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/*
* 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 xni;
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.
*
* @xerces.internal
*/
final class 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;
}
});
}
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();
}
}
static InputStream getResourceAsStream(final ClassLoader cl,
final String name)
{
return (InputStream)
AccessController.doPrivileged(new PrivilegedAction() {
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() {
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();
}
private SecuritySupport () {}
}
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