private static string GetTypeName(TypeToTypeWrapperOptions options, Type originalType)
{
if (options?.TypeNameGenerator != null)
{
return(options.TypeNameGenerator(options, originalType));
}
return("GeneratedType");
}
public static Guid Add(Type type, TypeToTypeWrapperOptions options)
{
var id = Guid.NewGuid();
var factory = options.Factory;
object Create()
{
return(factory(options, type));
}
void OnConstructor(object instance)
{
if (options.OnConstructor == null)
{
return;
}
options.OnConstructor.Invoke(options, type, instance);
}
void OnBeforeMethod(object instance, MethodInfo methodInfo)
{
if (options.OnBeforeMethod == null)
{
return;
}
options.OnBeforeMethod.Invoke(options, type, instance, methodInfo);
}
void OnAfterMethod(object instance, MethodInfo methodInfo)
{
if (options.OnAfterMethod == null)
{
return;
}
options.OnAfterMethod.Invoke(options, type, instance, methodInfo);
}
var item = new TypeCacheItem()
{
Factory = Create,
OnConstructor = OnConstructor,
OnBeforeMethod = OnBeforeMethod,
OnAfterMethod = OnAfterMethod
};
Cache.Add(id, Create);
Cache2.Add(id, item);
return(id);
}
private List <MethodInfo> GetMethodsToWrap(Type originalType, TypeToTypeWrapperOptions options)
{
var result = new List <MethodInfo>();
var allTypeMethods = originalType.GetMethods();
foreach (var methodInfo in allTypeMethods)
{
if (options.IncludeMethod(options, originalType, methodInfo) == false)
{
continue;
}
if (options.ExcludeMethod(options, originalType, methodInfo))
{
continue;
}
if (options.IncludedMethods?.Any() != true)
{
result.Add(methodInfo);
continue;
}
if (options.IncludedMethods?.Contains(methodInfo.Name) == true)
{
result.Add(methodInfo);
continue;
}
foreach (var includedMethodName in options.IncludedMethods)
{
var regEx = NameToRegex(includedMethodName);
if (regEx.IsMatch(methodInfo.Name) == false)
{
continue;
}
result.Add(methodInfo);
break;
}
}
return(result);
}
private static void AddReferences(CodeToAssemblyGenerator generator, List <Type> allTypes, TypeToTypeWrapperOptions options, Type originalType)
{
generator.ReferenceAssemblyContainingType <Action>();
generator.ReferenceAssemblyContainingType <DelegateCache>();
generator.ReferenceAssemblyContainingType <DelegateToTypeWrapper>();
foreach (var allType in allTypes)
{
generator.ReferenceAssembly(allType.Assembly);
}
if (options?.AdditionalReferences?.Any() == true)
{
foreach (var additionalReference in options.AdditionalReferences)
{
generator.ReferenceAssembly(additionalReference);
}
}
if (options?.TypeAttributesGenerator != null)
{
var attrs = options.TypeAttributesGenerator(options, originalType);
foreach (var attribute in attrs)
{
generator.ReferenceAssembly(attribute.GetType().Assembly);
}
}
if (options?.Inherits != null)
{
generator.ReferenceAssembly(options.Inherits.Assembly);
}
}
private static void DoConversions(ParameterInfo[] parameters,
List <ParameterConversionRule> conversionRules,
List <string> constructorParameterNames,
List <string> constructorParameterNamesWithTypes,
List <string> constructorFieldNamesWithTypes,
List <string> propertyNamesWithTypes,
List <string> delegateMethodParameters,
List <string> methodParameterNamesWithTypes, TypeToTypeWrapperOptions options, Type originalType)
{
for (var index = 0; index < parameters.Length; index++)
{
var parameterInfo = parameters[index];
var parameterType = parameterInfo.ParameterType;
var parameterName = parameterInfo.Name ??
