[SLING-1809] Eclipse compiler used in commons.compiler causes "Illegal type in constant pool" with enums

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Commons Compiler 2.0.0
• Fix Version/s: Commons Compiler 2.0.0
• Component/s: Commons
• Assignee: Carsten Ziegeler
• Reporter: Bertrand Delacretaz
• Created: 27/Sep/10 13:04
• Updated: 20/Dec/10 14:52
• Resolved: 16/Dec/10 09:40

Description

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); }

}

Issue Links

• is related to: SLING-1883 commons.compiler 1.0 causes "Illegal type in constant pool" error when java source code contains Enum types