Cross field validation with HibernateValidator displays no error messages

Question

I\'m validating two fields, \"password\" and \"confirmPassword\" on the form for equality using HibernateValidator as specified in this answer. The following is the cons

Answer 1

Could you try your isValid method to be like this? (this is certainly working for me in live project):

 public boolean isValid(final Object value, final ConstraintValidatorContext cvc){
    boolean toReturn = false;

    try{
        final Object firstObj = BeanUtils.getProperty(value, firstFieldName );
        final Object secondObj = BeanUtils.getProperty(value, secondFieldName );

        //System.out.println("firstObj = "+firstObj+"   secondObj = "+secondObj);

        toReturn = firstObj == null && secondObj == null || firstObj != null && firstObj.equals(secondObj);
    }
    catch (final Exception e){
        System.out.println(e.toString());
    }
    //If the validation failed
    if(!toReturn) {
        cvc.disableDefaultConstraintViolation();
        //In the initialiaze method you get the errorMessage: constraintAnnotation.message();
        cvc.buildConstraintViolationWithTemplate(errorMessage).addNode(firstFieldName).addConstraintViolation();
    }
    return toReturn;
}

Also I see that you are implementing the ConstraintValidator interface with an Object, literally. It should be the backing object that you have from your form:

tempBean // the one that you specify in the commandName actually.

So you implementation should like this:

 implements ConstraintValidator<FieldMatch, TempBean>

This is probably not the issue here, but as a future reference, this is how it should be.

UPDATE

Inside your FieldMatch interface/annotation you have two methods : first and second, add one more called errorMessage for example:

  Class<? extends Payload>[] payload() default {};

/**
 * @return The first field
 */
String first();

/**
 * @return The second field
 */
String second();

/**
  @return the Error Message
 */
String errorMessage

Look inside you method from the Validation class - you are getting the first and second field names there., so just add the errorMessage, like this for example:

  private String firstFieldName;
  private String secondFieldName;
  //get the error message name
  private String errorMessagename; 
public void initialize(final FieldMatch constraintAnnotation)
{
    firstFieldName = constraintAnnotation.first();
    secondFieldName = constraintAnnotation.second();
    errorMessageNAme = constraintAnnotation.errorMessage(); 

    //System.out.println("firstFieldName = "+firstFieldName+"   secondFieldName = "+secondFieldName);
}

Inside isValida get it, the same way you do for first and second field name and use it.