private static void CreateDelegateWrapperMethod(DelegateToTypeWrapperOptions options, Type returnType, StringBuilder code, List <string> methodParameterNamesWithTypes,
Guid id, List <string> delegateMethodParameters)
{
if (typeof(void) != returnType)
{
code.AppendLine(
$"public {GetFriendlyName(returnType)} {GetMethodName(options)} ({string.Join(", ", methodParameterNamesWithTypes)})");
}
else
{
code.AppendLine(
$"public void Run ({string.Join(", ", methodParameterNamesWithTypes)})");
}
code.AppendLine("{");
code.AppendLine($"var deleg = Weikio.TypeGenerator.Delegates.DelegateCache.Get(System.Guid.Parse(\"{id.ToString()}\"));");
if (typeof(void) != returnType)
{
code.AppendLine(
$"return ({GetFriendlyName(returnType)}) deleg.DynamicInvoke({string.Join(", ", delegateMethodParameters)});");
}
else
{
code.AppendLine(
$"deleg.DynamicInvoke({string.Join(", ", delegateMethodParameters)});");
}
code.AppendLine("}"); // Close method
}
private static string GetTypeName(DelegateToTypeWrapperOptions options)
{
if (options?.TypeNameGenerator != null)
{
return(options.TypeNameGenerator(options));
}
return("GeneratedType");
}
private static string GetMethodName(DelegateToTypeWrapperOptions options)
{
if (options?.MethodNameGenerator != null)
{
return(options.MethodNameGenerator(options));
}
return("Run");
}
private static void CreateConstructor(DelegateToTypeWrapperOptions options, List <string> constructorParameterNames, List <string> constructorFielsNamesWithTypes,
StringBuilder code, List <string> constructorParameterNamesWithTypes)
{
if (constructorParameterNames?.Any() == true)
{
foreach (var fieldNameWithType in constructorFielsNamesWithTypes)
{
code.AppendLine($"private {fieldNameWithType};");
}
code.AppendLine($"public {GetTypeName(options)}({string.Join(", ", constructorParameterNamesWithTypes)})");
code.AppendLine("{");
foreach (var constructorParameterName in constructorParameterNames)
{
code.AppendLine($"_{constructorParameterName} = {constructorParameterName};");
}
code.AppendLine("}"); // Close constructor
}
}
public Type CreateType(MulticastDelegate multicastDelegate,
DelegateToTypeWrapperOptions options = default)
{
var methodInfo = multicastDelegate.GetMethodInfo();
if (methodInfo == null)
{
throw new Exception("Couldn't get method info from delegate");
}
var parameters = methodInfo.GetParameters();
var returnType = methodInfo.ReturnType;
var id = DelegateCache.Add(multicastDelegate);
var allTypes = GetRequiredTypes(parameters, returnType);
var generator = new CodeToAssemblyGenerator();
AddReferences(generator, allTypes);
var code = new StringBuilder();
AddNamespaces(code, allTypes);
var constructorParameterNames = new List <string>();
var methodParameterNamesWithTypes = new List <string>();
var constructorParameterNamesWithTypes = new List <string>();
var constructorFielsNamesWithTypes = new List <string>();
var propertyNamesWithTypes = new List <string>();
var delegateMethodParameters = new List <string>();
var conversionRules = options?.ConversionRules;
if (conversionRules == null)
{
conversionRules = new List <ParameterConversionRule>();
}
DoConversions(parameters, conversionRules, constructorParameterNames, constructorParameterNamesWithTypes, constructorFielsNamesWithTypes, delegateMethodParameters, propertyNamesWithTypes, methodParameterNamesWithTypes);
code.AppendLine();
code.AppendLine($"namespace {GetNamespace(options)}");
code.AppendLine("{");
code.AppendLine($"public class {GetTypeName(options)}");
code.AppendLine("{");
CreateConstructor(options, constructorParameterNames, constructorFielsNamesWithTypes, code, constructorParameterNamesWithTypes);
CreateProperties(propertyNamesWithTypes, code);
CreateDelegateWrapperMethod(options, returnType, code, methodParameterNamesWithTypes, id, delegateMethodParameters);
code.AppendLine("}"); // Close class
code.AppendLine("}"); // Close namespace
var s = code.ToString();
var assembly = generator.GenerateAssembly(s);
var result = assembly.GetExportedTypes().Single();
return(result);
}