AspectSharp/AspectSharp.Lang/Steps/Types/PruneTypesStep.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 AspectSharp.Lang.Steps.Types
  16 {
  17         using System;
  18
  19         using AopAlliance.Intercept;
  20
  21         using AspectSharp.Lang.AST;
  22
  23         /// <summary>
  24         /// Summary description for PruneTypesStep.
  25         /// </summary>
  26         public class PruneTypesStep : AbstractVisitorStep
  27         {
  28                 private static readonly String MIXIN_CANT_BE_INTERFACE = "The specified type for a mixin is an interface which is invalid";
  29                 private static readonly String INVALID_INTERCEPTOR = "The specified type for an interceptor doesn't implement the interceptor interface";
  30
  31                 public override void Process(Context context, EngineConfiguration conf)
  32                 {
  33                         Init(context);
  34                         Visit(conf);
  35
  36                         if (!context.HasErrors)
  37                         {
  38                                 base.Process(context, conf);
  39                         }
  40                 }
  41
  42                 #region AbstractVisitorStep overrides
  43
  44                 public override void OnTargetTypeDefinition(TargetTypeDefinition targetType)
  45                 {
  46                         if (targetType.TargetStrategy == TargetStrategyEnum.SingleType)
  47                         {
  48                                 AssertNotInterface(
  49                                         targetType.LexicalInfo, targetType.SingleType.ResolvedType,
  50                                         MIXIN_CANT_BE_INTERFACE);
  51                         }
  52                         else if (targetType.TargetStrategy == TargetStrategyEnum.Namespace)
  53                         {
  54                         }
  55                         else if (targetType.TargetStrategy == TargetStrategyEnum.Assignable)
  56                         {
  57                         }
  58                         else if (targetType.TargetStrategy == TargetStrategyEnum.Custom)
  59                         {
  60                                 // TODO: Move IClassMatcher and etc to another assembly
  61                                 // to prevent cyclic references.
  62 //                              AssertAssignableFrom(
  63 //                                      targetType.LexicalInfo, typeof(IClassMatcher),
  64 //                                      targetType.SingleType.ResolvedType, MIXIN_CANT_BE_INTERFACE);
  65                         }
  66                 }
  67
  68                 public override void OnMixinDefinition(MixinDefinition mixin)
  69                 {
  70                         AssertNotInterface(mixin.LexicalInfo, mixin.TypeReference.ResolvedType, MIXIN_CANT_BE_INTERFACE);
  71                 }
  72
  73                 public override void OnInterceptorDefinition(InterceptorDefinition interceptor)
  74                 {
  75                         AssertIsInterceptor(interceptor.LexicalInfo, interceptor.TypeReference.ResolvedType, INVALID_INTERCEPTOR);
  76                 }
  77
  78                 public override void OnMixinEntryDefinition(MixinEntryDefinition mixin)
  79                 {
  80                         AssertNotInterface(mixin.LexicalInfo, mixin.TypeReference.ResolvedType, MIXIN_CANT_BE_INTERFACE);
  81                 }
  82
  83                 public override void OnInterceptorEntryDefinition(InterceptorEntryDefinition interceptor)
  84                 {
  85                         AssertIsInterceptor(interceptor.LexicalInfo, interceptor.TypeReference.ResolvedType, INVALID_INTERCEPTOR);
  86                 }
  87
  88                 #endregion
  89
  90                 private void AssertNotInterface(LexicalInfo info, Type type, String message)
  91                 {
  92                         if (type.IsInterface)
  93                         {
  94                                 Context.RaiseErrorEvent(info, message);
  95                         }
  96                 }
  97
  98                 private void AssertIsInterceptor(LexicalInfo info, Type type, String message)
  99                 {
 100                         if (!typeof (IInterceptor).IsAssignableFrom(type))
 101                         {
 102                                 Context.RaiseErrorEvent(info, message);
 103                         }
 104                 }
 105         }
 106 }