Java Glassfish java.lang.IllegalAccessError: tried to access method com.sun.jna.Pointer on glassfish 3.1.2.2

Question

I have serious problem and I have tried all possible ideas, I did read also answers on stackoverflow on similar issue whaich were of no use to me.

What actually happens is I am deploying application on glassfish 3.1.2.2. I am using 2 jars: jna.jar and platform.jar (I tried different versions, last I tried was actually: jna-3.3.0.jar and jna-3.0.0-platform.jar) what I am trying to is to read Windows registry keys. I am also calling other methods from jna.jar (interesting I don't have to include jna.jar in my lib directory inside my ".ear" file, what indicates - it must be allready present somewhere on glassfish. When I searched for it on glassfish directories - I couldn't find it.). Anyways - when I call methods of jna.jar - it is working just fine, when I call methods of platform.jar, first of all I have to deploy that platform.jar in lib directory of my .ear file, secondly - it never works - because I get: ...

java.lang.IllegalAccessError: tried to access method com.sun.jna.Pointer.(J)V from class com.sun.jna.platform.win32.WinReg$HKEY

I have tried anything I could have think of: rebuilding my workspace, renaming jars, including both of them in lib folder of .ear file, including one of them, not including at all, including those jars in glassfish3\glassfish\domains\target\lib\ext, including one or the other in glassfish3\glassfish\domains\target\lib\ext, trying different versions of those 2 jars, nothing worked. I tried using jni4j.jar instead of jna.jar and platform.jar, still didn't help.

Here is actual code, using jna.jar and platform.jar:

    if (Advapi32Util.registryKeyExists(WinReg.HKEY_LOCAL_MACHINE, "SOFTWARE\\CitySyncSafety")) {
        path = Advapi32Util.registryGetStringValue(WinReg.HKEY_LOCAL_MACHINE, "SOFTWARE\\CitySyncSafety", "Path") + File.separator + "DetectEngine";
        logger.warning("POJO path is: " + path);
    } else {
        path = "";
        logger.warning("Else POJO path is: " + path);
    }
    String libPath = System.getProperty("java.library.path");
    if (path != null && !path.equalsIgnoreCase("") && !libPath.contains(path)) {
        logger.warning("Library paths are: " + libPath);
        System.setProperty("java.library.path", System.getProperty("java.library.path") + File.pathSeparator + path);
    }
    if (path != null) {
        //System.loadLibrary(path + File.separator + "cutilityProj1.dll");
    }

It causes that illegal access exception spoken of. When I try to use jni4j.jar with the following code, I do not get any exception, because I do not get anything at all:

    try {
        Reg reg = new Reg("HKEY_LOCAL_MACHINE\\SOFTWARE");
        Reg.Key cp = reg.get("HKEY_LOCAL_MACHINE\\SOFTWARE");
        Reg.Key sound = cp.getChild("CitySyncSafety");
        String p = sound.get("Path");
        path = p  + File.separator + "DetectEngine";;
    } catch (IOException e) {
        if (path == null) {
            path = "";
        }
    }

It just hangs forever on the first line. Please note I have ensured that appropriate key and directories do exist, so we can exclude this issue. I will appreciate any help, as I spent already 2 days on this single issue.

Answer 1

Here is solution :). I can't tell if all the steps are necessary (I mean, I could but I can't be bothered now, while at work). All it takes is to combine jna.jar and platform.jar into 1 jar and place it in glassfish3\glassfish\domains\target\lib and in glassfish3\glassfish\domains\target\lib\ext (actually I bet it is enough to place it in glassfish3\glassfish\domains\target\lib, but I didn't test it).

Well, at least now it works!

Please vote it up, if it helps you.