How to use AttributeDisassembler class of Telerik.JustMock.Core.Castle.DynamicProxy.Generators package

Best JustMockLite code snippet using Telerik.JustMock.Core.Castle.DynamicProxy.Generators.AttributeDisassembler

AttributeDisassembler.cs

Source:AttributeDisassembler.cs Github

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...18 using System.Diagnostics;19 using System.Reflection;20 using System.Reflection.Emit;21 using Telerik.JustMock.Core.Castle.DynamicProxy.Internal;22 internal class AttributeDisassembler : IAttributeDisassembler23 {24 public CustomAttributeBuilder Disassemble(Attribute attribute)25 {26 var type = attribute.GetType();27 try28 {29 ConstructorInfo ctor;30 var ctorArgs = GetConstructorAndArgs(type, attribute, out ctor);31 var replicated = (Attribute)Activator.CreateInstance(type, ctorArgs);32 PropertyInfo[] properties;33 var propertyValues = GetPropertyValues(type, out properties, attribute, replicated);34 FieldInfo[] fields;35 var fieldValues = GetFieldValues(type, out fields, attribute, replicated);36 return new CustomAttributeBuilder(ctor, ctorArgs, properties, propertyValues, fields, fieldValues);37 }38 catch (Exception ex)39 {40 // there is no real way to log a warning here...41 return HandleError(type, ex);42 }43 }44 /// <summary>45 /// Handles error during disassembly process46 /// </summary>47 /// <param name = "attributeType">Type of the attribute being disassembled</param>48 /// <param name = "exception">Exception thrown during the process</param>49 /// <returns>usually null, or (re)throws the exception</returns>50 protected virtual CustomAttributeBuilder HandleError(Type attributeType, Exception exception)51 {52 // ouch...53 var message = "DynamicProxy was unable to disassemble attribute " + attributeType.Name +54 " using default AttributeDisassembler. " +55 string.Format("To handle the disassembly process properly implement the {0} interface, ",56 typeof(IAttributeDisassembler)) +57 "and register your disassembler to handle this type of attributes using " +58 typeof(AttributeUtil).Name + ".AddDisassembler<" + attributeType.Name + ">(yourDisassembler) method";59 throw new ProxyGenerationException(message, exception);60 }61 private static object[] GetConstructorAndArgs(Type attributeType, Attribute attribute, out ConstructorInfo ctor)62 {63 ctor = attributeType.GetConstructors()[0];64 var constructorParams = ctor.GetParameters();65 if (constructorParams.Length == 0)66 {67 return new object[0];68 }69 return InitializeConstructorArgs(attributeType, attribute, constructorParams);70 }71 private static object[] GetPropertyValues(Type attType, out PropertyInfo[] properties, Attribute original,72 Attribute replicated)73 {74 var propertyCandidates = GetPropertyCandidates(attType);75 var selectedValues = new List<object>(propertyCandidates.Count);76 var selectedProperties = new List<PropertyInfo>(propertyCandidates.Count);77 foreach (var property in propertyCandidates)78 {79 var originalValue = property.GetValue(original, null);80 var replicatedValue = property.GetValue(replicated, null);81 if (AreAttributeElementsEqual(originalValue, replicatedValue))82 {83 //this property has default value so we skip it84 continue;85 }86 selectedProperties.Add(property);87 selectedValues.Add(originalValue);88 }89 properties = selectedProperties.ToArray();90 return selectedValues.ToArray();91 }92 private static object[] GetFieldValues(Type attType, out FieldInfo[] fields, Attribute original, Attribute replicated)93 {94 var fieldsCandidates = attType.GetFields(BindingFlags.Public | BindingFlags.Instance);95 var selectedValues = new List<object>(fieldsCandidates.Length);96 var selectedFields = new List<FieldInfo>(fieldsCandidates.Length);97 foreach (var field in fieldsCandidates)98 {99 var originalValue = field.GetValue(original);100 var replicatedValue = field.GetValue(replicated);101 if (AreAttributeElementsEqual(originalValue, replicatedValue))102 {103 //this field has default value so we skip it104 continue;105 }106 selectedFields.Add(field);107 selectedValues.Add(originalValue);108 }109 fields = selectedFields.ToArray();110 return selectedValues.ToArray();111 }112 /// <summary>113 /// Here we try to match a constructor argument to its value.114 /// Since we can't get the values from the assembly, we use some heuristics to get it.115 /// a/ we first try to match all the properties on the attributes by name (case insensitive) to the argument116 /// b/ if we fail we try to match them by property type, with some smarts about convertions (i,e: can use