[hibernate-issues] [Hibernate-JIRA] Commented: (BVAL-202) Apply constraints on the elements of an iterator

[Gunnar Morling (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/BVAL-202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=36696#action_36696 ] 

Gunnar Morling commented on BVAL-202:
-------------------------------------

It would compile, if there was a dedicated @ValidateEach annotation for each constraint, as with @List today:

{noformat}
public @interface Size {

    String message() default "{javax.validation.constraints.Size.message}";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};
    int min() default 0;
    int max() default Integer.MAX_VALUE;

    @interface List {
        Size[] value();
    }
	
    @interface ValidateEach {
    	Size[] value();
    }
}
{noformat}

This would read pretty good as long as only one @ValidateEach is imported. Also list semantics are covered:

{noformat}
@NotNull
@Size(max=30)
@ValidateEach({@Size(max=30), @Size(max=40, groups=Admin.class) })
Collection<String> emails;
{noformat}

It reads slightly worse but still ok when multiple @ValidateEach are required:

{noformat}
@NotNull
@Size(max=30)
@Size.ValidateEach({@Size(max=30), @Size(max=40, groups=Admin.class) })
@Email.ValidateEach(@Email)
Collection<String> emails;
{noformat}

So basically this is similar to #4 without having all attributes from the original constraint again in the sub-annotation.

> Apply constraints on the elements of an iterator
> ------------------------------------------------
>
>                 Key: BVAL-202
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/BVAL-202
>             Project: Bean Validation
>          Issue Type: New Feature
>          Components: spec-general
>            Reporter: Emmanuel Bernard
>            Assignee: Hardy Ferentschik
>
> The use case is the ability to ask a constraint to be applied, not on the annotated element itself but on the elements contained by the annotated element (typically an Iterator). Hardy and I have been discussing various options. I will list them in various comments

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira