1 /* 2 * Copyright (c) 2005, 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 javax.xml.xpath; 27 28 import java.net.URL; 29 import java.security.*; 30 import java.net.*; 31 import java.io.*; 32 import java.util.*; 33 34 /** 35 * This class is duplicated for each JAXP subpackage so keep it in sync. 36 * It is package private and therefore is not exposed as part of the JAXP 37 * API. 38 * 39 * Security related methods that only work on J2SE 1.2 and newer. 40 */ 41 class SecuritySupport { 42 43 getContextClassLoader()44 ClassLoader getContextClassLoader() { 45 return (ClassLoader) 46 AccessController.doPrivileged(new PrivilegedAction() { 47 public Object run() { 48 ClassLoader cl = null; 49 try { 50 cl = Thread.currentThread().getContextClassLoader(); 51 } catch (SecurityException ex) { } 52 return cl; 53 } 54 }); 55 } 56 57 String getSystemProperty(final String propName) { 58 return (String) 59 AccessController.doPrivileged(new PrivilegedAction() { 60 public Object run() { 61 return System.getProperty(propName); 62 } 63 }); 64 } 65 66 FileInputStream getFileInputStream(final File file) 67 throws FileNotFoundException 68 { 69 try { 70 return (FileInputStream) 71 AccessController.doPrivileged(new PrivilegedExceptionAction() { 72 public Object run() throws FileNotFoundException { 73 return new FileInputStream(file); 74 } 75 }); 76 } catch (PrivilegedActionException e) { 77 throw (FileNotFoundException)e.getException(); 78 } 79 } 80 81 InputStream getURLInputStream(final URL url) 82 throws IOException 83 { 84 try { 85 return (InputStream) 86 AccessController.doPrivileged(new PrivilegedExceptionAction() { 87 public Object run() throws IOException { 88 return url.openStream(); 89 } 90 }); 91 } catch (PrivilegedActionException e) { 92 throw (IOException)e.getException(); 93 } 94 } 95 96 URL getResourceAsURL(final ClassLoader cl, 97 final String name) 98 { 99 return (URL) 100 AccessController.doPrivileged(new PrivilegedAction() { 101 public Object run() { 102 URL url; 103 if (cl == null) { 104 url = Object.class.getResource(name); 105 } else { 106 url = cl.getResource(name); 107 } 108 return url; 109 } 110 }); 111 } 112 113 Enumeration getResources(final ClassLoader cl, 114 final String name) throws IOException 115 { 116 try{ 117 return (Enumeration) 118 AccessController.doPrivileged(new PrivilegedExceptionAction() { 119 public Object run() throws IOException{ 120 Enumeration enumeration; 121 if (cl == null) { 122 enumeration = ClassLoader.getSystemResources(name); 123 } else { 124 enumeration = cl.getResources(name); 125 } 126 return enumeration; 127 } 128 }); 129 }catch(PrivilegedActionException e){ 130 throw (IOException)e.getException(); 131 } 132 } 133 134 InputStream getResourceAsStream(final ClassLoader cl, 135 final String name) 136 { 137 return (InputStream) 138 AccessController.doPrivileged(new PrivilegedAction() { 139 public Object run() { 140 InputStream ris; 141 if (cl == null) { 142 ris = Object.class.getResourceAsStream(name); 143 } else { 144 ris = cl.getResourceAsStream(name); 145 } 146 return ris; 147 } 148 }); 149 } 150 151 boolean doesFileExist(final File f) { 152 return ((Boolean) 153 AccessController.doPrivileged(new PrivilegedAction() { 154 public Object run() { 155 return new Boolean(f.exists()); 156 } 157 })).booleanValue(); 158 } 159 160 } 161