#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.Collections.Generic;
using System.Data;
using System.Reflection;
using IBatisNet.Common;
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 an <see cref="ArgumentProperty"/> and the object property is
/// different from an <see cref="Array"/> or an <see cref="IList"/>.
/// </summary>
public sealed class SelectGenericListStrategy : 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);
reader = DataReaderTransformer.Transform(reader, request.Session.DataSource.DbProvider);
Type[] typeArgs = mapping.MemberType.GetGenericArguments();
Type genericList = typeof(IList<>);
Type constructedType = genericList.MakeGenericType(typeArgs);
Type elementType = mapping.MemberType.GetGenericArguments()[0];
Type mappedStatementType = selectStatement.GetType();
Type[] typeArguments = { typeof(SqlMapSession), typeof(object) };
MethodInfo[] mis = mappedStatementType.GetMethods(BindingFlags.InvokeMethod | BindingFlags.Public | BindingFlags.Instance);
MethodInfo mi = null;
foreach (MethodInfo m in mis)
{
if (m.IsGenericMethod &&
m.Name == "ExecuteQueryForList" &&
m.GetParameters().Length == 2)
{
mi = m;
break;
}
}
MethodInfo miConstructed = mi.MakeGenericMethod(elementType);
// Invoke the method.
object[] args = { request.Session, keys };
object values = miConstructed.Invoke(selectStatement, args);
return values;
}
#endregion
}
}
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