private void ProjectMethods(EmbeddedItem externalItem, EmbeddingObjectOptions options)
{
Type type = externalItem.HostType;
object obj = externalItem.HostObject;
JsValue typeValue = externalItem.ScriptValue;
IList <JsNativeFunction> nativeFunctions = externalItem.NativeFunctions;
bool instance = externalItem.IsInstance;
string typeName = type.FullName;
BindingFlags defaultBindingFlags = ReflectionHelpers.GetDefaultBindingFlags(instance);
var methods = type.GetMethods(defaultBindingFlags).Select(options.ExtendInfo)
.Where((m) => m.IsMapped);
var methodGroups = methods.GroupBy(m => m.Name);
foreach (var methodGroup in methodGroups)
{
string methodName = methodGroup.Key;
MethodInfo[] methodCandidates = methodGroup.Select(m => m.Info).ToArray();
JsValue nativeFunction(JsValue callee, bool isConstructCall, JsValue[] args, ushort argCount, IntPtr callbackData)
{
if (instance && obj == null)
{
CreateAndSetError($"Invalid context while calling method '{methodName}'.");
return(JsValue.Undefined);
}
if (!SelectAndProcessFunction(methodCandidates, args, argCount, out MethodInfo bestSelection, out object[] processedArgs))
{
CreateAndSetError($"Suitable method '{methodName}' was not found.");
return(JsValue.Undefined);
}
object result;
try
{
result = bestSelection.Invoke(obj, processedArgs);
}
catch (Exception e)
{
Exception exception = UnwrapException(e);
var wrapperException = exception as JsException;
JsValue errorValue;
if (wrapperException != null)
{
errorValue = CreateErrorFromWrapperException(wrapperException);
}
else
{
string errorMessage = instance ?
$"Host method '{methodName}' invocation error: {exception.Message}"
:
$"Host static type '{typeName}' method '{methodName}' invocation error: {exception.Message}"
;
errorValue = JsValue.CreateError(JsValue.FromString(errorMessage));
}
JsContext.SetException(errorValue);
return(JsValue.Undefined);
}
JsValue resultValue = MapToScriptType(result);
return(resultValue);
}
nativeFunctions.Add(nativeFunction);
JsValue methodValue = JsValue.CreateNamedFunction(methodName, nativeFunction);
typeValue.SetProperty(methodName, methodValue, true);
}
}
