1/* 2 * Copyright (c) 2004, 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 org.xml.sax.helpers; 27 28import java.io.*; 29import java.security.*; 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 * Returns the current thread's context class loader, or the system class loader 42 * if the context class loader is null. 43 * @return the current thread's context class loader, or the system class loader 44 * @throws SecurityException 45 */ 46 ClassLoader getClassLoader() throws SecurityException{ 47 return AccessController.doPrivileged((PrivilegedAction<ClassLoader>)() -> { 48 ClassLoader cl = Thread.currentThread().getContextClassLoader(); 49 if (cl == null) { 50 cl = ClassLoader.getSystemClassLoader(); 51 } 52 53 return cl; 54 }); 55 } 56 57 String getSystemProperty(final String propName) { 58 return AccessController.doPrivileged((PrivilegedAction<String>)() 59 -> System.getProperty(propName)); 60 } 61 62 FileInputStream getFileInputStream(final File file) 63 throws FileNotFoundException 64 { 65 try { 66 return AccessController.doPrivileged((PrivilegedExceptionAction<FileInputStream>)() -> 67 new FileInputStream(file)); 68 } catch (PrivilegedActionException e) { 69 throw (FileNotFoundException)e.getException(); 70 } 71 } 72 73 74 InputStream getResourceAsStream(final ClassLoader cl, final String name) 75 { 76 return AccessController.doPrivileged((PrivilegedAction<InputStream>) () -> { 77 InputStream ris; 78 if (cl == null) { 79 ris = SecuritySupport.class.getResourceAsStream(name); 80 } else { 81 ris = cl.getResourceAsStream(name); 82 } 83 return ris; 84 }); 85 } 86 87 boolean doesFileExist(final File f) { 88 return (AccessController.doPrivileged((PrivilegedAction<Boolean>)() -> 89 f.exists())); 90 } 91 92} 93