[jira] Commented: (SLING-1809) Eclipse compiler used in commons.compiler causes "Illegal type in constant pool" with enums

["Stefan Guggisberg (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SLING-1809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12965733#action_12965733 ] 

Stefan Guggisberg commented on SLING-1809:
------------------------------------------

the target version is never explicitly set, i.e. it is not related to or specific to target "jsr14". 
according to bertrand the issue is easily reproducible.  

> Eclipse compiler used in commons.compiler causes "Illegal type in constant pool" with enums
> -------------------------------------------------------------------------------------------
>
>                 Key: SLING-1809
>                 URL: https://issues.apache.org/jira/browse/SLING-1809
>             Project: Sling
>          Issue Type: Bug
>          Components: Commons
>    Affects Versions: Commons Compiler 2.0.0
>            Reporter: Bertrand Delacretaz
>
> According to [0] the eclipse compiler can't handle enums in certain environments.
> The trunk org.apache.sling.commons.compiler bundle embeds (eclipse-jdt) core-3.3.0-v_771.jar which exposes this issue. 
> According to [0] the issue should be fixed in v3.5.2, but the central Maven repository does not provide a more recent version than the one we currently use.
> To reproduce the problem, install the compiler and java scripting bundle and create a scripted java servlet that uses enums (example below), at runtime this causes:
> java.lang.VerifyError: 
> (class: enumtest/EnumTest, method: valueOf signature: (Ljava/lang/String;)Lenumtest/EnumTest;) 
> Illegal type in constant pool
> [0] https://bugs.eclipse.org/bugs/show_bug.cgi?id=291985
> Here's the example servlet, store in /apps/JavaScriptingTest2/JavaScriptingTest2.java and use "JavaScriptingTest2" resource type:
> package apps.JavaScriptingTest2;
> import javax.servlet.http.*;
> import java.io.IOException;
> public class JavaScriptingTest2 extends HttpServlet {
>     static enum EnumTest { FOO, BAR };
>     
>     public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
>         resp.getWriter().write("FOO=" + EnumTest.FOO);
>     }
> }

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