Guid for string).117 /// </summary>118 private static object[] InitializeConstructorArgs(Type attributeType, Attribute attribute, ParameterInfo[] parameters)119 {120 var args = new object[parameters.Length];121 for (var i = 0; i < args.Length; i++)122 {123 args[i] = GetArgumentValue(attributeType, attribute, parameters[i]);124 }125 return args;126 }127 private static object GetArgumentValue(Type attributeType, Attribute attribute, ParameterInfo parameter)128 {129 var properties = attributeType.GetProperties();130 //first try to find a property with 131 foreach (var property in properties)132 {133 if (property.CanRead == false && property.GetIndexParameters().Length != 0)134 {135 continue;136 }137 if (String.Compare(property.Name, parameter.Name, StringComparison.CurrentCultureIgnoreCase) == 0)138 {139 return ConvertValue(property.GetValue(attribute, null), parameter.ParameterType);140 }141 }142 PropertyInfo bestMatch = null;143 //now we try to find it by type144 foreach (var property in properties)145 {146 if (property.CanRead == false && property.GetIndexParameters().Length != 0)147 {148 continue;149 }150 bestMatch = ReplaceIfBetterMatch(parameter, property, bestMatch);151 }152 if (bestMatch != null)153 {154 return ConvertValue(bestMatch.GetValue(attribute, null), parameter.ParameterType);155 }156 return GetDefaultValueFor(parameter);157 }158 /// <summary>159 /// We have the following rules here.160 /// Try to find a matching type, failing that, if the parameter is string, get the first property (under the assumption that161 /// we can convert it.162 /// </summary>163 private static PropertyInfo ReplaceIfBetterMatch(ParameterInfo parameterInfo, PropertyInfo propertyInfo,164 PropertyInfo bestMatch)165 {166 var notBestMatch = bestMatch == null || bestMatch.PropertyType != parameterInfo.ParameterType;167 if (propertyInfo.PropertyType == parameterInfo.ParameterType && notBestMatch)168 {169 return propertyInfo;170 }171 if (parameterInfo.ParameterType == typeof(string) && notBestMatch)172 {173 return propertyInfo;174 }175 return bestMatch;176 }177 /// <summary>178 /// Attributes can only accept simple types, so we return null for null,179 /// if the value is passed as string we call to string (should help with converting), 180 /// otherwise, we use the value as is (enums, integer, etc).181 /// </summary>182 private static object ConvertValue(object obj, Type paramType)183 {184 if (obj == null)185 {186 return null;187 }188 if (paramType == typeof(String))189 {190 return obj.ToString();191 }192 return obj;193 }194 private static object GetDefaultValueFor(ParameterInfo parameter)195 {196 var type = parameter.ParameterType;197 if (type == typeof(bool))198 {199 return false;200 }201 if (type.IsEnum)202 {203 return Enum.ToObject(type, 0);204 }205 if (type == typeof(char))206 {207 return Char.MinValue;208 }209 if (type.IsPrimitive)210 {211 return 0;212 }213 if(type.IsArray && parameter.IsDefined(typeof(ParamArrayAttribute), true))214 {215 return Array.CreateInstance(type.GetElementType(), 0);216 }217 return null;218 }219 private static List<PropertyInfo> GetPropertyCandidates(Type attributeType)220 {221 var propertyCandidates = new List<PropertyInfo>();222 foreach (var pi in attributeType.GetProperties(BindingFlags.Instance | BindingFlags.Public))223 {224 if (pi.CanRead && pi.CanWrite)225 {226 propertyCandidates.Add(pi);227 }228 }229 return propertyCandidates;230 }231 private static bool AreAttributeElementsEqual(object first, object second)232 {233 //we can have either System.Type, string or numeric type234 if (first == null)235 {236 return second == null;237 }238 //let's try string239 var firstString = first as string;240 if (firstString != null)241 {242 return AreStringsEqual(firstString, second as string);243 }244 //by now we should only be left with numeric types245 return first.Equals(second);246 }247 private static bool AreStringsEqual(string first, string second)248 {249 Debug.Assert(first != null, "first != null");250 return first.Equals(second, StringComparison.Ordinal);251 }252 public bool Equals(AttributeDisassembler other)253 {254 return !ReferenceEquals(null, other);255 }256 public override bool Equals(object obj)257 {258 if (ReferenceEquals(null, obj))259 {260 return false;261 }262 if (ReferenceEquals(this, obj))263 {264 return true;265 }266 if (obj.GetType() != typeof(AttributeDisassembler))267 {268 return false;269 }270 return Equals((AttributeDisassembler)obj);271 }272 public override int GetHashCode()273 {274 return GetType().GetHashCode();275 }276 }277}...

