Annotations

Beans can be annotated to indicate validations. They are set to fields. and these are some of the most common ones:

• AssertTrue

• Max

• Min

• NotNull

Usage

public class ValidatedClass {

   @NotNull
   private String field;

}

Applying validation groups:

public class ValidatedClass {

   @NotNull(groups = { UpdateValidationGroup.class, CreateValidationGroup.class })
   private String field;

}

The groups can be any class or interface.