chenghanpeng/jdk12

jdk12

jdk12's Issues

Unable to Load jar file during plugin startup using JDK 12

I am trying to load a jar file during plugin startup. But unable to load it with JDK 12 or later version.
below is the code snippet :
-------------------------------------CODE---------------------------------------------------
URLClassLoader urlSysLoader = new URLClassLoader(new URL[] {url}, sysLoader);
Method method = sysClass.getDeclaredMethod("addURL", parameters);
/**

The addURL() appends the specified URL to the list of URLs to search for
classes and resources. and since this Method is Protected and we are not inheriting
i'm forced to make it visible.
*/
method.setAccessible(true);
// Invoke addURL method with jar URL to add the classes to URL ClassLoader
method.invoke(urlSysLoader, new Object[] { url });
Field scl = ClassLoader.class.getDeclaredField("scl");
scl.setAccessible(true);
// Replace the static scl (System Class Loader for running instance) with
// newly created URL ClassLoader (system class loader + jar files loaded)
scl.set(null, urlSysLoader);
-----------------------------------------CODE----------------------------------------------
Getting below error :
----------------------------------------ERROR---------------------------------------------------------------------------------
java.lang.NoSuchFieldException: scl
at java.base/java.lang.Class.getDeclaredField(Class.java:2569)
at com.unisys.tde.core.characterset.OS2200CharSetPlugin.loadCharSetLib(OS2200CharSetPlugin.java:160)
at com.unisys.tde.core.characterset.OS2200CharSetPlugin$1.run(OS2200CharSetPlugin.java:66)
----------------------------------------ERROR---------------------------------------------------------------------------------

The above code was working till JDK 11 version.

Please let me know any suggestion or any other alternative approach to achieve the same.

Thanks and Regards,
Raghu