$"param{Guid.NewGuid().ToString().ToLowerInvariant().Replace("-", "")}";
var handled = false;
foreach (var conversionRule in conversionRules)
{
var canHandle = conversionRule.CanHandle(parameterInfo);
if (canHandle)
{
var conversionResult = conversionRule.Handle(parameterInfo);
if (!string.IsNullOrWhiteSpace(conversionResult.Name))
{
parameterName = conversionResult.Name;
}
if (conversionResult.ToConstructor)
{
constructorParameterNames.Add(parameterName);
constructorParameterNamesWithTypes.Add($"{GetFriendlyName(parameterType, GetTypeName(options, originalType))} {parameterName}");
var fieldName = $"_{parameterName}";
constructorFieldNamesWithTypes.Add($"{GetFriendlyName(parameterType, GetTypeName(options, originalType))} {fieldName}");
delegateMethodParameters.Add(fieldName);
handled = true;
break;
}
if (conversionResult.ToPublicProperty)
{
var propertyName = $"{CultureInfo.InvariantCulture.TextInfo.ToTitleCase(parameterName)}";
if (string.Equals(parameterName, propertyName))
{
propertyName = $"{propertyName}Prop";
}
propertyNamesWithTypes.Add($"{GetFriendlyName(parameterType, GetTypeName(options, originalType))} {propertyName}");
delegateMethodParameters.Add(propertyName);
handled = true;
break;
}
methodParameterNamesWithTypes.Add($"{GetFriendlyName(parameterType, GetTypeName(options, originalType))} {parameterName}");
delegateMethodParameters.Add(parameterName);
handled = true;
break;
}
}
if (handled)
{
continue;
}
methodParameterNamesWithTypes.Add($"{GetFriendlyName(parameterType, GetTypeName(options, originalType))} {parameterName}");
delegateMethodParameters.Add(parameterName);
}
}
private static void CreateConstructor(TypeToTypeWrapperOptions options, List <string> constructorParameterNames,
List <string> constructorFielsNamesWithTypes,
StringBuilder code, List <string> constructorParameterNamesWithTypes, Type originalType, Guid id)
{
if (constructorParameterNames?.Any() == true)
{
foreach (var fieldNameWithType in constructorFielsNamesWithTypes)
{
code.AppendLine($"private {fieldNameWithType};");
}
code.AppendLine($"public {GetTypeName(options, originalType)}({string.Join(", ", constructorParameterNamesWithTypes)})");
code.AppendLine("{");
foreach (var constructorParameterName in constructorParameterNames)
{
code.AppendLine($"_{constructorParameterName} = {constructorParameterName};");
}
code.AppendLine(
$"RThomasHyde.TypeGenerator.Types.TypeCache.Details(System.Guid.Parse(\"{id.ToString()}\")).OnConstructor.DynamicInvoke(_instance);");
if (options.OnConstructorCustomCodeGenerator != null)
{
code.AppendLine("// Custom constructor code begins");
code.AppendLine(options.OnConstructorCustomCodeGenerator(options, originalType));
code.AppendLine("// Custom constructor code ends");
}
code.AppendLine("}"); // Close constructor
}
else if (options.OnConstructor != null)
{
code.AppendLine($"public {GetTypeName(options, originalType)}()");
code.AppendLine("{");
code.AppendLine(
$"RThomasHyde.TypeGenerator.Types.TypeCache.Details(System.Guid.Parse(\"{id.ToString()}\")).OnConstructor.DynamicInvoke(_instance);");
if (options.OnConstructorCustomCodeGenerator != null)
{
code.AppendLine("// Custom constructor code begins");
code.AppendLine(options.OnConstructorCustomCodeGenerator(options, originalType));
code.AppendLine("// Custom constructor code ends");
}
code.AppendLine("}"); // Close constructor
}
else
{
code.AppendLine($"public {GetTypeName(options, originalType)}()");
code.AppendLine("{");
if (options.OnConstructorCustomCodeGenerator != null)
{
code.AppendLine("// Custom constructor code begins");
code.AppendLine(options.OnConstructorCustomCodeGenerator(options, originalType));
