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POFormatting (string-) array as part of bean-validation message
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2012-11-12T13:54:27.917
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I created my first custom validation annotation with validator class as inner class (which i find quite well-arranged). It looks like this: <pre><code>@Target( { ElementType.TYPE }) @Retention(RetentionPolicy.RUNTIME) @Constraint(validatedBy = {OneOfGroupNotNull.Validator.class}) @Documented public @interface OneOfGroupNotNull { // custom annotation properties String[] fields(); // required by JSR-303 String message() default "One of group must be not null. {fields}"; Class<?>[] groups() default {}; Class<? extends Payload>[] payload() default {}; public class Validator implements ConstraintValidator<OneOfGroupNotNull, Object> { private String[] fields; @Override public boolean isValid(Object bean, ConstraintValidatorContext cvc) { int countNotNull = 0; for (String field : fields) { try { String property = BeanUtils.getProperty(bean, field); if (property != null) { countNotNull++; } } catch (Exception ex) { throw new RuntimeException("Validation for field " + field + " of type " + bean.getClass()+ " raised exception.", ex); } } return countNotNull == 1; } @Override public void initialize(OneOfGroupNotNull a) { fields = a.fields(); } } } </code></pre> A bean class that is annotated with this validator may look like this: <pre><code>@OneOfGroupNotNull(fields = {"a", "b", "c"}) public interface MyBean { String getA(); Rarity getB(); Boolean getC(); } </code></pre> The problem is that I cannot find a way to format the string array "fields". It just takes the to string method which results in something like: One of group must be not null. [Ljava.lang.String;@157d954
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<java><bean-validation>
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Formatting (string-) array as part of bean-validation message
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