1 /*

     2  * Copyright 2004-2006 Sun Microsystems, Inc.  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.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 package javax.xml.parsers;

    27 

    28 import java.security.*;

    29 import java.net.*;

    30 import java.io.*;

    31 import java.util.*;

    32 

    33 /**

    34  * This class is duplicated for each JAXP subpackage so keep it in sync.

    35  * It is package private and therefore is not exposed as part of the JAXP

    36  * API.

    37  *

    38  * Security related methods that only work on J2SE 1.2 and newer.

    39  */

    40 class SecuritySupport  {

    41 

    42 

    43     ClassLoader getContextClassLoader() throws SecurityException{

    44         return (ClassLoader)

    45                 AccessController.doPrivileged(new PrivilegedAction() {

    46             public Object run() {

    47                 ClassLoader cl = null;

    48                 //try {

    49                 cl = Thread.currentThread().getContextClassLoader();

    50                 //} catch (SecurityException ex) { }

    51 

    52                 if (cl == null)

    53                     cl = ClassLoader.getSystemClassLoader();

    54 

    55                 return cl;

    56             }

    57         });

    58     }

    59 

    60     String getSystemProperty(final String propName) {

    61         return (String)

    62             AccessController.doPrivileged(new PrivilegedAction() {

    63                 public Object run() {

    64                     return System.getProperty(propName);

    65                 }

    66             });

    67     }

    68 

    69     FileInputStream getFileInputStream(final File file)

    70         throws FileNotFoundException

    71     {

    72         try {

    73             return (FileInputStream)

    74                 AccessController.doPrivileged(new PrivilegedExceptionAction() {

    75                     public Object run() throws FileNotFoundException {

    76                         return new FileInputStream(file);

    77                     }

    78                 });

    79         } catch (PrivilegedActionException e) {

    80             throw (FileNotFoundException)e.getException();

    81         }

    82     }

    83 

    84     InputStream getResourceAsStream(final ClassLoader cl,

    85                                            final String name)

    86     {

    87         return (InputStream)

    88             AccessController.doPrivileged(new PrivilegedAction() {

    89                 public Object run() {

    90                     InputStream ris;

    91                     if (cl == null) {

    92                         ris = ClassLoader.getSystemResourceAsStream(name);

    93                     } else {

    94                         ris = cl.getResourceAsStream(name);

    95                     }

    96                     return ris;

    97                 }

    98             });

    99     }

   100 

   101     boolean doesFileExist(final File f) {

   102     return ((Boolean)

   103             AccessController.doPrivileged(new PrivilegedAction() {

   104                 public Object run() {

   105                     return new Boolean(f.exists());

   106                 }

   107             })).booleanValue();

   108     }

   109 

   110 }