code.AppendLine("// Custom constructor code ends");
}
code.AppendLine("}"); // Close constructor
}
}
private static void CreateWrapperMethod(TypeToTypeWrapperOptions options, Type returnType, StringBuilder code,
List <string> methodParameterNamesWithTypes,
Guid id, List <string> delegateMethodParameters, MethodInfo methodInfo, Type originalType)
{
var originalMethodName = methodInfo.Name;
var generatedMethodName = options.MethodNameGenerator(options, originalType, methodInfo);
if (typeof(void) != returnType)
{
code.AppendLine(
$"public {GetFriendlyName(returnType, GetTypeName(options, originalType))} {generatedMethodName} ({string.Join(", ", methodParameterNamesWithTypes)})");
}
else
{
code.AppendLine(
$"public void {generatedMethodName} ({string.Join(", ", methodParameterNamesWithTypes)})");
}
code.AppendLine("{");
if (options.OnBeforeMethod != null)
{
code.AppendLine(
$"RThomasHyde.TypeGenerator.Types.TypeCache.Details(System.Guid.Parse(\"{id.ToString()}\")).OnBeforeMethod.DynamicInvoke(_instance, _instance.GetType().GetMethod(\"{originalMethodName}\", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Static));");
}
if (options.OnBeforeMethodCustomCodeGenerator != null)
{
code.AppendLine("// Custom before method code begins");
code.AppendLine(options.OnBeforeMethodCustomCodeGenerator(options, originalType, methodInfo));
code.AppendLine("// Custom before method code ends");
}
if (typeof(void) != returnType)
{
code.AppendLine(
$"var result = ({GetFriendlyName(returnType, GetTypeName(options, originalType))}) _instance.{originalMethodName}({string.Join(", ", delegateMethodParameters)});");
}
else
{
code.AppendLine($"_instance.{originalMethodName}({string.Join(", ", delegateMethodParameters)});");
}
if (options.OnAfterMethod != null)
{
code.AppendLine(
$"RThomasHyde.TypeGenerator.Types.TypeCache.Details(System.Guid.Parse(\"{id.ToString()}\")).OnAfterMethod.DynamicInvoke(_instance, _instance.GetType().GetMethod(\"{originalMethodName}\", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Static));");
}
if (options.OnAfterMethodCustomCodeGenerator != null)
{
code.AppendLine("// Custom after method code begins");
code.AppendLine(options.OnAfterMethodCustomCodeGenerator(options, originalType, methodInfo));
code.AppendLine("// Custom after method code ends");
}
if (typeof(void) != returnType)
{
code.AppendLine("return result;");
}
code.AppendLine("}"); // Close method
}
private void AddConstructorParameter(AdditionalParameter additionalConstructorParameter, List <string> constructorParameterNames, List <string> constructorParameterNamesWithTypes, List <string> constructorFieldNamesWithTypes, TypeToTypeWrapperOptions options, Type originalType)
{
constructorParameterNames.Add(additionalConstructorParameter.Name);
constructorParameterNamesWithTypes.Add($"{GetFriendlyName(additionalConstructorParameter.Type, GetTypeName(options, originalType))} {additionalConstructorParameter.Name}");
var fieldName = $"_{additionalConstructorParameter.Name}";
constructorFieldNamesWithTypes.Add($"{GetFriendlyName(additionalConstructorParameter.Type, GetTypeName(options, originalType))} {fieldName}");
}
public Type CreateType(Type originalType, TypeToTypeWrapperOptions options = default)
{
if (originalType == null)
{
throw new ArgumentNullException(nameof(originalType));
}
if (options == null)
{
options = new TypeToTypeWrapperOptions();
}
var methods = GetMethodsToWrap(originalType, options);
var allTypes = new List <Type> {
originalType
};
foreach (var methodInfo in methods)
{
var parameters = methodInfo.GetParameters();
var returnType = methodInfo.ReturnType;
var requiredTypesForMethod = GetRequiredTypes(parameters, returnType);