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AttributeDisassembler

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1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Telerik.JustMock.Core.Castle.DynamicProxy.Generators;7using Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters.SimpleAST;8using Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters;9using Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters.SimpleAST;10{11 {12 static void Main(string[] args)13 {14 var attributeDisassembler = new AttributeDisassembler();15 var type = typeof(MyClass);16 var attributes = type.GetCustomAttributes(true);17 foreach (var attribute in attributes)18 {19 var attributeBuilder = new AttributeBuilder(attribute.GetType());20 var attributeProperties = attribute.GetType().GetProperties();21 foreach (var attributeProperty in attributeProperties)22 {23 var value = attributeProperty.GetValue(attribute);24 attributeBuilder.SetNamedArgument(attributeProperty.Name, new ConstReference(value));25 }26 attributeDisassembler.AddAttribute(attributeBuilder);27 }28 var assembly = new AssemblyGenerator("MyAssembly");29 var module = new ModuleGenerator(assembly, "MyModule");30 var classEmitter = new ClassEmitter(module, "MyClass", TypeAttributes.Public);31 classEmitter.AddAttribute(attributeDisassembler);32 var method = classEmitter.CreateMethod("MyMethod", MethodAttributes.Public, typeof(void));33 method.GetILGenerator().Emit(OpCodes.Ret);34 classEmitter.CreateType();35 assembly.Save("MyAssembly.dll");36 }37 }38 [AttributeUsage(AttributeTargets.Class)]39 {40 public string MyProperty { get; set; }41 }42 [MyClass(MyProperty = "MyValue")]43 {44 public void MyMethod()45 {46 }47 }48}

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AttributeDisassembler

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1using System;2using System.Reflection;3using Telerik.JustMock.Core.Castle.DynamicProxy.Generators;4{5 {6 static void Main(string[] args)7 {8 AttributeDisassembler disassembler = new AttributeDisassembler();9 byte[] bytes = disassembler.Disassemble(typeof(CustomAttribute).Module);10 Assembly asm = Assembly.Load(bytes);11 Type type = asm.GetType("ConsoleApplication1.CustomAttribute");12 Console.WriteLine(type);13 Console.Read();14 }15 }16 [AttributeUsage(AttributeTargets.All)]17 {18 }19}20using System;21using System.Reflection;22using Telerik.JustMock.Core.Castle.DynamicProxy.Generators;23{24 {25 static void Main(string[] args)26 {27 AttributeDisassembler disassembler = new AttributeDisassembler();28 byte[] bytes = disassembler.Disassemble(typeof(CustomAttribute).Module);29 Assembly asm = Assembly.Load(bytes);30 Type type = asm.GetType("ConsoleApplication1.CustomAttribute");31 Console.WriteLine(type);32 Console.Read();33 }34 }35 [AttributeUsage(AttributeTargets.All)]36 {37 }38}39using System;40using System.Reflection;41using Telerik.JustMock.Core.Castle.DynamicProxy.Generators;42{43 {44 static void Main(string[] args)45 {46 AttributeDisassembler disassembler = new AttributeDisassembler();47 byte[] bytes = disassembler.Disassemble(typeof(CustomAttribute).Module);48 Assembly asm = Assembly.Load(bytes);49 Type type = asm.GetType("ConsoleApplication1.CustomAttribute");50 Console.WriteLine(type);51 Console.Read();52 }53 }54 [AttributeUsage(AttributeTargets.All)]

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AttributeDisassembler

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1using System;2using System.Reflection;3using Telerik.JustMock.Core.Castle.DynamicProxy.Generators;4{5 {6 public static void Main(string[] args)7 {8 AttributeDisassembler ad = new AttributeDisassembler();9 MethodInfo mi = typeof(Program).GetMethod("Test");10 Attribute[] attrs = ad.GetAttributes(mi);11 Console.WriteLine(attrs.Length);12 Console.ReadLine();13 }14 public void Test()15 {16 }17 }18}

