FRuleConvert() static private method

static private FRuleConvert ( Field obj ) : Field
obj Field
return Field
        private void AddMiscFunctions()
        {
            Register(config => config.Named("iif")
                     .WithBooleanParameter("condition")
                     .WithDynamicParameter("ifTrue")
                     .WithDynamicParameter("ifFalse")
                     .WhenExecute(context => SystemFunctions.Iif(context))
                     .ReturnsType(IifReturnType));

            Register(config => config.Named("i_frule_convert")
                     .WithDynamicParameter("rule")
                     .WhenExecute(context => Simple(context, args => SystemFunctions.FRuleConvert(args[0])))
                     .ReturnsType(context => {
                var argType = ReturnType(context.Arguments[0], context);
                return(argType is StringType ? (SqlType)PrimitiveTypes.Numeric() : (SqlType)PrimitiveTypes.String());
            }));
        }
        private void MiscFunctions()
        {
            Register(config => config.Named("iif")
                     .WithBooleanParameter("condition")
                     .WithDynamicParameter("ifTrue")
                     .WithDynamicParameter("ifFalse")
                     .WhenExecute(context => Simple(context, args => {
                Field result = Field.Null();

                var condition = args[0];
                if (condition.Type is BooleanType)
                {
                    if (condition.Equals(Field.BooleanTrue))
                    {
                        result = args[1];
                    }
                    else if (condition.Equals(Field.BooleanFalse))
                    {
                        result = args[2];
                    }
                }

                return(result);
            }))
                     .ReturnsType(IifReturnType));

            Register(config => config.Named("i_frule_convert")
                     .WithDynamicParameter("rule")
                     .WhenExecute(context => Simple(context, args => SystemFunctions.FRuleConvert(args[0])))
                     .ReturnsType(context => {
                var argType = ReturnType(context.Arguments[0].Value, context);
                return(argType is StringType ? PrimitiveTypes.Numeric() : (SqlType)PrimitiveTypes.String());
            }));

            Register(config => config.Named("i_privilege_string")
                     .WithNumericParameter("privBit")
                     .WhenExecute(context => Simple(context, args => SystemFunctions.PrivilegeString(args[0])))
                     .ReturnsString());

            // VERSION
            Register(config => config
                     .Named("version")
                     .WhenExecute(context => context.Result(Field.String(context.Request.Query.Session.Database().Version.ToString(3))))
                     .ReturnsString());

            // COALESCE
            Register(config => config.Named("coalesce")
                     .WhenExecute(context => Simple(context, args => {
                var argc = args.Length;
                for (int i = 0; i < argc; i++)
                {
                    var arg = args[i];
                    if (!Field.IsNullField(arg))
                    {
                        return(arg);
                    }
                }

                return(Field.Null());
            }))
                     .ReturnsType(context => {
                var argc = context.Arguments.Length;
                for (int i = 0; i < argc; i++)
                {
                    var returnType = context.Arguments[i].Value.ReturnType(context.Request, context.VariableResolver);
                    if (!(returnType is NullType))
                    {
                        return(returnType);
                    }
                }

                return(PrimitiveTypes.Null());
            }));

            // object instantiation
            Register(config => config.Named("new_object")
                     .WithStringParameter("typeName")
                     .WithUnoundedParameter("args", Function.DynamicType)
                     .WhenExecute(context => {
                var typeName = context.EvaluatedArguments[0];
                var argc     = context.ArgumentCount;
                var args     = new Field[argc - 1];
                if (argc > 1)
                {
                    Array.Copy(context.EvaluatedArguments, 1, args, 0, args.Length);
                }

                var obj = SystemFunctions.NewObject(context.Request, typeName, args);
                return(context.Result(obj));
            }).ReturnsType(context => {
                var typeName = context.EvaluatedArguments[0].Value.ToString();
                return(context.Request.Access().ResolveUserType(typeName));
            }));
        }