want to write dynamic domain validation...is it possible to declare annotation @not null dynamically ?

Question

I am writing one model class in spring mvc. I want to do domain validation.

In domain class I have 3 variables say isABCApplicable,abcValue1,abcValue2:

private Boolean isABCApplicable;

private BigDecimal abcValue1;

private BigDecimal abcValue2;

.......getters and setters.........

Now my aim is :

If isABCApplicable is true then i want to make abcValue1 as

@NotNull
 abcValue1 

and

@NotNull 
abcValue2

Is there any way to achieve this?

Answer 1

I believe this is possible by bytecode instrumentation. ASM is one such tool you can manipulate Java bytecode with. Have a look at http://asm.ow2.org/index.html

Answer 2

Why do you want use annotations?
Create your own DataBinder for your model-object and do all validation in object constructor.
Or if you realy want annotations, you can write your own constraint like @NotNullIfApplicable, see Cross field validation with Hibernate Validator (JSR 303) for details.