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
26package com.sun.tools.internal.xjc;
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 */
34class 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    static void setContextClassLoader(final ClassLoader cl) {
76        if (System.getSecurityManager() == null) {
77            Thread.currentThread().setContextClassLoader(cl);
78        } else {
79            java.security.AccessController.doPrivileged(
80                    new java.security.PrivilegedAction<ClassLoader>() {
81                        public ClassLoader run() {
82                            Thread.currentThread().setContextClassLoader(cl);
83                            return null;
84                        }
85                    });
86        }
87    }
88
89    static ClassLoader getParentClassLoader(final ClassLoader cl) {
90        if (System.getSecurityManager() == null) {
91            return cl.getParent();
92        } else {
93            return java.security.AccessController.doPrivileged(
94                    new java.security.PrivilegedAction<ClassLoader>() {
95                        public ClassLoader run() {
96                            return cl.getParent();
97                        }
98                    });
99        }
100    }
101
102
103}
104