#region Apache Notice
/*****************************************************************************
* $Revision: 374175 $
* $LastChangedDate: 2006-04-25 19:40:27 +0200 (mar., 25 avr. 2006) $
* $LastChangedBy: gbayon $
*
* iBATIS.NET Data Mapper
* Copyright (C) 2006/2005 - The Apache Software Foundation
*
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
********************************************************************************/
#endregion
using System;
using System.Data;
using IBatisNet.DataMapper.Configuration.ResultMapping;
using IBatisNet.DataMapper.Scope;
using IBatisNet.DataMapper.TypeHandlers;
namespace IBatisNet.DataMapper.MappedStatements.ArgumentStrategy{
/// <summary>
/// <see cref="IArgumentStrategy"/> implementation when no 'select' or
/// 'resultMapping' attribute exists on a <see cref="ResultProperty"/>.
/// </summary>
public sealed class DefaultStrategy : IArgumentStrategy
{
#region IArgumentStrategy Members
/// <summary>
/// Gets the value of an argument constructor.
/// </summary>
/// <param name="request">The current <see cref="RequestScope"/>.</param>
/// <param name="mapping">The <see cref="ResultProperty"/> with the argument infos.</param>
/// <param name="reader">The current <see cref="IDataReader"/>.</param>
/// <param name="keys">The keys</param>
/// <returns>The paremeter value.</returns>
public object GetValue(RequestScope request, ResultProperty mapping,
ref IDataReader reader, object keys)
{
if (mapping.TypeHandler == null ||
mapping.TypeHandler is UnknownTypeHandler) // Find the TypeHandler
{
lock(mapping)
{
if (mapping.TypeHandler == null || mapping.TypeHandler is UnknownTypeHandler)
{
int columnIndex = 0;
if (mapping.ColumnIndex == ResultProperty.UNKNOWN_COLUMN_INDEX)
{
columnIndex = reader.GetOrdinal(mapping.ColumnName);
}
else
{
columnIndex = mapping.ColumnIndex;
}
Type systemType =((IDataRecord)reader).GetFieldType(columnIndex);
mapping.TypeHandler = request.DataExchangeFactory.TypeHandlerFactory.GetTypeHandler(systemType);
}
}
}
object dataBaseValue = mapping.GetDataBaseValue( reader );
request.IsRowDataFound = request.IsRowDataFound || (dataBaseValue != null);
return dataBaseValue;
}
#endregion
}
}
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