Tools/DynamicProxy/Castle.DynamicProxy/Builder/CodeBuilder/EasyEvent.cs

   1 // Copyright 2004-2007 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.Builder.CodeBuilder
  16 {
  17         using System;
  18         using System.Reflection;
  19         using System.Reflection.Emit;
  20
  21         using Castle.DynamicProxy.Builder.CodeBuilder.SimpleAST;
  22         using Castle.DynamicProxy.Builder.CodeBuilder.Utils;
  23
  24         /// <summary>
  25         /// Summary description for EasyEvent.
  26         /// </summary>
  27         [CLSCompliant(false)]
  28         public class EasyEvent : IEasyMember
  29         {
  30                 private EventBuilder m_builder;
  31                 private AbstractEasyType m_maintype;
  32                 private EasyMethod m_addOnMethod;
  33                 private EasyMethod m_removeOnMethod;
  34                 private string m_name;
  35
  36                 public EasyEvent(AbstractEasyType maintype, String name, Type eventHandlerType)
  37                 {
  38                         m_name = name;
  39                         m_maintype = maintype;
  40                         m_builder = maintype.TypeBuilder.DefineEvent(
  41                                 name, EventAttributes.None, eventHandlerType);
  42                 }
  43
  44                 public String Name
  45                 {
  46                         get { return m_name; }
  47                 }
  48
  49                 public EasyMethod CreateAddOnMethod(MethodAttributes atts, params Type[] parameters)
  50                 {
  51                         if (m_addOnMethod == null)
  52                         {
  53                                 m_addOnMethod =
  54                                         new EasyMethod(m_maintype, "add_" + Name, atts, new ReturnReferenceExpression(typeof(void)), ArgumentsUtil.ConvertToArgumentReference(parameters));
  55                         }
  56
  57                         return m_addOnMethod;
  58                 }
  59
  60                 public EasyMethod CreateRemoveOnMethod(MethodAttributes atts, params Type[] parameters)
  61                 {
  62                         if (m_removeOnMethod == null)
  63                         {
  64                                 m_removeOnMethod =
  65                                         new EasyMethod(m_maintype, "remove_" + Name, atts, new ReturnReferenceExpression(typeof(void)), ArgumentsUtil.ConvertToArgumentReference(parameters));
  66                         }
  67
  68                         return m_removeOnMethod;
  69                 }
  70
  71                 #region IEasyMember Members
  72
  73                 public void Generate()
  74                 {
  75                         if (m_addOnMethod != null)
  76                         {
  77                                 m_addOnMethod.Generate();
  78                                 m_builder.SetAddOnMethod(m_addOnMethod.MethodBuilder);
  79                         }
  80
  81                         if (m_removeOnMethod != null)
  82                         {
  83                                 m_removeOnMethod.Generate();
  84                                 m_builder.SetRemoveOnMethod(m_removeOnMethod.MethodBuilder);
  85                         }
  86                 }
  87
  88                 public void EnsureValidCodeBlock()
  89                 {
  90                         if (m_addOnMethod != null)
  91                         {
  92                                 m_addOnMethod.EnsureValidCodeBlock();
  93                         }
  94
  95                         if (m_removeOnMethod != null)
  96                         {
  97                                 m_removeOnMethod.EnsureValidCodeBlock();
  98                         }
  99                 }
 100
 101                 public MethodBase Member
 102                 {
 103                         get { return null; }
 104                 }
 105
 106                 public Type ReturnType
 107                 {
 108                         get { throw new Exception("TBD"); }
 109                 }
 110
 111                 #endregion
 112         }
 113 }