1 /*
   2  * Copyright (c) 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 javax.xml.stream;
  27 
  28 import java.security.*;
  29 import java.io.*;
  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 AccessController.doPrivileged((PrivilegedAction<ClassLoader>) () -> {
  43             ClassLoader cl = Thread.currentThread().getContextClassLoader();
  44 
  45             if (cl == null)
  46                 cl = ClassLoader.getSystemClassLoader();
  47 
  48             return cl;
  49         });
  50     }
  51 
  52     String getSystemProperty(final String propName) {
  53         return AccessController.doPrivileged((PrivilegedAction<String>) () ->
  54                 System.getProperty(propName));
  55     }
  56 
  57     FileInputStream getFileInputStream(final File file)
  58         throws FileNotFoundException
  59     {
  60         try {
  61             return AccessController.doPrivileged((PrivilegedExceptionAction<FileInputStream>) ()
  62                     -> new FileInputStream(file));
  63         } catch (PrivilegedActionException e) {
  64             throw (FileNotFoundException)e.getException();
  65         }
  66     }
  67 
  68     boolean doesFileExist(final File f) {
  69         return AccessController.doPrivileged((PrivilegedAction<Boolean>) () -> f.exists());
  70     }
  71 
  72 }