[jboss-jira] [JBoss JIRA] (WFLY-2493) EL cannot access public methods/fields of non-public classes

[Jonáš Trantina (JIRA)]

     [ https://issues.jboss.org/browse/WFLY-2493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonáš Trantina updated WFLY-2493:
---------------------------------

    Description: 
When trying to access public method/field of non-public class that implements public interface via EL I get 
{noformat}
java.lang.IllegalAccessException: Class javax.el.BeanELResolver can not access a member of class X with modifiers "private"
{noformat}
E.g. accessing Collections.unmodifiableList(..).size() via EL will throw the exception, because #unmodifiableList returns non-public implementation of List interface.
This is apparently caused by JDK-4071957 [1], but since that is opened for over 16 years, it should be probably worth it to implement a workaround.
Workaround for this issue is setting setAccessible(true) on the method before invoking it, thus suppress Java access checking.

I have attached a simple reproducer app as well as a stack trace of the exception.

[1] http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4071957

  was:
When trying to access public method/field of non-public class that implements public interface via EL I get 
{noformat}
java.lang.IllegalAccessException: Class javax.el.BeanELResolver can not access a member of class X with modifiers "private"
{noformat}
E.g. accessing Collections.unmodifiableList(..) via EL will throw the exception, because #unmodifiableList returns non-public implementation of List interface.
This is apparently caused by JDK-4071957 [1], but since that is opened for over 16 years, it should be probably worth it to implement a workaround.
Workaround for this issue is setting setAccessible(true) on the method before invoking it, thus suppress Java access checking.

I have attached a simple reproducer app as well as a stack trace of the exception.

[1] http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4071957


    
> EL cannot access public methods/fields of non-public classes
> ------------------------------------------------------------
>
>                 Key: WFLY-2493
>                 URL: https://issues.jboss.org/browse/WFLY-2493
>             Project: WildFly
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: JSF
>         Environment: JBoss AS 7.2.0.Final
>            Reporter: Jonáš Trantina
>         Attachments: elresolver_stack, reproducer.zip
>
>
> When trying to access public method/field of non-public class that implements public interface via EL I get 
> {noformat}
> java.lang.IllegalAccessException: Class javax.el.BeanELResolver can not access a member of class X with modifiers "private"
> {noformat}
> E.g. accessing Collections.unmodifiableList(..).size() via EL will throw the exception, because #unmodifiableList returns non-public implementation of List interface.
> This is apparently caused by JDK-4071957 [1], but since that is opened for over 16 years, it should be probably worth it to implement a workaround.
> Workaround for this issue is setting setAccessible(true) on the method before invoking it, thus suppress Java access checking.
> I have attached a simple reproducer app as well as a stack trace of the exception.
> [1] http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4071957

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