[forge-issues] [JBoss JIRA] (FORGE-1671) Add nested annotation to a constraint annotation

[Antonio Goncalves (JIRA)]

    [ https://issues.jboss.org/browse/FORGE-1671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12958237#comment-12958237 ] 

Antonio Goncalves commented on FORGE-1671:
------------------------------------------

Another attempt... but looks like it's impossible to do with Roaster at the moment : 

{code}
public class BeanValidationAnnotation {

    public static void main(String[] args) {

        // This is the inner annotation List
        final JavaAnnotationSource listAnnotation = Roaster.create(JavaAnnotationSource.class);
        listAnnotation.setName("List");
        listAnnotation.addAnnotation(Retention.class).setEnumValue(RUNTIME);
        listAnnotation.addAnnotation(Target.class).setEnumValue(METHOD, FIELD, PARAMETER, TYPE);
        listAnnotation.addAnnotationElement("Email[] value()");
        System.out.println(listAnnotation);

        // This is the annotation @Email
        final JavaAnnotationSource emailAnnotation = Roaster.create(JavaAnnotationSource.class);
        emailAnnotation.setPackage("org.agoncal.proj.constraints").setName("Email");
        emailAnnotation.addImport(Payload.class);
        emailAnnotation.addAnnotation(Documented.class);
        emailAnnotation.addAnnotation(Retention.class).setEnumValue(RUNTIME);
        emailAnnotation.addAnnotation(Target.class).setEnumValue(METHOD, FIELD, PARAMETER, TYPE);
        emailAnnotation.addAnnotation(Constraint.class).setLiteralValue("validatedBy", "{}");
        emailAnnotation.addAnnotationElement("String message() default \"wrong email address\"");
        emailAnnotation.addAnnotationElement("Class<?>[] groups() default {}");
        emailAnnotation.addAnnotationElement("Class<? extends Payload>[] payload() default {}");

        // I was expecting to have a method like that so I could add annotation inside another one
        // emailAnnotation.addAnnotationElement(emailAnnotation);

        System.out.println(emailAnnotation);

    }

}
{code}
                
> Add nested annotation to a constraint annotation
> ------------------------------------------------
>
>                 Key: FORGE-1671
>                 URL: https://issues.jboss.org/browse/FORGE-1671
>             Project: Forge
>          Issue Type: Sub-task
>          Components: Java EE
>    Affects Versions: 2.2.0.Final
>            Reporter: Antonio Goncalves
>             Fix For: 2.x Future
>
>
> At the moment a constraint annotation does not contain a {{List}} of constraints. So, at the moment, the command {{constraint-new-annotation}} generates the following code : 
> {code}
> @Documented
> @Constraint(validatedBy = {})
> @Target( { METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
> @Retention(RUNTIME)
> @ReportAsSingleViolation
> public @interface URL {
> 	String message() default "Invalid value";
> 	Class<?>[] groups() default { };
> 	Class<? extends Payload>[] payload() default { };
> {code}
> It should add a nested annotation {{List}} of type array of constraint
> {code}
> @Documented
> @Constraint(validatedBy = {})
> @Target( { METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
> @Retention(RUNTIME)
> @ReportAsSingleViolation
> public @interface URL {
> 	String message() default "Invalid value";
> 	Class<?>[] groups() default { };
> 	Class<? extends Payload>[] payload() default { };
> 	@Target( { METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
> 	@Retention(RUNTIME)
> 	@Documented
> 	public @interface List {
> 		URL[] value();
> 	}
> }
> {code}
> See class : {{NewAnnotationCommand}}

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