public static InputStream openStream(final URL url) throws IOException {
try {
return (InputStream)
AccessController.doPrivileged(
new PrivilegedExceptionAction() {
public Object run() throws IOException {
return url.openStream();
}
});
} catch (PrivilegedActionException e) {
throw (IOException) e.getException();
}
}
public static InputStream getResourceAsStream(final Class c, final String name)
throws IOException {
try {
return (InputStream)
AccessController.doPrivileged(
new PrivilegedExceptionAction() {
public Object run() throws IOException {
return c.getResourceAsStream(name);
}
});
} catch (PrivilegedActionException e) {
throw (IOException) e.getException();
}
}
/** Invoke a method on an object using reflection. */
public static Object invoke(final Object target, final Method method, final Object... args) {
try {
return AccessController.doPrivileged(
new PrivilegedExceptionAction<Object>() {
public Object run() throws IllegalAccessException, InvocationTargetException {
if (!method.isAccessible())
method.setAccessible(
true); // Say please - else invoke() will fail if method is protected
return method.invoke(target, args);
}
});
} catch (PrivilegedActionException e) {
e.printStackTrace();
}
return null;
}