#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.Collections;
using System.Data;
using IBatisNet.Common.Utilities.Objects;
using IBatisNet.DataMapper.Commands;
using IBatisNet.DataMapper.Configuration.ResultMapping;
using IBatisNet.DataMapper.Scope;
namespace IBatisNet.DataMapper.MappedStatements.ArgumentStrategy{
/// <summary>
/// <see cref="IArgumentStrategy"/> implementation when a 'select' attribute exists
/// on a <see cref="IList"/> <see cref="ArgumentProperty"/>
/// </summary>
public sealed class SelectListStrategy : 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)
{
// Get the select statement
IMappedStatement selectStatement = request.MappedStatement.SqlMap.GetMappedStatement(mapping.Select);
if (mapping.MemberType == typeof(IList))
{
reader = DataReaderTransformer.Transform(reader, request.Session.DataSource.DbProvider);
return selectStatement.ExecuteQueryForList(request.Session, keys);
}
else // Strongly typed List
{
reader = DataReaderTransformer.Transform(reader, request.Session.DataSource.DbProvider);
IFactory factory = request.DataExchangeFactory.ObjectFactory.CreateFactory(mapping.MemberType, Type.EmptyTypes);
object values = factory.CreateInstance(null);
selectStatement.ExecuteQueryForList(request.Session, keys, (IList)values);
return values;
}
}
#endregion
}
}
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