@Digits (javax)

The @javax.validation.constraints.Digits annotation is recognized by Apache Isis as a means to specify the precision for properties and action parameters of type java.math.BigDecimal.

For example:

@javax.jdo.annotations.Column(
    scale=2                                              (1)
)
@javax.validation.constraints.Digits(
    integer=10,
    fraction=2                                           (2)
)
public BigDecimal getCost() {
    return cost;
}
public void setCost(final BigDecimal cost) {
    this.cost = cost!=null
        ? cost.setScale(2, BigDecimal.ROUND_HALF_EVEN)   (3)
        :null;
}
1 the @Column#scale attribute must be …​
2 …​ consistent with @Digits#fraction()
3 the correct idiom when setting a new value is to normalized to the correct scale