javax.activation.SecuritySupport Maven / Gradle / Ivy
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package javax.activation;
import java.security.*;
import java.net.*;
import java.io.*;
import java.util.*;
/**
* Security related methods that only work on J2SE 1.2 and newer.
*/
class SecuritySupport {
private SecuritySupport() {
// private constructor, can't create an instance
}
public 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;
}
});
}
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();
}
}
public static URL[] getResources(final ClassLoader cl, final String name) {
return (URL[])
AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
URL[] ret = null;
try {
List v = new ArrayList();
Enumeration e = cl.getResources(name);
while (e != null && e.hasMoreElements()) {
URL url = (URL)e.nextElement();
if (url != null)
v.add(url);
}
if (v.size() > 0) {
ret = new URL[v.size()];
ret = (URL[])v.toArray(ret);
}
} catch (IOException ioex) {
} catch (SecurityException ex) { }
return ret;
}
});
}
public static URL[] getSystemResources(final String name) {
return (URL[])
AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
URL[] ret = null;
try {
List v = new ArrayList();
Enumeration e = ClassLoader.getSystemResources(name);
while (e != null && e.hasMoreElements()) {
URL url = (URL)e.nextElement();
if (url != null)
v.add(url);
}
if (v.size() > 0) {
ret = new URL[v.size()];
ret = (URL[])v.toArray(ret);
}
} catch (IOException ioex) {
} catch (SecurityException ex) { }
return ret;
}
});
}
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();
}
}
}