Class Level Constraint BeanValidator

asked 2015-06-30 02:00:15 +0800

ghostomg
15 ● 3

updated 2015-06-30 02:29:14 +0800

I'm using ZK 7.0.3 MVVM, Is that possible to integrated class level constraint to MVVM Zul just like usual (@validator('beanValidator'))?

This is snipset of Zul component:

<intbox id="ibQty" width="200px" 
  value="@bind(fx.qty) @validator('beanValidator')" 
  errorMessage="@load(vmsgs[self])"/>

This is snipset of class level constraint Entity:

@Entity
@AllowFractional(allowedStateProperty = "allowedFractional", 
                 valueProperty = "qty", 
                 message = "Qty can't have fractional")
public class TbInvUserreqDetail implements Serializable {
    //... Others field ...

    @Column(name = "allowedfractional")
    private Boolean allowedFractional = false;

    @Column(name = "qty")
    @NotNull(message = "Qty can't empty.")
    private double qty;

    //... setter getter ...
}

This is snipset of custom validator 'AllowFractional' interface:

@Target({ElementType.METHOD, ElementType.TYPE, ElementType.FIELD, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = AllowFractionalValidator.class)
@Documented
public @interface AllowFractional {
    String message() default "{default message}";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};
    String allowedStateProperty();      
    String valueProperty();    

    @Target({ElementType.TYPE, ElementType.ANNOTATION_TYPE})
    @Retention(RetentionPolicy.RUNTIME)
    @Documented
    @interface List {
        AllowFractional[] value();
    }
}

This is the implemented validator class:

public class AllowFractionalValidator implements ConstraintValidator<AllowFractional, Object> {
    private String allowedStateProperty;
    private String valueProperty;
    private String msg;

    @Override
    public void initialize(AllowFractional a) {
        this.allowedStateProperty = a.allowedStateProperty();
        this.valueProperty = a.valueProperty();
        this.msg = a.message();
    }

    @Override
    public boolean isValid(Object obj, ConstraintValidatorContext context) {
        try {
            Boolean allowedState = Boolean.valueOf(BeanUtils.getProperty(obj, this.allowedStateProperty));
            Double value = Double.valueOf(BeanUtils.getProperty(obj, this.valueProperty));

            if (allowedState) {
                return true;
            } else {
                Double fractionalPart = value % 1;
                Double integralPart = value - fractionalPart;
                if (Double.compare(0d, fractionalPart) >= 0) {
                    return true;
                } else {
                    context.disableDefaultConstraintViolation();
                    context.buildConstraintViolationWithTemplate(msg).addPropertyNode(valueProperty)
                            .addConstraintViolation();
                    return false;
                }
            }
        } catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException ex) {
            Logger.getLogger(AllowFractionalValidator.class.getName()).log(Level.SEVERE, null, ex);
            context.disableDefaultConstraintViolation();
            context.buildConstraintViolationWithTemplate(msg).addPropertyNode(valueProperty)
                    .addConstraintViolation();
            return false;
        }
    }
}

Hibernate validator class level constraint just work fine, and when running the application, Zk general error popup appears :

Validation failed for classes [com.myproject.entity.inv.table.TbInvUserreqDetail] during update time for groups [javax.validation.groups.Default, ] List of constraint violations:[ ConstraintViolationImpl{interpolatedMessage='Qty can't have fractional', propertyPath=qty, rootBeanClass=class com.myproject.entity.inv.table.TbInvUserreqDetail, messageTemplate='Qty can't have fractional'} ]

Could it return the constraint error to ibQty component's errorMessage? Thank you.