1 /*
   2  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.xml.internal.bind.v2.model.nav;
  27 
  28 /**
  29  * Class defined for safe calls of getClassLoader methods of any kind (context/system/class
  30  * classloader. This MUST be package private and defined in every package which
  31  * uses such invocations.
  32  * @author snajper
  33  */
  34 class SecureLoader {
  35 
  36     static ClassLoader getContextClassLoader() {
  37         if (System.getSecurityManager() == null) {
  38             return Thread.currentThread().getContextClassLoader();
  39         } else {
  40             return java.security.AccessController.doPrivileged(
  41                     new java.security.PrivilegedAction<ClassLoader>() {
  42                         public ClassLoader run() {
  43                             return Thread.currentThread().getContextClassLoader();
  44                         }
  45                     });
  46         }
  47     }
  48 
  49     static ClassLoader getClassClassLoader(final Class c) {
  50         if (System.getSecurityManager() == null) {
  51             return c.getClassLoader();
  52         } else {
  53             return java.security.AccessController.doPrivileged(
  54                     new java.security.PrivilegedAction<ClassLoader>() {
  55                         public ClassLoader run() {
  56                             return c.getClassLoader();
  57                         }
  58                     });
  59         }
  60     }
  61 
  62     static ClassLoader getSystemClassLoader() {
  63         if (System.getSecurityManager() == null) {
  64             return ClassLoader.getSystemClassLoader();
  65         } else {
  66             return java.security.AccessController.doPrivileged(
  67                     new java.security.PrivilegedAction<ClassLoader>() {
  68                         public ClassLoader run() {
  69                             return ClassLoader.getSystemClassLoader();
  70                         }
  71                     });
  72         }
  73     }
  74 
  75 }