content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   * 
   *      http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package mf.org.apache.html.dom;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.InputStream;
  import java.security.AccessController;
  import java.security.PrivilegedAction;
  import java.security.PrivilegedActionException;
  import java.security.PrivilegedExceptionAction;
  
  /**
   * This class is duplicated for each subpackage so keep it in sync.
   * It is package private and therefore is not exposed as part of any API.
   *
   * @version $Id: SecuritySupport.java 950361 2010-06-02 04:12:35Z mrglavas $
   * @xerces.internal
   */
  final class SecuritySupport {
  
      private SecuritySupport() {
      }
  
      static ClassLoader getContextClassLoader() {
          return (ClassLoader)
                  AccessController.doPrivileged(new PrivilegedAction() {
                      @Override
                      public Object run() {
                          ClassLoader cl = null;
                          try {
                              cl = Thread.currentThread().getContextClassLoader();
                          } catch (SecurityException ex) {
                          }
                          return cl;
                      }
                  });
      }
  
      static ClassLoader getSystemClassLoader() {
          return (ClassLoader)
                  AccessController.doPrivileged(new PrivilegedAction() {
                      @Override
                      public Object run() {
                          ClassLoader cl = null;
                          try {
                              cl = ClassLoader.getSystemClassLoader();
                          } catch (SecurityException ex) {
                          }
                          return cl;
                      }
                  });
      }
  
      static ClassLoader getParentClassLoader(final ClassLoader cl) {
          return (ClassLoader)
                  AccessController.doPrivileged(new PrivilegedAction() {
                      @Override
                      public Object run() {
                          ClassLoader parent = null;
                          try {
                              parent = cl.getParent();
                          } catch (SecurityException ex) {
                          }
  
                          // eliminate loops in case of the boot
                          // ClassLoader returning itself as a parent
                          return (parent == cl) ? null : parent;
                      }
                  });
      }
  
      static String getSystemProperty(final String propName) {
          return (String)
                  AccessController.doPrivileged(new PrivilegedAction() {
                      @Override
                      public Object run() {
                          return System.getProperty(propName);
                      }
                  });
      }
  
      static FileInputStream getFileInputStream(final File file)
              throws FileNotFoundException {
          try {
              return (FileInputStream)
                      AccessController.doPrivileged(new PrivilegedExceptionAction() {
                          @Override
                          public Object run() throws FileNotFoundException {
                              return new FileInputStream(file);
                          }
                      });
          } catch (PrivilegedActionException e) {
              throw (FileNotFoundException) e.getException();
          }
      }
  
      static InputStream getResourceAsStream(final ClassLoader cl,
                                             final String name) {
          return (InputStream)
                  AccessController.doPrivileged(new PrivilegedAction() {
                      @Override
                      public Object run() {
                          InputStream ris;
                          if (cl == null) {
                              ris = ClassLoader.getSystemResourceAsStream(name);
                          } else {
                              ris = cl.getResourceAsStream(name);
                          }
                          return ris;
                      }
                  });
      }
  
      static boolean getFileExists(final File f) {
          return ((Boolean)
                  AccessController.doPrivileged(new PrivilegedAction() {
                      @Override
                      public Object run() {
                          return f.exists() ? Boolean.TRUE : Boolean.FALSE;
                      }
                  })).booleanValue();
      }
  
      static long getLastModified(final File f) {
          return ((Long)
                  AccessController.doPrivileged(new PrivilegedAction() {
                      @Override
                      public Object run() {
                          return new Long(f.lastModified());
                      }
                  })).longValue();
      }
  }
  