jaxp/src/org/xml/sax/helpers/SecuritySupport.java
changeset 16953 a44e04deb948
child 22139 f4b2aa462b46
equal deleted inserted replaced
16416:bcebd3fdefc9 16953:a44e04deb948
       
     1 /*
       
     2  * Copyright (c) 2004, 2006, 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 org.xml.sax.helpers;
       
    27 
       
    28 import java.io.*;
       
    29 import 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  */
       
    38 class SecuritySupport  {
       
    39 
       
    40 
       
    41     ClassLoader getContextClassLoader() throws SecurityException{
       
    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 
       
    50                 if (cl == null)
       
    51                     cl = ClassLoader.getSystemClassLoader();
       
    52 
       
    53                 return cl;
       
    54             }
       
    55         });
       
    56     }
       
    57 
       
    58     String getSystemProperty(final String propName) {
       
    59         return (String)
       
    60             AccessController.doPrivileged(new PrivilegedAction() {
       
    61                 public Object run() {
       
    62                     return System.getProperty(propName);
       
    63                 }
       
    64             });
       
    65     }
       
    66 
       
    67     FileInputStream getFileInputStream(final File file)
       
    68         throws FileNotFoundException
       
    69     {
       
    70         try {
       
    71             return (FileInputStream)
       
    72                 AccessController.doPrivileged(new PrivilegedExceptionAction() {
       
    73                     public Object run() throws FileNotFoundException {
       
    74                         return new FileInputStream(file);
       
    75                     }
       
    76                 });
       
    77         } catch (PrivilegedActionException e) {
       
    78             throw (FileNotFoundException)e.getException();
       
    79         }
       
    80     }
       
    81 
       
    82     InputStream getResourceAsStream(final ClassLoader cl,
       
    83                                            final String name)
       
    84     {
       
    85         return (InputStream)
       
    86             AccessController.doPrivileged(new PrivilegedAction() {
       
    87                 public Object run() {
       
    88                     InputStream ris;
       
    89                     if (cl == null) {
       
    90                         ris = Object.class.getResourceAsStream(name);
       
    91                     } else {
       
    92                         ris = cl.getResourceAsStream(name);
       
    93                     }
       
    94                     return ris;
       
    95                 }
       
    96             });
       
    97     }
       
    98 
       
    99     boolean doesFileExist(final File f) {
       
   100     return ((Boolean)
       
   101             AccessController.doPrivileged(new PrivilegedAction() {
       
   102                 public Object run() {
       
   103                     return new Boolean(f.exists());
       
   104                 }
       
   105             })).booleanValue();
       
   106     }
       
   107 
       
   108 }