1/*
2 * Copyright (c) 2005, 2017, 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 javax.xml.datatype;
27
28import java.security.*;
29import java.io.*;
30
31/**
32 * This class is duplicated for each JAXP subpackage so keep it in sync.
33 * It is package private and therefore is not exposed as part of the JAXP
34 * API.
35 *
36 * Security related methods that only work on J2SE 1.2 and newer.
37 */
38class SecuritySupport  {
39
40
41    ClassLoader getContextClassLoader() {
42        return (ClassLoader)
43                AccessController.doPrivileged(new PrivilegedAction() {
44            public Object run() {
45                ClassLoader cl = null;
46                try {
47                    cl = Thread.currentThread().getContextClassLoader();
48                } catch (SecurityException ex) { }
49                return cl;
50            }
51        });
52    }
53
54    String getSystemProperty(final String propName) {
55        return (String)
56            AccessController.doPrivileged(new PrivilegedAction() {
57                public Object run() {
58                    return System.getProperty(propName);
59                }
60            });
61    }
62
63    FileInputStream getFileInputStream(final File file)
64        throws FileNotFoundException
65    {
66        try {
67            return (FileInputStream)
68                AccessController.doPrivileged(new PrivilegedExceptionAction() {
69                    public Object run() throws FileNotFoundException {
70                        return new FileInputStream(file);
71                    }
72                });
73        } catch (PrivilegedActionException e) {
74            throw (FileNotFoundException)e.getException();
75        }
76    }
77
78    boolean doesFileExist(final File f) {
79    return ((Boolean)
80            AccessController.doPrivileged(new PrivilegedAction() {
81                public Object run() {
82                    return f.exists();
83                }
84            })).booleanValue();
85    }
86
87}
88