| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 2002-2004 The Apache Software Foundation. |
| * |
| * Licensed 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 com.sun.org.apache.bcel.internal.util; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.FilenameFilter; |
| import java.io.InputStream; |
| import java.lang.ClassLoader; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.security.PrivilegedActionException; |
| import java.security.PrivilegedExceptionAction; |
| import java.util.ListResourceBundle; |
| import java.util.Locale; |
| import java.util.MissingResourceException; |
| import java.util.ResourceBundle; |
| |
| /** |
| * 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. |
| * |
| * @xerces.internal |
| */ |
| public final class SecuritySupport { |
| |
| private static final SecuritySupport securitySupport = new SecuritySupport(); |
| |
| /** |
| * Return an instance of this class. |
| */ |
| public static SecuritySupport getInstance() { |
| return securitySupport; |
| } |
| |
| static ClassLoader getContextClassLoader() { |
| return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() { |
| 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() { |
| 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() { |
| 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; |
| } |
| }); |
| } |
| |
| public static String getSystemProperty(final String propName) { |
| return (String) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| return System.getProperty(propName); |
| } |
| }); |
| } |
| |
| static FileInputStream getFileInputStream(final File file) |
| throws FileNotFoundException { |
| try { |
| return (FileInputStream) AccessController.doPrivileged(new PrivilegedExceptionAction() { |
| public Object run() throws FileNotFoundException { |
| return new FileInputStream(file); |
| } |
| }); |
| } catch (PrivilegedActionException e) { |
| throw (FileNotFoundException) e.getException(); |
| } |
| } |
| |
| /** |
| * Return resource using the same classloader for the ObjectFactory by |
| * default or bootclassloader when Security Manager is in place |
| */ |
| public static InputStream getResourceAsStream(final String name) { |
| if (System.getSecurityManager() != null) { |
| return getResourceAsStream(null, name); |
| } else { |
| return getResourceAsStream(findClassLoader(), name); |
| } |
| } |
| |
| public static InputStream getResourceAsStream(final ClassLoader cl, |
| final String name) { |
| return (InputStream) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| InputStream ris; |
| if (cl == null) { |
| ris = Object.class.getResourceAsStream("/" + name); |
| } else { |
| ris = cl.getResourceAsStream(name); |
| } |
| return ris; |
| } |
| }); |
| } |
| |
| /** |
| * Gets a resource bundle using the specified base name, the default locale, |
| * and the caller's class loader. |
| * |
| * @param bundle the base name of the resource bundle, a fully qualified |
| * class name |
| * @return a resource bundle for the given base name and the default locale |
| */ |
| public static ListResourceBundle getResourceBundle(String bundle) { |
| return getResourceBundle(bundle, Locale.getDefault()); |
| } |
| |
| /** |
| * Gets a resource bundle using the specified base name and locale, and the |
| * caller's class loader. |
| * |
| * @param bundle the base name of the resource bundle, a fully qualified |
| * class name |
| * @param locale the locale for which a resource bundle is desired |
| * @return a resource bundle for the given base name and locale |
| */ |
| public static ListResourceBundle getResourceBundle(final String bundle, final Locale locale) { |
| return AccessController.doPrivileged(new PrivilegedAction<ListResourceBundle>() { |
| public ListResourceBundle run() { |
| try { |
| return (ListResourceBundle) ResourceBundle.getBundle(bundle, locale); |
| } catch (MissingResourceException e) { |
| try { |
| return (ListResourceBundle) ResourceBundle.getBundle(bundle, new Locale("en", "US")); |
| } catch (MissingResourceException e2) { |
| throw new MissingResourceException( |
| "Could not load any resource bundle by " + bundle, bundle, ""); |
| } |
| } |
| } |
| }); |
| } |
| |
| public static String[] getFileList(final File f, final FilenameFilter filter) { |
| return ((String[]) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| return f.list(filter); |
| } |
| })); |
| } |
| |
| public static boolean getFileExists(final File f) { |
| return ((Boolean) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| return f.exists() ? Boolean.TRUE : Boolean.FALSE; |
| } |
| })).booleanValue(); |
| } |
| |
| static long getLastModified(final File f) { |
| return ((Long) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| return new Long(f.lastModified()); |
| } |
| })).longValue(); |
| } |
| |
| |
| /** |
| * Figure out which ClassLoader to use. |
| */ |
| public static ClassLoader findClassLoader() |
| { |
| if (System.getSecurityManager()!=null) { |
| //this will ensure bootclassloader is used |
| return null; |
| } else { |
| return SecuritySupport.class.getClassLoader(); |
| } |
| } // findClassLoader():ClassLoader |
| |
| private SecuritySupport() { |
| } |
| } |