Oval of Java object verification framework

As long as there is an interface, there will be parameter verification. Currently there are many open-source verification frameworks, but you have to mention oval.
Oval is an extensible Java object data verification framework. The verification rules can be set through the configuration file, annotation, and pojos. You can write rules using pure Java, JavaScript, groovy, beanshell, and so on.
Easy to use

 Public   Class  Ovaltest {@ min ( 20 )  Private   Int  Age; @ length (min = 6, max = 10 )  Private  String name;  Public   Static  Void  Main (string [] ARGs) {ovaltest = New  Ovaltest (); ovaltest. Age = 10 ; Ovaltest. Name = "Kolor" ; Validator = New  Validator (); List <Constraintviolation> ret = Validator. Validate (ovaltest); system. Out. println (RET );}} 

The verification is not feasible. The output is as follows:

[Net. SF. Oval. constraintviolation: ovaltest. Age cannot be smaller than 20.0, net. SF. Oval. constraintviolation: ovaltest. Name is not between 6 and 10 characters long]

Maven dependency:

 <  Dependency  >      <  Groupid  > Net. SF. oval </  Groupid  >      <  Artifactid  > Oval</  Artifactid  >      <  Version  > 1.81 </  Version  >  </  Dependency  > 

Oval official address: http://oval.sourceforge.net/