/// <summary>
/// Execute a command against a data source, mapping the data reader GetSchemaTable() result to an enumerable of resultsets, each with an enumerable of records dictionaries.
/// This method perfoms LAZY LOADING/DEFERRED EXECUTION.
/// </summary>
/// <param name="dataReader"> The target data reader. </param>
/// <returns> An enumerable of resultset instances, each containing an enumerable of dictionaries with record key/value pairs of schema metadata. </returns>
public IEnumerable <IResultset> GetSchemaResultsetsFromReader(IDataReader dataReader)
{
int resultsetIndex = 0;
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): enter", typeof(AdoNetYieldingFascade).Name));
if ((object)dataReader == null)
{
throw new ArgumentNullException("dataReader");
}
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): before yield", typeof(AdoNetYieldingFascade).Name));
using (dataReader)
{
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): use reader", typeof(AdoNetYieldingFascade).Name));
do
{
Resultset resultset = new Resultset(resultsetIndex++); // prevent modified closure
resultset.Records = this.GetSchemaRecordsFromReader(dataReader, (ra) => resultset.RecordsAffected = ra);
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): on yield", typeof(AdoNetYieldingFascade).Name));
yield return(resultset); // LAZY PROCESSING INTENT HERE / DO NOT FORCE EAGER LOAD
}while (dataReader.NextResult());
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): dispose reader", typeof(AdoNetYieldingFascade).Name));
}
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): after yield", typeof(AdoNetYieldingFascade).Name));
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): leave", typeof(AdoNetYieldingFascade).Name));
}
/// <summary>
/// Execute a command against a data source, mapping the data reader GetSchemaTable() result to an enumerable of resultsets, each with an enumerable of records dictionaries.
/// This method perfoms LAZY LOADING/DEFERRED EXECUTION.
/// </summary>
/// <param name="dataReader"> The target data reader. </param>
/// <returns> An enumerable of resultset instances, each containing an enumerable of dictionaries with record key/value pairs of schema metadata. </returns>
public IEnumerable<IResultset> GetSchemaResultsetsFromReader(IDataReader dataReader)
{
int resultsetIndex = 0;
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): enter", typeof(AdoNetYieldingFascade).Name));
if ((object)dataReader == null)
throw new ArgumentNullException("dataReader");
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): before yield", typeof(AdoNetYieldingFascade).Name));
using (dataReader)
{
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): use reader", typeof(AdoNetYieldingFascade).Name));
do
{
Resultset resultset = new Resultset(resultsetIndex++); // prevent modified closure
resultset.Records = this.GetSchemaRecordsFromReader(dataReader, (ra) => resultset.RecordsAffected = ra);
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): on yield", typeof(AdoNetYieldingFascade).Name));
yield return resultset; // LAZY PROCESSING INTENT HERE / DO NOT FORCE EAGER LOAD
}
while (dataReader.NextResult());
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): dispose reader", typeof(AdoNetYieldingFascade).Name));
}
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): after yield", typeof(AdoNetYieldingFascade).Name));
OnlyWhen._PROFILE_ThenPrint(string.Format("{0}::GetSchemaResultsetsFromReader(...): leave", typeof(AdoNetYieldingFascade).Name));
}
