public override bool IsAssignableFrom(System.Reflection.TypeInfo typeInfo)
{
if (typeInfo == null)
{
return(false);
}
return(IsAssignableFrom(typeInfo.AsType()));
}
internal static object Wrap(Type serviceInterfaceType, Func <string, System.Reflection.MethodInfo, object[], object> CallMethodAction, Func <string, System.Reflection.MethodInfo, object[], object> CallMethodAsyncAction)
{
//this method load GetCurrentMethod for xamarin linked assembly
//System.Reflection.MethodBase fix = System.Reflection.MethodInfo.GetCurrentMethod();
System.Reflection.AssemblyName assemblyName = new System.Reflection.AssemblyName(string.Format("tmp_{0}", serviceInterfaceType.FullName));
string moduleName = string.Format("{0}.dll", assemblyName.Name);
string ns = serviceInterfaceType.Namespace;
if (!string.IsNullOrEmpty(ns))
{
ns += ".";
}
ServiceContractAttribute attrib = serviceInterfaceType.GetCustomAttributes <ServiceContractAttribute>(true).Where(x => x.ServiceType == ServiceType.ServerService || x.ServiceType == ServiceType.ClientService || x.ServiceType == ServiceType.StreamService).FirstOrDefault();
#if (NET35)
AssemblyBuilder assembly = AppDomain.CurrentDomain.DefineDynamicAssembly(assemblyName,
AssemblyBuilderAccess.Run);
#elif (NET40)
var assembly = AppDomain.CurrentDomain.DefineDynamicAssembly(assemblyName,
AssemblyBuilderAccess.RunAndCollect);
#else
AssemblyBuilder assembly = AssemblyBuilder.DefineDynamicAssembly(assemblyName,
AssemblyBuilderAccess.RunAndCollect);
#endif
#if (NETSTANDARD || NETCOREAPP || PORTABLE)
ModuleBuilder module = assembly.DefineDynamicModule(moduleName);
#else
ModuleBuilder module = assembly.DefineDynamicModule(moduleName, false);
#endif
TypeBuilder type = module.DefineType(string.Format("{0}InterfaceWrapper_{1}", ns, serviceInterfaceType.Name),
System.Reflection.TypeAttributes.Class |
System.Reflection.TypeAttributes.AnsiClass |
System.Reflection.TypeAttributes.Sealed |
System.Reflection.TypeAttributes.NotPublic);
type.AddInterfaceImplementation(serviceInterfaceType);
// Define _Service0..N-1 private service fields
FieldBuilder[] fields = new FieldBuilder[2];
#if (NETSTANDARD || NETCOREAPP)
CustomAttributeBuilder cab = new CustomAttributeBuilder(
System.Reflection.IntrospectionExtensions.GetTypeInfo(typeof(DebuggerBrowsableAttribute)).GetConstructor(new Type[] { typeof(DebuggerBrowsableState) }),
new object[] { DebuggerBrowsableState.Never });
#else
CustomAttributeBuilder cab = new CustomAttributeBuilder(
typeof(DebuggerBrowsableAttribute).GetConstructor(new Type[] { typeof(DebuggerBrowsableState) }),
new object[] { DebuggerBrowsableState.Never });
#endif
fields[0] = type.DefineField(string.Format("_Service{0}", 0),
serviceInterfaceType, System.Reflection.FieldAttributes.Public);
fields[1] = type.DefineField(string.Format("_Service{0}", 1),
serviceInterfaceType, System.Reflection.FieldAttributes.Public);
// Ensure the field don't show up in the debugger tooltips
fields[0].SetCustomAttribute(cab);
fields[1].SetCustomAttribute(cab);
// Define a simple constructor that takes all our services as arguments
ConstructorBuilder ctor = type.DefineConstructor(System.Reflection.MethodAttributes.Public,
System.Reflection.CallingConventions.HasThis,
new Type[] { CallMethodAction.GetType(), CallMethodAsyncAction.GetType() });
ILGenerator generator = ctor.GetILGenerator();
generator.Emit(OpCodes.Ldarg_0);
generator.Emit(OpCodes.Ldarg_1);
generator.Emit(OpCodes.Stfld, fields[0]);
