Using javax.validation.constraints @Annotations in GOSU

[Will Hu]

Hi Guys...

I am trying to use some data validation annotations in gosu DTO model..

@Length(min=1, max=9)
public var lastName: String

It looks like it does not support doing like @Length(min=1, max=9) or @Size(min=1).

Howver it works with:

@Max(9)
public var size : int

@NotNull
public var lastName : String

Wondering what I may do to use @Length, @Size, etc?

Thanks.

[Kyle Moore]

Hi Will. When setting arguments to annotations you need to use named argument syntax, like this:

@Length(:min=1, :max=9)
public var lastName : String

Also note that if an annotations wants an array of Strings or primitives, make sure to wrap the values with the list initializer {} and they'll be coerced to an array.

There is a small section on "Named Arguments & Default Parameters" here: https://gosu-lang.github.io/docs.html

Good luck,

Kyle

[Will Hu]

Thanks Kyle, sorry our current version does not support named argument syntax for annotations.. (But it works for functions)..ANyway. I may rebuild a gosu version annotations to implement @Length functionality. Thanks very much!