foreach (var type in requiredTypesForMethod)
{
if (allTypes.Contains(type))
{
continue;
}
allTypes.Add(type);
}
}
var id = TypeCache.Add(originalType, options);
var generator = new CodeToAssemblyGenerator();
AddReferences(generator, allTypes, options, originalType);
var code = new StringBuilder();
AddNamespaces(code, allTypes);
var constructorParameterNames = new List <string>();
var constructorParameterNamesWithTypes = new List <string>();
var constructorFieldNamesWithTypes = new List <string>();
var propertyNamesWithTypes = new List <string>();
var conversionRules = options?.ConversionRules;
if (conversionRules == null)
{
conversionRules = new List <ParameterConversionRule>();
}
var d = new Dictionary <MethodInfo, (List <string>, List <string>)>();
foreach (var methodInfo in methods)
{
var parameters = methodInfo.GetParameters();
var methodParameterNamesWithTypes = new List <string>();
var delegateMethodParameters = new List <string>();
DoConversions(parameters, conversionRules, constructorParameterNames, constructorParameterNamesWithTypes, constructorFieldNamesWithTypes,
propertyNamesWithTypes, delegateMethodParameters, methodParameterNamesWithTypes, options, originalType);
d.Add(methodInfo, (delegateMethodParameters, methodParameterNamesWithTypes));
}
if (options.AdditionalConstructorParameters?.Any() == true)
{
foreach (var additionalConstructorParameter in options.AdditionalConstructorParameters)
{
AddConstructorParameter(additionalConstructorParameter, constructorParameterNames, constructorParameterNamesWithTypes,
constructorFieldNamesWithTypes, options, originalType);
}
}
code.AppendLine();
code.AppendLine($"namespace {GetNamespace(options, originalType)}");
code.AppendLine("{");
var inheritedAndImplementedTypes = new List <Type>();
if (options.Inherits != null)
{
inheritedAndImplementedTypes.Add(options.Inherits);
}
if (options.Implements != null)
{
inheritedAndImplementedTypes.AddRange(options.Implements);
}
var inheritance = "";
if (inheritedAndImplementedTypes.Any())
{
inheritance = $" : {string.Join(", ", inheritedAndImplementedTypes.Select(x => x.FullName))}";
}
code.AppendLine($"public class {GetTypeName(options, originalType)} {inheritance}");
code.AppendLine("{");
CreateInstance(originalType, code, id);
CreateConstructor(options, constructorParameterNames, constructorFieldNamesWithTypes, code, constructorParameterNamesWithTypes, originalType, id);
CreateProperties(propertyNamesWithTypes, code);
foreach (var methodInfo in methods)
{
var parameters = methodInfo.GetParameters();
var returnType = methodInfo.ReturnType;
var p = d[methodInfo];
CreateWrapperMethod(options, returnType, code, p.Item2, id, p.Item1, methodInfo, originalType);
}
if (options.CustomCodeGenerator != null)
{
code.AppendLine("// Custom code begins");
code.AppendLine(options.CustomCodeGenerator(options, originalType));
code.AppendLine("// Custom code ends");
}
if (options.IsSourceCodeIncluded)
{
code.AppendLine("##sourceplaceholder##");
}
code.AppendLine("}"); // Close class
code.AppendLine("}"); // Close namespace
var fullCode = code.ToString();
if (options.IsSourceCodePrettified)
{
fullCode = CSharpSyntaxTree.ParseText(fullCode).GetRoot().NormalizeWhitespace().ToFullString();
}
if (options.IsSourceCodeIncluded)
{
code.AppendLine("// Source code begins");
fullCode = fullCode.Replace("##sourceplaceholder##", $"private string _source = @\"{Environment.NewLine}{fullCode.Replace("\"", "\"\"").Replace("##sourceplaceholder##", "")}\";");
code.AppendLine("// Source code ends");
}
var assembly = generator.GenerateAssembly(fullCode);
var result = assembly.GetExportedTypes().Single();
return(result);
}