generator.Emit(OpCodes.Ldarg_0);
generator.Emit(OpCodes.Ldarg_2);
generator.Emit(OpCodes.Stfld, fields[1]);
generator.Emit(OpCodes.Ret);
foreach (Type serviceType in GetFullTypes(serviceInterfaceType))
{
// Implement all the methods of the interface
foreach (System.Reflection.MethodInfo method in serviceType.GetListOfMethods())
{
//generator.Emit(OpCodes.Pop);
System.Reflection.ParameterInfo[] args = method.GetParameters();
MethodBuilder methodImpl = type.DefineMethod(method.Name,
System.Reflection.MethodAttributes.Public | System.Reflection.MethodAttributes.Virtual,
method.ReturnType, (from arg in args select arg.ParameterType).ToArray());
for (int i = 0; i < args.Length; i++)
{
ParameterBuilder parameterBuilder = methodImpl.DefineParameter(i + 1, System.Reflection.ParameterAttributes.None, args[i].Name);
}
// Generate code to simply call down into each service object
// Any return values are discarded, except the last one, which is returned
generator = methodImpl.GetILGenerator();
System.Reflection.MethodInfo invoke = null;
if (method.ReturnType.GetBaseType() == typeof(Task))
{
invoke = CallMethodAsyncAction.GetType().FindMethod("Invoke");
generator.Emit(OpCodes.Ldarg_0); //stack [this]
generator.Emit(OpCodes.Ldfld, fields[1]); //stack
}
else
{
invoke = CallMethodAction.GetType().FindMethod("Invoke");
generator.Emit(OpCodes.Ldarg_0); //stack [this]
generator.Emit(OpCodes.Ldfld, fields[0]); //stack
}
if (attrib == null)
{
throw new Exception("attrib not found");
}
string serviceName = attrib.Name;
if (attrib.ServiceType == ServiceType.ClientService)
{
serviceName = attrib.GetServiceName(false);
}
//add name of service
generator.Emit(OpCodes.Ldstr, serviceName);
System.Reflection.MethodInfo getCurgntMethod = typeof(System.Reflection.MethodBase).FindMethod("GetCurrentMethod");
if (getCurgntMethod == null)
{
throw new Exception("GetCurrentMethod not found");
}
//add current method info
generator.Emit(OpCodes.Call, getCurgntMethod);
//add obj[] argumants
if (args.Length > 0)
{
EmitInt32(generator, args.Length);
generator.Emit(OpCodes.Newarr, typeof(object));
for (int index = 0; index < args.Length; index++)
{
generator.Emit(OpCodes.Dup);
EmitInt32(generator, index);
switch (index)
{
case 0: generator.Emit(OpCodes.Ldarg_1); break;
case 1: generator.Emit(OpCodes.Ldarg_2); break;
case 2: generator.Emit(OpCodes.Ldarg_3); break;
default:
generator.Emit(index < 255 ? OpCodes.Ldarg_S
: OpCodes.Ldarg, index + 1);
break;
}
//generator.Emit(OpCodes.Ldstr, args[index].Name);
generator.Emit(OpCodes.Box, args[index].ParameterType);
generator.Emit(OpCodes.Stelem_Ref);
}
}
else
{
EmitInt32(generator, 0);
generator.Emit(OpCodes.Newarr, typeof(object));
}
if (invoke == null)
{
throw new Exception("invoke not found");
}
generator.EmitCall(OpCodes.Call, invoke, null);
if (method.ReturnType == typeof(void))
{
generator.Emit(OpCodes.Pop);
}
else
{
generator.Emit(OpCodes.Castclass, method.ReturnType);
generator.Emit(OpCodes.Unbox_Any, method.ReturnType);
}
//generator.Emit(OpCodes.Castclass, method.ReturnType);
generator.Emit(OpCodes.Ret);
}
}
#if (NETSTANDARD || NETCOREAPP || PORTABLE)
System.Reflection.TypeInfo newType = type.CreateTypeInfo();
return(Activator.CreateInstance(newType.AsType(), CallMethodAction, CallMethodAsyncAction));
#else
Type newType = type.CreateType();
return(Activator.CreateInstance(newType, CallMethodAction, CallMethodAsyncAction));
#endif
}
