1/* 2 * Copyright (c) 2005, 2015, 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.xpath; 27 28import java.net.URL; 29import java.security.*; 30import java.io.*; 31 32/** 33 * This class is duplicated for each JAXP subpackage so keep it in sync. 34 * It is package private and therefore is not exposed as part of the JAXP 35 * API. 36 * 37 * Security related methods that only work on J2SE 1.2 and newer. 38 */ 39class SecuritySupport { 40 41 42 ClassLoader getContextClassLoader() { 43 return AccessController.doPrivileged(new PrivilegedAction<>() { 44 @Override 45 public ClassLoader run() { 46 ClassLoader cl = null; 47 try { 48 cl = Thread.currentThread().getContextClassLoader(); 49 } catch (SecurityException ex) { } 50 return cl; 51 } 52 }); 53 } 54 55 String getSystemProperty(final String propName) { 56 return AccessController.doPrivileged(new PrivilegedAction<>() { 57 @Override 58 public String run() { 59 return System.getProperty(propName); 60 } 61 }); 62 } 63 64 FileInputStream getFileInputStream(final File file) 65 throws FileNotFoundException 66 { 67 try { 68 return AccessController.doPrivileged( 69 new PrivilegedExceptionAction<>() { 70 @Override 71 public FileInputStream run() throws FileNotFoundException { 72 return new FileInputStream(file); 73 } 74 }); 75 } catch (PrivilegedActionException e) { 76 throw (FileNotFoundException)e.getException(); 77 } 78 } 79 80 // Used for debugging purposes 81 String getClassSource(Class<?> cls) { 82 return AccessController.doPrivileged(new PrivilegedAction<>() { 83 @Override 84 public String run() { 85 CodeSource cs = cls.getProtectionDomain().getCodeSource(); 86 if (cs != null) { 87 URL loc = cs.getLocation(); 88 return loc != null ? loc.toString() : "(no location)"; 89 } else { 90 return "(no code source)"; 91 } 92 } 93 }); 94 } 95 96 boolean doesFileExist(final File f) { 97 return AccessController.doPrivileged(new PrivilegedAction<>() { 98 @Override 99 public Boolean run() { 100 return f.exists(); 101 } 102 }); 103 } 104 105} 106