[jira] [Commented] (FREEMARKER-216) IllegalAccessException in Java 17

["Dániel Dékány (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FREEMARKER-216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17822851#comment-17822851 ] 

Dániel Dékány commented on FREEMARKER-216:
------------------------------------------

Fixed in 2.3-gae and 2.3 branches. The reason of this error is "JEP 396: Strongly Encapsulate JDK Internals by Default", where now you are not allowed to call public methods on public methods, if they are JDK internal. Better said, if the target class is in a module that doesn't export the containing package. Now we check if we have a such issue, and look for a similar method that's in a class that is in an accessible package.

> IllegalAccessException in Java 17
> ---------------------------------
>
>                 Key: FREEMARKER-216
>                 URL: https://issues.apache.org/jira/browse/FREEMARKER-216
>             Project: Apache Freemarker
>          Issue Type: Bug
>          Components: engine
>    Affects Versions: 2.3.32
>            Reporter: Christopher Smith
>            Priority: Critical
>
> I am using Freemarker in an annotation processor to generate code. I supply an instance of {{javax.lang.model.element.TypeElement}}, which implements {{QualifiedNameable}}, to the template model and use {{element.qualifiedName}} as a template variable.
> My code works fine under Java 11, but after updating the compiler to Java 17 (even with Java 11 compliance settings), I am receiving an {{IllegalAccessException}}.
> There seems to be a severely deficient implementation in the encapsulation of Java internals that does not make methods that implement an interface accessible, but perhaps it's possible to get the {{Method}} handles for the property accessors on interfaces? I see that {{ClassIntrospector#discoverAccessibleMethods}} tries to do this, but perhaps it's not taking into account JPMS?
> {code}
> Caused by: java.lang.IllegalAccessException: class freemarker.ext.beans.BeansWrapper cannot access class com.sun.tools.javac.code.Symbol$ClassSymbol (in module jdk.compiler) because module jdk.compiler does not export com.sun.tools.javac.code to unnamed module @43c3d622
>         at java.base/jdk.internal.reflect.Reflection.newIllegalAccessException(Reflection.java:392)
>         at java.base/java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:674)
>         at java.base/java.lang.reflect.Method.invoke(Method.java:560)
>         at freemarker.ext.beans.BeansWrapper.invokeMethod(BeansWrapper.java:1553)
>         at freemarker.ext.beans.BeanModel.invokeThroughDescriptor(BeanModel.java:233)
>         at freemarker.ext.beans.BeanModel.get(BeanModel.java:152)
>         ... 129 more
> {code}
> {code}
> FreeMarker template error:An error has occurred when reading existing sub-variable "qualifiedName"; see cause exception! The type of the containing value was: extended_hash+string (com.sun.tools.javac.code.Symbol$ClassSymbol wrapped into f.e.b.StringModel)
> {code}



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