play.data.validation
Classes 
Constraints
Constraints.EmailValidator
Constraints.MaxLengthValidator
Constraints.MaxValidator
Constraints.MinLengthValidator
Constraints.MinValidator
Constraints.PatternValidator
Constraints.RequiredValidator
Constraints.Validator
Validation
ValidationError
Annotation Types 
Constraints.Email
Constraints.Max
Constraints.MaxLength
Constraints.Min
Constraints.MinLength
Constraints.Pattern
Constraints.Required