[jira] [Commented] (MYFACES-3599) Using Collections.EMPTY_LIST inside converter leads to IllegalAccessException

["Mike Kienenberger (JIRA)" <de...@myfaces.apache.org>]

    [ https://issues.apache.org/jira/browse/MYFACES-3599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13445932#comment-13445932 ] 

Mike Kienenberger commented on MYFACES-3599:
--------------------------------------------

Can you post the full stack trace, please, or at least the parts that immediately proceed the error, which include MyFaces classes?

                
> Using Collections.EMPTY_LIST inside converter leads to IllegalAccessException
> -----------------------------------------------------------------------------
>
>                 Key: MYFACES-3599
>                 URL: https://issues.apache.org/jira/browse/MYFACES-3599
>             Project: MyFaces Core
>          Issue Type: Bug
>    Affects Versions: 2.1.8
>         Environment: Glassfish 3.1 & JUEL EL Implementation
>            Reporter: Ertio Lew
>
> While using a string->list(& viceversa) converter, I made use of Collections.EMPTY_LIST but it gives the following error. (This worked fine with Mojarra)
> <error>
> <error-name>java.lang.IllegalStateException</error-name>
> <error-message>java.lang.RuntimeException: java.lang.IllegalAccessException: Class javax.faces.component.UIComponentBase can not access a member of class java.util.Collections$EmptyList with modifiers "private"</error-message>
> </error>
>  Why cannot I use Collections.EMPTY_LIST but replacing with new ArrayList<Integer>() just works ?
> Converter code as follows:
> ------------------
> FacesConverter(value = "listConverter", forClass = px10.Utils.ListConverter.class)
> public class ListConverter implements Converter {
>     
>     @Override
>     public Object getAsObject(FacesContext fc, UIComponent uic, String stringVal) {
>         if (stringVal==null) 
>             return Collections.EMPTY_LIST; 
>         
>         String[] split = stringVal.split(",");
>         List<Integer> list = new ArrayList<Integer>(split.length);
>         for (int i = 0; i < split.length; i++) {
>             list.add(Integer.parseInt(split[i]));
>         }
>         return list;
>     }
>     ...
>     ...
> }

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