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AttributeDisassembler

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1using System;2using System.Reflection;3using Telerik.JustMock.Core.Castle.DynamicProxy.Generators;4{5 {6 public static void Main(string[] args)7 {8 AttributeDisassembler disassembler = new AttributeDisassembler();9 var attr = disassembler.GetAttribute(typeof(ExampleAttribute), typeof(ExampleAttribute).GetTypeInfo().Assembly);10 Console.WriteLine(attr);11 }12 }13 [AttributeUsage(AttributeTargets.All)]14 {15 public string Name { get; set; }16 public string Value { get; set; }17 }18}19[AttributeUsage(AttributeTargets.All)]20 {21 public string Name { get; set; }22 public string Value { get; set; }23 public int Age { get; set; }24 public string Address { get; set; }25 }26[AttributeUsage(AttributeTargets.All)]27 {28 public string Name { get; set; }29 public string Value { get; set; }30 public int Age { get; set; }31 public string Address { get; set; }32 public string City { get; set; }33 }

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AttributeDisassembler

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1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Telerik.JustMock.Core.Castle.DynamicProxy.Generators;7{8 {9 public virtual void Foo() { }10 }11 {12 public override void Foo()13 {14 base.Foo();15 }16 }17 {18 static void Main(string[] args)19 {20 var attributeDisassembler = new AttributeDisassembler();21 var attribute = attributeDisassembler.Disassemble(typeof(B));22 Console.WriteLine(attribute);23 }24 }25}26[GeneratedCode("Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters.SimpleAST.SimpleASTGenerator, Telerik.JustMock.Core.Castle.DynamicProxy", "

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AttributeDisassembler

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1using System;2using System.Reflection;3using Telerik.JustMock.Core.Castle.DynamicProxy.Generators;4{5 {6 static void Main(string[] args)7 {8 var methodInfo = typeof(Program).GetMethod("Test");9 var attrDisassembler = new AttributeDisassembler(methodInfo);10 var attr = attrDisassembler.GetAttributes();11 foreach (var item in attr)12 {13 Console.WriteLine(item.AttributeType);14 }15 }16 public void Test()17 {18 }19 }20}

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1using System.Reflection;2using System;3using Telerik.JustMock.Core.Castle.DynamicProxy.Generators;4{5 public static void Main()6 {7 var assembly = Assembly.LoadFile(@"C:\Users\Public\Documents\Telerik\JustMock\Examples\DynamicProxy\bin\Debug\DynamicProxy.dll");8 var type = assembly.GetType("DynamicProxy.MyClass");9 var disassembler = new AttributeDisassembler(type);10 var result = disassembler.Disassemble();11 Console.WriteLine(result);12 }13}14[module: System.Runtime.CompilerServices.CompilerGeneratedAttribute()]15[module: System.Runtime.Versioning.TargetFrameworkAttribute(".NETFramework,Version=v4.5.2", FrameworkDisplayName = "")]16[module: System.Diagnostics.DebuggableAttribute(System.Diagnostics.DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints)]17[assembly: System.Runtime.CompilerServices.InternalsVisibleToAttribute("DynamicProxy.Tests, PublicKey=002400000480000094000000060200000024

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AttributeDisassembler

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1using Telerik.JustMock.Core.Castle.DynamicProxy.Generators;2using System.Reflection;3using System.Reflection.Emit;4{5 {6 public void Method1()7 {8 var assembly = Assembly.GetExecutingAssembly();9 var module = assembly.GetModules()[0];10 var type = module.GetTypes()[0];11 var method = type.GetMethods()[0];12 var attributeDisassembler = new AttributeDisassembler(method);13 var attributes = attributeDisassembler.GetAttributes();14 var attribute = attributes[0];15 var constructor = attribute.GetConstructor();16 var parameters = constructor.GetParameters();17 var parameter = parameters[0];18 var parameterType = parameter.ParameterType;19 }20 }21}

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AttributeDisassembler

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1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Telerik.JustMock.Core.Castle.DynamicProxy.Generators;7using Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters;8using Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters.SimpleAST;9using Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters.SimpleAST.Impl;10{11 {12 static void Main(string[] args)13 {14 var method = typeof(Program).GetMethod("Main");15 var attributes = method.GetCustomAttributesData();16 var disassembler = new AttributeDisassembler();17 var result = disassembler.Disassemble(attributes);18 Console.WriteLine(result);19 }20 }21}22[AttributeDisassemblerTestAttribute("Test", 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)]23[AttributeDisassemblerTestAttribute(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)]24[AttributeDisassemblerTestAttribute(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)]25[AttributeDisassemblerTestAttribute(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15

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