#region License
/*
* Copyright 2002-2006 the original author or authors.
*
* 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
#region Imports
using System;
using System.Collections;
using System.Reflection;
using System.Reflection.Emit;
using Spring.Util;
#endregion
namespace Spring.Aop.Framework.DynamicProxy{
/// <summary>
/// <see cref="Spring.Proxy.IProxyMethodBuilder"/> implementation
/// that delegates method calls to introduction object.
/// </summary>
/// <author>Aleksandar Seovic</author>
/// <author>Bruno Baia</author>
public class IntroductionProxyMethodBuilder : AbstractAopProxyMethodBuilder
{
#region Fields
/// <summary>
/// The index of the introduction to delegate call to.
/// </summary>
protected int index;
#endregion
#region Constructor(s) / Destructor
/// <summary>
/// Creates a new instance of the method builder.
/// </summary>
/// <param name="typeBuilder">The type builder to use.</param>
/// <param name="aopProxyGenerator">
/// The <see cref="IAopProxyTypeGenerator"/> implementation to use.
/// </param>
/// <param name="targetMethods">
///
/// </param>
/// <param name="index">index of the introduction to delegate call to</param>
public IntroductionProxyMethodBuilder(
TypeBuilder typeBuilder, IAopProxyTypeGenerator aopProxyGenerator,
IDictionary targetMethods, int index)
: base(typeBuilder, aopProxyGenerator, true, targetMethods)
{
this.index = index;
}
#endregion
#region Protected Methods
/// <summary>
/// Generates the IL instructions that pushes
/// the introduction type on stack.
/// </summary>
/// <param name="il">The IL generator to use.</param>
protected override void PushTargetType(ILGenerator il)
{
PushTarget(il);
il.EmitCall(OpCodes.Call, References.GetTypeMethod, null);
}
/// <summary>
/// Generates the IL instructions that pushes
/// the introduction instance on stack.
/// </summary>
/// <param name="il">The IL generator to use.</param>
protected override void PushTarget(ILGenerator il)
{
PushAdvisedProxy(il);
il.Emit(OpCodes.Ldfld, References.IntroductionsField);
il.Emit(OpCodes.Ldc_I4, index);
il.Emit(OpCodes.Ldelem_Ref);
}
/// <summary>
/// Calls proxied method directly.
/// </summary>
/// <param name="il">The IL generator to use.</param>
/// <param name="method">The method to proxy.</param>
/// <param name="interfaceMethod">
/// The interface definition of the method, if applicable.
/// </param>
protected override void CallDirectProxiedMethod(
ILGenerator il, MethodInfo method, MethodInfo interfaceMethod)
{
CallDirectTargetMethod(il, interfaceMethod);
}
#endregion
}
}
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