Tools/Castle.DynamicProxy2/Castle.DynamicProxy/DefaultProxyBuilder.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
  16 {
  17         using System;
  18         using System.Collections;
  19         using Castle.DynamicProxy.Generators;
  20
  21         public class DefaultProxyBuilder : IProxyBuilder
  22         {
  23                 private readonly ModuleScope scope;
  24
  25                 public DefaultProxyBuilder() : this(new ModuleScope())
  26                 {
  27                 }
  28
  29                 public DefaultProxyBuilder(ModuleScope scope)
  30                 {
  31                         this.scope = scope;
  32                 }
  33
  34                 public ModuleScope ModuleScope
  35                 {
  36                         get { return scope; }
  37                 }
  38
  39                 public virtual Type CreateClassProxy(Type theClass, ProxyGenerationOptions options)
  40                 {
  41                         AssertValidType(theClass);
  42
  43                         ClassProxyGenerator generator = new ClassProxyGenerator(scope, theClass);
  44
  45                         return generator.GenerateCode(null, options);
  46                 }
  47
  48                 public Type CreateClassProxy(Type theClass, Type[] interfaces, ProxyGenerationOptions options)
  49                 {
  50                         AssertValidType(theClass);
  51                         AssertValidTypes(interfaces);
  52
  53                         ClassProxyGenerator generator = new ClassProxyGenerator(scope, theClass);
  54
  55                         return generator.GenerateCode(interfaces, options);
  56                 }
  57
  58                 public Type CreateInterfaceProxyTypeWithoutTarget(Type theInterface, Type[] interfaces, ProxyGenerationOptions options)
  59                 {
  60                         AssertValidType(theInterface);
  61                         AssertValidTypes(interfaces);
  62
  63                         InterfaceProxyWithoutTargetGenerator generatorWithoutTarget =
  64                                 new InterfaceProxyWithoutTargetGenerator(scope, theInterface);
  65
  66                         return generatorWithoutTarget.GenerateCode(typeof(object), interfaces, options);
  67                 }
  68
  69                 public Type CreateInterfaceProxyTypeWithTarget(Type theInterface, Type[] interfaces, Type targetType,
  70                                                                ProxyGenerationOptions options)
  71                 {
  72                         AssertValidType(theInterface);
  73                         AssertValidTypes(interfaces);
  74
  75                         InterfaceProxyWithTargetGenerator generator = new InterfaceProxyWithTargetGenerator(scope, theInterface);
  76
  77                         return generator.GenerateCode(targetType, interfaces, options);
  78                 }
  79
  80                 public Type CreateInterfaceProxyTypeWithTargetInterface(Type theInterface, ProxyGenerationOptions options)
  81                 {
  82                         AssertValidType(theInterface);
  83
  84                         InterfaceProxyWithTargetInterfaceGenerator generator =
  85                                 new InterfaceProxyWithTargetInterfaceGenerator(scope, theInterface);
  86
  87                         return generator.GenerateCode(theInterface, null, options);
  88                 }
  89
  90                 private void AssertValidType(Type target)
  91                 {
  92                         bool isNestedAndInternal = target.IsNested && (target.IsNestedAssembly || target.IsNestedFamORAssem);
  93                         bool isInternalNotNested = target.IsVisible == false && target.IsNested == false;
  94                         bool internalAndVisibleToDynProxy = (isInternalNotNested || isNestedAndInternal) &&
  95                                                             InternalsHelper.IsInternalToDynamicProxy(target.Assembly);
  96                         if (!target.IsPublic && !target.IsNestedPublic && !internalAndVisibleToDynProxy)
  97                         {
  98                                 throw new GeneratorException("Type is not public, so a proxy cannot be generated. Type: " + target.FullName);
  99                         }
 100                         if (target.IsGenericTypeDefinition)
 101                         {
 102                                 throw new GeneratorException ("Type is a generic tyspe definition, so a proxy cannot be generated. Type: " + target.FullName);
 103                         }
 104                 }
 105
 106                 private void AssertValidTypes(IEnumerable targetTypes)
 107                 {
 108                         if (targetTypes != null)
 109                         {
 110                                 foreach(Type t in targetTypes)
 111                                 {
 112                                         AssertValidType(t);
 113                                 }
 114                         }
 115                 }
 116         }
 117 }