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//
// System.Data.SqlClient.DbEnumerator.cs
//
// Author:
// Tim Coleman (tim@timcoleman.com)
//
// Copyright (C) Tim Coleman, 2002
//
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
namespace System.Data.Common {
public class DbEnumerator : IEnumerator
{
#region Fields
IDataReader reader;
bool closeReader;
SchemaInfo[] schema;
FieldNameLookup lookup;
int fieldCount;
#endregion // Fields
#region Constructors
public DbEnumerator (IDataReader reader)
: this (reader, false)
{
}
public DbEnumerator (IDataReader reader, bool closeReader)
{
this.reader = reader;
this.closeReader = closeReader;
this.lookup = new FieldNameLookup ();
this.fieldCount = reader.FieldCount;
LoadSchema ();
}
#endregion // Constructors
#region Properties
public object Current {
get {
object[] values = new object[fieldCount];
reader.GetValues (values);
return new DbDataRecord (schema, values, lookup);
}
}
#endregion // Properties
#region Methods
private void LoadSchema ()
{
schema = new SchemaInfo [fieldCount];
for(int i=0; i < fieldCount; i++) {
SchemaInfo columnSchema = new SchemaInfo ();
lookup.Add (reader.GetName(i));
columnSchema.ColumnName = reader.GetName(i);
columnSchema.ColumnOrdinal = i;
columnSchema.DataTypeName = reader.GetDataTypeName (i);
columnSchema.FieldType = reader.GetFieldType (i);
schema [i] = columnSchema;
}
}
public bool MoveNext ()
{
if (reader.Read ())
return true;
if (closeReader)
reader.Close ();
return false;
}
[EditorBrowsable (EditorBrowsableState.Never)]
public void Reset ()
{
throw new NotSupportedException ();
}
#endregion // Methods
}
}
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