[FIXED] Validating double and float values using Hibernate Validator - bean validation

Issue

I'm looking for a way to validate a java.lang.Double field in the Spring command bean for its maximum and minimum values (a value must lie between a given range of values) like,

public final class WeightBean
{
     @Max(groups={ValidationGroup.class}, value=Double.MAX_VALUE, message="some key or default message")
     @Min(groups={ValidationGroup.class}, value=1D, message="some key or default message")
     private Double txtWeight;  //Getter and setter.

     public interface ValidationGroup{}         
}

But both @Max and @Min cannot take a java.lang.Double value.

Note that double and float are not supported due to rounding errors (some providers might provide some approximative support)

So what is the way of validating such fields?

I'm working with Spring 3.2.0 and Hibernate Validator 4.3.1 CR1.

Solution

You can use the annotation, but you might get false results depending. This is a general problem with doubles and imo in many cases _Double_s should be avoided. Maybe switching to a different type is the best solution? BigDecimal for example?

Answered By - Hardy