Tools/DynamicProxy/Castle.DynamicProxy/Invocation/AbstractInvocation.cs

   1 // Copyright 2004-2008 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.DynamicProxy.Invocation
  16 {
  17         using System;
  18         using System.Reflection;
  19
  20         public abstract class AbstractInvocation : MarshalByRefObject, IInvocation
  21         {
  22                 protected ICallable callable;
  23                 private MethodInfo method;
  24                 private object proxy;
  25                 private object target;
  26                 protected object changed_target;
  27
  28                 public AbstractInvocation( ICallable callable, object proxy, MethodInfo method, object newtarget )
  29                 {
  30                         this.callable = callable;
  31                         this.proxy = proxy;
  32
  33                         this.target = callable.Target;
  34
  35                         if (newtarget != null)
  36                         {
  37                                 this.target = newtarget;
  38                         }
  39
  40                         this.method = method;
  41                 }
  42
  43                 public object Proxy
  44                 {
  45                         get { return proxy; }
  46                 }
  47
  48                 public object InvocationTarget
  49                 {
  50                         get { return changed_target != null ? changed_target : target; }
  51                         set { changed_target = value; }
  52                 }
  53
  54                 public MethodInfo Method
  55                 {
  56                         get { return method; }
  57                 }
  58
  59                 public MethodInfo MethodInvocationTarget
  60                 {
  61                         get { return Method; }
  62                 }
  63
  64                 public virtual object Proceed(params object[] args)
  65                 {
  66                         // If the user changed the target, we use reflection
  67                         // otherwise the delegate will be used.
  68                         if (changed_target == null)
  69                         {
  70                                 return callable.Call( args );
  71                         }
  72                         else
  73                         {
  74                                 return Method.Invoke( changed_target, args );
  75                         }
  76                 }
  77         }
  78 }