org.jboss.varia.scheduler.TCLActions Maven / Gradle / Ivy
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* as indicated by the @author tags. See the copyright.txt file in the
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*
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* 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,
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* 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.varia.scheduler;
import java.security.PrivilegedAction;
import java.security.AccessController;
/** An encapsulation of thread context class loader PrivilegedAction for
* getting and setting the TCL.
*
* @author [email protected]
* @version $Revision: 81038 $
*/
class TCLActions
{
private static class GetTCLAction implements PrivilegedAction
{
static PrivilegedAction ACTION = new GetTCLAction();
public Object run()
{
ClassLoader loader = Thread.currentThread().getContextClassLoader();
return loader;
}
}
private static class GetClassLoaderAction implements PrivilegedAction
{
Class c;
GetClassLoaderAction(Class c)
{
this.c = c;
}
public Object run()
{
ClassLoader loader = c.getClassLoader();
c = null;
return loader;
}
}
private static class SetTCLAction implements PrivilegedAction
{
ClassLoader loader;
SetTCLAction(ClassLoader loader)
{
this.loader = loader;
}
public Object run()
{
Thread.currentThread().setContextClassLoader(loader);
loader = null;
return null;
}
}
static ClassLoader getContextClassLoader()
{
ClassLoader loader = (ClassLoader) AccessController.doPrivileged(GetTCLAction.ACTION);
return loader;
}
static ClassLoader getClassLoader(Class c)
{
GetClassLoaderAction action = new GetClassLoaderAction(c);
ClassLoader loader = (ClassLoader) AccessController.doPrivileged(action);
return loader;
}
static void setContextClassLoader(ClassLoader loader)
{
PrivilegedAction action = new SetTCLAction(loader);
AccessController.doPrivileged(action);
}
}