/// <summary>
/// Initializes a new instance of the
/// <see cref="DbDataRecordEnumerator"/> class.
/// </summary>
/// <param name="reader">The data reader instance, containing
/// the result set.</param>
/// <param name="lookup">The column name lookup dictionary.</param>
public DbDataRecordEnumerator(IDbDataReader reader,
DbFieldLookup lookup)
{
Precondition.Require(reader, () => Error.ArgumentNull("reader"));
Precondition.Require(lookup, () => Error.ArgumentNull("lookup"));
_reader = reader;
_lookup = lookup;
_enumerator = new DbEnumerator(_reader, false);
}
/// <summary>
/// Initializes a new instance
/// of the <see cref="DbDataRecord"/> class.
/// </summary>
/// <param name="record">An <see cref="IDataRecord"/>
/// instance, which will be used to fill the value set.</param>
internal DbDataRecord(IDataRecord record, DbFieldLookup lookup)
{
Precondition.Require(record, () => Error.ArgumentNull("record"));
Precondition.Require(lookup, () => Error.ArgumentNull("lookup"));
_dataRecord = record;
_lookup = lookup;
_accessedKeys = new HashSet <string>(
StringComparer.InvariantCultureIgnoreCase);
}
private static DbFieldLookup CreateLookupTable(IDataRecord record)
{
DbFieldLookup lookup = new DbFieldLookup();
for (int i = 0; i < record.FieldCount; ++i)
{
lookup.Add(i, record.GetName(i));
}
return(lookup);
}
private static ICollection <DbQueryResultRow> CreateResultSet(IDataReader reader)
{
List <DbQueryResultRow> rows = new List <DbQueryResultRow>();
if (reader.Read())
{
DbFieldLookup lookup = CreateLookupTable(reader);
do
{
rows.Add(new DbQueryResultRow(lookup, reader));
}while (reader.Read());
}
return(rows);
}
/// <summary>
/// Initializes a new instance of the
/// <see cref="Radischevo.Wahha.Data.DbQueryResultRow"/> class.
/// </summary>
/// <param name="lookup">The result field lookup helper.</param>
/// <param name="record">The data record to extract values from.</param>
public DbQueryResultRow(DbFieldLookup lookup, IDataRecord record)
: base()
{
Precondition.Require(lookup, () => Error.ArgumentNull("lookup"));
Precondition.Require(record, () => Error.ArgumentNull("record"));
int fieldCount = record.FieldCount;
_lookup = lookup;
_values = new object[fieldCount];
_dataTypes = new string[fieldCount];
_accessedKeys = new HashSet <string>();
record.GetValues(_values);
for (int i = 0; i < fieldCount; ++i)
{
_dataTypes[i] = record.GetDataTypeName(i);
}
}