001 /*
002 * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation. Sun designates this
008 * particular file as subject to the "Classpath" exception as provided
009 * by Sun in the LICENSE file that accompanied this code.
010 *
011 * This code is distributed in the hope that it will be useful, but WITHOUT
012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014 * version 2 for more details (a copy is included in the LICENSE file that
015 * accompanied this code).
016 *
017 * You should have received a copy of the GNU General Public License version
018 * 2 along with this work; if not, write to the Free Software Foundation,
019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020 *
021 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022 * CA 95054 USA or visit www.sun.com if you need additional information or
023 * have any questions.
024 */
025
026 package javax.xml.xpath;
027
028 import java.net.URL;
029 import java.security.*;
030 import java.net.*;
031 import java.io.*;
032 import java.util.*;
033
034 /**
035 * This class is duplicated for each JAXP subpackage so keep it in sync.
036 * It is package private and therefore is not exposed as part of the JAXP
037 * API.
038 *
039 * Security related methods that only work on J2SE 1.2 and newer.
040 */
041 class SecuritySupport {
042
043 ClassLoader getContextClassLoader() {
044 return (ClassLoader) AccessController
045 .doPrivileged(new PrivilegedAction() {
046 public Object run() {
047 ClassLoader cl = null;
048 try {
049 cl = Thread.currentThread()
050 .getContextClassLoader();
051 } catch (SecurityException ex) {
052 }
053 return cl;
054 }
055 });
056 }
057
058 String getSystemProperty(final String propName) {
059 return (String) AccessController
060 .doPrivileged(new PrivilegedAction() {
061 public Object run() {
062 return System.getProperty(propName);
063 }
064 });
065 }
066
067 FileInputStream getFileInputStream(final File file)
068 throws FileNotFoundException {
069 try {
070 return (FileInputStream) AccessController
071 .doPrivileged(new PrivilegedExceptionAction() {
072 public Object run()
073 throws FileNotFoundException {
074 return new FileInputStream(file);
075 }
076 });
077 } catch (PrivilegedActionException e) {
078 throw (FileNotFoundException) e.getException();
079 }
080 }
081
082 InputStream getURLInputStream(final URL url) throws IOException {
083 try {
084 return (InputStream) AccessController
085 .doPrivileged(new PrivilegedExceptionAction() {
086 public Object run() throws IOException {
087 return url.openStream();
088 }
089 });
090 } catch (PrivilegedActionException e) {
091 throw (IOException) e.getException();
092 }
093 }
094
095 URL getResourceAsURL(final ClassLoader cl, final String name) {
096 return (URL) AccessController
097 .doPrivileged(new PrivilegedAction() {
098 public Object run() {
099 URL url;
100 if (cl == null) {
101 url = ClassLoader.getSystemResource(name);
102 } else {
103 url = cl.getResource(name);
104 }
105 return url;
106 }
107 });
108 }
109
110 Enumeration getResources(final ClassLoader cl, final String name)
111 throws IOException {
112 try {
113 return (Enumeration) AccessController
114 .doPrivileged(new PrivilegedExceptionAction() {
115 public Object run() throws IOException {
116 Enumeration enumeration;
117 if (cl == null) {
118 enumeration = ClassLoader
119 .getSystemResources(name);
120 } else {
121 enumeration = cl.getResources(name);
122 }
123 return enumeration;
124 }
125 });
126 } catch (PrivilegedActionException e) {
127 throw (IOException) e.getException();
128 }
129 }
130
131 InputStream getResourceAsStream(final ClassLoader cl,
132 final String name) {
133 return (InputStream) AccessController
134 .doPrivileged(new PrivilegedAction() {
135 public Object run() {
136 InputStream ris;
137 if (cl == null) {
138 ris = ClassLoader
139 .getSystemResourceAsStream(name);
140 } else {
141 ris = cl.getResourceAsStream(name);
142 }
143 return ris;
144 }
145 });
146 }
147
148 boolean doesFileExist(final File f) {
149 return ((Boolean) AccessController
150 .doPrivileged(new PrivilegedAction() {
151 public Object run() {
152 return new Boolean(f.exists());
153 }
154 })).booleanValue();
155 }
156
157 }
|