Java-Gaming.org Hi !
Featured games (90)
games approved by the League of Dukes
Games in Showcase (767)
Games in Android Showcase (230)
games submitted by our members
Games in WIP (854)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  IllegalAccessError between class loaders  (Read 2732 times)
0 Members and 1 Guest are viewing this topic.
Offline endolf

JGO Coder


Medals: 7
Exp: 15 years


Current project release date: sometime in 3003


« Posted 2007-06-11 20:52:57 »

Hi

I'm dynamically loading classes with a custom class loader (extends URLClassLoader), the trouble is, that some of the classes that are loaded this way, extend classes loaded from the normal class path. When trying to call package/protected utility methods on the base classes, I get IllegalAccessErrors. This is out of my area of knowledge, and google doesn't appear to be playing on this one Smiley. Does anyone know of a way through security managers, or class loader tricks, or something in the meta inf in the jar or anything that will get these classes playing nicely? Smiley

Cheers

Endolf

Offline cylab

JGO Kernel


Medals: 185



« Reply #1 - Posted 2007-06-11 21:05:50 »

If I remember correctly even in the same classloader, package protected methods are not accessable if they are called from within another jar. You may be able to circumvent ths problem by specifying a security.policy file containing a ReflectPermission, but I don't know if you have to call the utility methods via java.lang.reflect:Method. See http://java.sun.com/j2se/1.4.2/docs/guide/security/permissions.html for some details.

Mathias - I Know What [you] Did Last Summer!
Offline kappa
« League of Dukes »

JGO Kernel


Medals: 123
Projects: 15


★★★★★


« Reply #2 - Posted 2007-06-11 22:05:48 »

you should use the same classloader other wise you'll run into that error, however one ugly hack that can suppress the errors is
1  
System.setSecurityManager(null);
Pages: [1]
  ignore  |  Print  
 
 

 
EgonOlsen (1279 views)
2018-06-10 19:43:48

EgonOlsen (1147 views)
2018-06-10 19:43:44

EgonOlsen (881 views)
2018-06-10 19:43:20

DesertCoockie (1291 views)
2018-05-13 18:23:11

nelsongames (1106 views)
2018-04-24 18:15:36

nelsongames (1337 views)
2018-04-24 18:14:32

ivj94 (2077 views)
2018-03-24 14:47:39

ivj94 (1231 views)
2018-03-24 14:46:31

ivj94 (2188 views)
2018-03-24 14:43:53

Solater (798 views)
2018-03-17 05:04:08
Deployment and Packaging
by mudlee
2018-08-22 18:09:50

Java Gaming Resources
by gouessej
2018-08-22 08:19:41

Deployment and Packaging
by gouessej
2018-08-22 08:04:08

Deployment and Packaging
by gouessej
2018-08-22 08:03:45

Deployment and Packaging
by philfrei
2018-08-20 02:33:38

Deployment and Packaging
by philfrei
2018-08-20 02:29:55

Deployment and Packaging
by philfrei
2018-08-19 23:56:20

Deployment and Packaging
by philfrei
2018-08-19 23:54:46
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!