#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.Generic;
using System.Reflection;
using IBatisNet.Common;
using IBatisNet.DataMapper.Scope;
namespace IBatisNet.DataMapper.MappedStatements.PostSelectStrategy{
/// <summary>
/// <see cref="IPostSelectStrategy"/> implementation to exceute a query generic list.
/// </summary>
public sealed class GenericListStrategy : IPostSelectStrategy
{
#region IPostSelectStrategy Members
/// <summary>
/// Executes the specified <see cref="PostBindind"/>.
/// </summary>
/// <param name="postSelect">The <see cref="PostBindind"/>.</param>
/// <param name="request">The <see cref="RequestScope"/></param>
public void Execute(PostBindind postSelect, RequestScope request)
{
// How to: Examine and Instantiate Generic Types with Reflection
// http://msdn2.microsoft.com/en-us/library/b8ytshk6.aspx
Type[] typeArgs = postSelect.ResultProperty.SetAccessor.MemberType.GetGenericArguments();
Type genericList = typeof(IList<>);
Type constructedType = genericList.MakeGenericType(typeArgs);
Type elementType = postSelect.ResultProperty.SetAccessor.MemberType.GetGenericArguments()[0];
Type mappedStatementType = postSelect.Statement.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, postSelect.Keys };
object values = miConstructed.Invoke(postSelect.Statement, args);
postSelect.ResultProperty.SetAccessor.Set(postSelect.Target, values);
}
#endregion
}
}
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