InversionOfControl/Castle.MicroKernel/Registration/Interceptor/InterceptorDescriptor.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.MicroKernel.Registration.Interceptor
  16 {
  17         using System;
  18         using Castle.Core;
  19
  20         public class InterceptorDescriptor<S> : ComponentDescriptor<S>
  21         {
  22                 private readonly Where where;
  23                 private readonly int insertIndex;
  24                 private readonly InterceptorReference[] interceptors;
  25
  26                 public enum Where
  27                 {
  28                         First,
  29                         Last,
  30                         Insert,
  31                         Default
  32                 }
  33
  34                 public InterceptorDescriptor(InterceptorReference[] interceptors, Where where)
  35                 {
  36                         this.interceptors = interceptors;
  37                         this.where = where;
  38                 }
  39
  40                 public InterceptorDescriptor(InterceptorReference[] interceptors, int insertIndex)
  41                         : this(interceptors, Where.Insert)
  42                 {
  43                         if (insertIndex < 0)
  44                         {
  45                                 throw new ArgumentOutOfRangeException("insertIndex", "insertIndex must be >= 0");
  46                         }
  47
  48                         this.insertIndex = insertIndex;
  49                 }
  50
  51                 public InterceptorDescriptor(InterceptorReference[] interceptors)
  52                 {
  53                         where = Where.Default;
  54                         this.interceptors = interceptors;
  55                 }
  56
  57                 protected internal override void ApplyToModel(IKernel kernel, ComponentModel model)
  58                 {
  59                         foreach(InterceptorReference interceptor in interceptors)
  60                         {
  61                                 switch (where)
  62                                 {
  63                                         case Where.First:
  64                                                 model.Interceptors.AddFirst(interceptor);
  65                                                 break;
  66
  67                                         case Where.Last:
  68                                                 model.Interceptors.AddLast(interceptor);
  69                                                 break;
  70
  71                                         case Where.Insert:
  72                                                 model.Interceptors.Insert(insertIndex, interceptor);
  73                                                 break;
  74
  75                                         default:
  76                                                 model.Interceptors.Add(interceptor);
  77                                                 break;
  78                                 }
  79
  80                                 AddDependencyModel(interceptor, model);
  81                         }
  82                 }
  83
  84                 private static void AddDependencyModel(InterceptorReference interceptor, ComponentModel model)
  85                 {
  86                         DependencyModel dependency = new DependencyModel(
  87                                 DependencyType.Service, interceptor.ComponentKey,
  88                                 interceptor.ServiceType, false);
  89                         model.Dependencies.Add(dependency);
  90                 }
  91         }
  92 }