aoqi@0: /*
aoqi@0:  * Copyright (c) 2002, 2005, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package javax.activation;
aoqi@0: 
aoqi@0: import java.security.*;
aoqi@0: import java.net.*;
aoqi@0: import java.io.*;
aoqi@0: import java.util.*;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * Security related methods that only work on J2SE 1.2 and newer.
aoqi@0:  *
aoqi@0:  * @since 1.6
aoqi@0:  */
aoqi@0: class SecuritySupport {
aoqi@0: 
aoqi@0:     private SecuritySupport() {
aoqi@0:         // private constructor, can't create an instance
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static ClassLoader getContextClassLoader() {
aoqi@0:         return (ClassLoader)
aoqi@0:                 AccessController.doPrivileged(new PrivilegedAction() {
aoqi@0:             public Object run() {
aoqi@0:                 ClassLoader cl = null;
aoqi@0:                 try {
aoqi@0:                     cl = Thread.currentThread().getContextClassLoader();
aoqi@0:                 } catch (SecurityException ex) { }
aoqi@0:                 return cl;
aoqi@0:             }
aoqi@0:         });
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static InputStream getResourceAsStream(final Class c,
aoqi@0:                                 final String name) throws IOException {
aoqi@0:         try {
aoqi@0:             return (InputStream)
aoqi@0:                 AccessController.doPrivileged(new PrivilegedExceptionAction() {
aoqi@0:                     public Object run() throws IOException {
aoqi@0:                         return c.getResourceAsStream(name);
aoqi@0:                     }
aoqi@0:                 });
aoqi@0:         } catch (PrivilegedActionException e) {
aoqi@0:             throw (IOException)e.getException();
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static URL[] getResources(final ClassLoader cl, final String name) {
aoqi@0:         return (URL[])
aoqi@0:                 AccessController.doPrivileged(new PrivilegedAction() {
aoqi@0:             public Object run() {
aoqi@0:                 URL[] ret = null;
aoqi@0:                 try {
aoqi@0:                     List v = new ArrayList();
aoqi@0:                     Enumeration e = cl.getResources(name);
aoqi@0:                     while (e != null && e.hasMoreElements()) {
aoqi@0:                         URL url = (URL)e.nextElement();
aoqi@0:                         if (url != null)
aoqi@0:                             v.add(url);
aoqi@0:                     }
aoqi@0:                     if (v.size() > 0) {
aoqi@0:                         ret = new URL[v.size()];
aoqi@0:                         ret = (URL[])v.toArray(ret);
aoqi@0:                     }
aoqi@0:                 } catch (IOException ioex) {
aoqi@0:                 } catch (SecurityException ex) { }
aoqi@0:                 return ret;
aoqi@0:             }
aoqi@0:         });
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static URL[] getSystemResources(final String name) {
aoqi@0:         return (URL[])
aoqi@0:                 AccessController.doPrivileged(new PrivilegedAction() {
aoqi@0:             public Object run() {
aoqi@0:                 URL[] ret = null;
aoqi@0:                 try {
aoqi@0:                     List v = new ArrayList();
aoqi@0:                     Enumeration e = ClassLoader.getSystemResources(name);
aoqi@0:                     while (e != null && e.hasMoreElements()) {
aoqi@0:                         URL url = (URL)e.nextElement();
aoqi@0:                         if (url != null)
aoqi@0:                             v.add(url);
aoqi@0:                     }
aoqi@0:                     if (v.size() > 0) {
aoqi@0:                         ret = new URL[v.size()];
aoqi@0:                         ret = (URL[])v.toArray(ret);
aoqi@0:                     }
aoqi@0:                 } catch (IOException ioex) {
aoqi@0:                 } catch (SecurityException ex) { }
aoqi@0:                 return ret;
aoqi@0:             }
aoqi@0:         });
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static InputStream openStream(final URL url) throws IOException {
aoqi@0:         try {
aoqi@0:             return (InputStream)
aoqi@0:                 AccessController.doPrivileged(new PrivilegedExceptionAction() {
aoqi@0:                     public Object run() throws IOException {
aoqi@0:                         return url.openStream();
aoqi@0:                     }
aoqi@0:                 });
aoqi@0:         } catch (PrivilegedActionException e) {
aoqi@0:             throw (IOException)e.getException();
aoqi@0:         }
aoqi@0:     }
aoqi@0: }