| public static NewObject ( IRequest context, Field typeName, Field args = null ) : Field | ||
| context | IRequest | |
| typeName | Field | |
| args | Field | |
| return | Field | |
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));
}));
}