#region License
/*
* Copyright 2002-2008 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 the base method.
/// </summary>
/// <author>Bruno Baia</author>
public class BaseAopProxyMethodBuilder : AbstractAopProxyMethodBuilder
{
#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">
/// The dictionary to cache the list of target
/// <see cref="System.Reflection.MethodInfo"/>s.
/// </param>
/// <param name="onProxyTargetMethods">
/// The dictionary to cache the list of target
/// <see cref="System.Reflection.MethodInfo"/>s defined on the proxy.
/// </param>
public BaseAopProxyMethodBuilder(
TypeBuilder typeBuilder, IAopProxyTypeGenerator aopProxyGenerator,
IDictionary targetMethods, IDictionary onProxyTargetMethods)
: base(typeBuilder, aopProxyGenerator, false, targetMethods, onProxyTargetMethods)
{
}
#endregion
#region Protected Methods
/// <summary>
/// Create static field that will cache target method when defined on the proxy.
/// </summary>
/// <param name="il">The IL generator to use.</param>
/// <param name="method">The target method.</param>
protected override void GenerateOnProxyTargetMethodCacheField(
ILGenerator il, MethodInfo method)
{
if (method.IsVirtual && !method.IsFinal)
{
// generate proxy method
MethodBuilder baseMethod = typeBuilder.DefineMethod("proxy_" + method.Name,
MethodAttributes.Public | MethodAttributes.HideBySig,
CallingConventions.Standard,
method.ReturnType, ReflectionUtils.GetParameterTypes(method));
#if NET_2_0
DefineGenericParameters(baseMethod, method);
#endif
DefineParameters(baseMethod, method);
ILGenerator localIL = baseMethod.GetILGenerator();
localIL.Emit(OpCodes.Ldarg_0);
// setup parameters for call
for (int i = 0; i < method.GetParameters().Length; i++)
{
localIL.Emit(OpCodes.Ldarg_S, i + 1);
}
localIL.EmitCall(OpCodes.Call, method, null);
localIL.Emit(OpCodes.Ret);
// create static field that will cache proxy method
string methodId = GenerateMethodCacheFieldId(method);
onProxyTargetMethods.Add(methodId, method);
onProxyTargetMethodCacheField = typeBuilder.DefineField(
methodId, typeof(MethodInfo), FieldAttributes.Private | FieldAttributes.Static | FieldAttributes.InitOnly);
#if NET_2_0
MakeGenericMethod(il, method, onProxyTargetMethodCacheField, genericOnProxyTargetMethod);
#endif
}
}
/// <summary>
/// Calls target 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)
{
CallDirectBaseMethod(il, method);
}
#endregion
}
}
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