.OnError = onError;
ReportParserUtils.GetColumnNamesFromPocoType <A>()
.ToList().ForEach(name => colNames.Add(name));
}
/// <summary>
/// Parses the current row from the input reader.
/// </summary>
/// <returns>The row that was just parsed</returns>
/// <exception cref="AdWordsReportsException">
/// Throws an error if the current row could not be parsed because the reader has ended
/// or there is invalid input.
/// </exception>
private A ParseCurrentRow()
{
var record = new A();
var foundColumns = new HashSet <string>();
IEnumerable <ColumnValuePair> rowData = reader.GetAttributes();
foreach (ColumnValuePair attribute in rowData)
{
if (colNames.Contains(attribute.ColName))
{
foundColumns.Add(attribute.ColName);
ReportParserUtils.SetColumnValue <A>(attribute, record, OnError);
}
}
if (foundColumns.Count == 0 && colNames.Count != 0)
{
throw new AdWordsReportsException("None of the required columns "
+ "were found. The stream might not have any of the required columns "
+ "or moveNextRow() was not called before requesting the first row.");
}
return(record);
}
