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