Variable based javax bean validation?

Suppose I have a class with two member variables:

import javax.validation.constraints.Min;
class Foo {
    private int minimumAge;
    private int maximumAge;
}

I know I can verify min / max like this:

@Min(1)
private int minimumAge;

@Max(99)
private int maximumAge;

But what I really want to do is make sure that minimumage is always less than or equal to maximumage So I want something like this:

@Min(1)
@Max(maximumAge)
private int minimumAge;

@Min(minumumAge)
@Max(99)
private int maximumAge;

But this verification framework seems impossible because it can only use constant expressions Is there any way to do such a thing?

thank you!

Solution

As Zack said, you can use custom constraints

With hibernate validator, you can use @ scriptasset constraint, which allows you to define constraints using any JSR 223 compatible script engine:

@ScriptAssert(lang = "javascript",script = "_this.minimumAge < _this.maximumAge")
public class MyBean {

  @Min(1)
  private int minimumAge;

  @Max(99)
  private int maximumAge;

}

If you really need to declare constraints dynamically, you can use hibernate validator's API for programming constraint definition:

int dynamicallyCalculatedConstraintValue = ...;

ConstraintMapping mapping = new ConstraintMapping();
mapping.type( MyBean.class )
  .property( "mininumAge",FIELD )
    .constraint( new MaxDef().value( dynamicallyCalculatedConstraintValue ) );

HibernateValidatorConfiguration config = Validation.byProvider( HibernateValidator.class ).configure();
config.addMapping( mapping );
Validator validator = config.buildValidatorFactory().getValidator();