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package com.sun.enterprise.security;

import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;

/**
 * This class provides an optimization for some methods in
 * java.security.AccessController.
 * @author Shing Wai Chan
 */
public final class AppservAccessController {
    private static boolean isSecMgrOff = (System.getSecurityManager() == null);

    private AppservAccessController() {
    }

    public static Object doPrivileged(PrivilegedAction action) {
        if (isSecMgrOff) {
            return action.run();
        } else {
            return AccessController.doPrivileged(action);
        }
    }

    public static Object doPrivileged(PrivilegedExceptionAction action)
             throws PrivilegedActionException {

        if (isSecMgrOff) {
            try {
                return action.run();       
            } catch(Exception e) {
                throw new PrivilegedActionException(e);
            }
        } else {
            return AccessController.doPrivileged(action);
        }
    }
}