| Class | Description | 
|---|---|
| BlankConstraint | A Constraint that validates a string is not blank. | 
| ConstrainedDelegate | Bridge from the old API to the new | 
| ConstrainedPropertyBuilder | Builder used as a delegate within the "constraints" closure of GrailsDomainClass instances . | 
| ConstraintDelegate | Bridges old validation API and new API | 
| ConstraintEvalUtils | Utility methods for configuring constraints | 
| ConstraintsEvaluatorFactoryBean | Constructs the default constraints evaluator instance. | 
| CreditCardConstraint | Validates a credit card number. | 
| DefaultConstraintEvaluator | Default implementation of the ConstraintsEvaluator interface. | 
| DomainClassPropertyComparator | Comparator that uses the domain class property constraints to establish order in sort methods and always places the id first. | 
| EmailConstraint | Validates an email address. | 
| GrailsDomainClassValidator | A specialised Spring validator that validates a domain class instance using the constraints defined in the static constraints closure. | 
| InListConstraint | A constraint that validates the property is contained within the supplied list. | 
| MatchesConstraint | Validates the property against a supplied regular expression. | 
| MaxConstraint | Implements a maximum value constraint. | 
| MaxSizeConstraint | Validates maximum size or length of the property, for strings and arrays this is the length and collections the size. | 
| MinConstraint | Implements a minimum value constraint. | 
| MinSizeConstraint | Validates minimum size or length of the property, for strings and arrays this is the length and collections the size. | 
| NotEqualConstraint | Validates not equal to something. | 
| NullableConstraint | Validates not null. | 
| RangeConstraint | Validates a range. | 
| ScaleConstraint | Manages the scale for floating point numbers (i.e., the number of digits to the right of the decimal point). | 
| SizeConstraint | Validates size of the property, for strings and arrays this is the length, collections the size and numbers the value. | 
| UrlConstraint | Validates a url. | 
| ValidatorConstraint |