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 }