org.jboss.modules.CallerContext Maven / Gradle / Ivy
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* JBoss, Home of Professional Open Source.
* Copyright 2010, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.modules;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* Various methods for obtaining caller info.
*
* @author Jason T. Greene
*/
class CallerContext {
private CallerContext() {
}
private static final class Hack extends SecurityManager {
@Override
protected Class[] getClassContext() {
return super.getClassContext();
}
}
private static Hack hack = AccessController.doPrivileged(new PrivilegedAction() {
@Override
public Hack run() {
return new Hack();
}
});
static Class getCallingClass() {
Class stack[] = hack.getClassContext();
int i = 3;
while (stack[i] == stack[2]) {
// skip nested calls front the same class
if (++i >= stack.length)
return null;
}
return stack[i];
}
}