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 

    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      * 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 }