student.testingsupport

Class ExitPreventingSecurityManager

java.lang.Object

java.lang.SecurityManager

student.testingsupport.ExitPreventingSecurityManager

public class ExitPreventingSecurityManager
extends SecurityManager

A custom security manager used by TestCase to detect and report calls to System.exit() without actually terminating the JVM. With this security manager in place, any call to System.exit() will be turned into a ExitCalledException.

This security manager is designed to work in conjunction with any other security manager currently installed. It chains to an existing security manager and delegates all checks other than System.exit() checks to the other manager. This way it can easily be "added" on top of a sandboxing security manager without requiring that manager to be rewritten.

Version:

$Revision: 1.2 $, $Date: 2013/08/24 18:49:44 $

Author:

Stephen Edwards, Last changed by $Author: stedwar2 $

Field Summary

Fields inherited from class java.lang.SecurityManager

inCheck

Constructor Summary

Constructors

Constructor and Description
ExitPreventingSecurityManager(SecurityManager parent) Create a new manager with the given security manager as its "parent".

Method Summary

Modifier and Type	Method and Description
void	checkExit(int status)
void	checkPermission(Permission perm)
void	checkPermission(Permission perm, Object context)
static void	install() Install a new instance of this class as the current security manager, taking any existing security manager and using it as the parent to chain to.
static void	uninstall() If the current security manager is an instance of this class, uninstall it and replace it with its parent, if any.

Methods inherited from class java.lang.SecurityManager

checkAccept, checkAccess, checkAccess, checkAwtEventQueueAccess, checkConnect, checkConnect, checkCreateClassLoader, checkDelete, checkExec, checkLink, checkListen, checkMemberAccess, checkMulticast, checkMulticast, checkPackageAccess, checkPackageDefinition, checkPrintJobAccess, checkPropertiesAccess, checkPropertyAccess, checkRead, checkRead, checkRead, checkSecurityAccess, checkSetFactory, checkSystemClipboardAccess, checkTopLevelWindow, checkWrite, checkWrite, classDepth, classLoaderDepth, currentClassLoader, currentLoadedClass, getClassContext, getInCheck, getSecurityContext, getThreadGroup, inClass, inClassLoader

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExitPreventingSecurityManager

public ExitPreventingSecurityManager(SecurityManager parent)

Create a new manager with the given security manager as its "parent". All checks other than System.exit() checks will be delegated to the parent, if one is provided.

Parameters:

parent - The security manager to chain to (delegate to) for all other checks besides System.exit() calls.

Method Detail

checkPermission

public void checkPermission(Permission perm)

Overrides:

checkPermission in class SecurityManager

checkPermission

public void checkPermission(Permission perm,
                            Object context)

Overrides:

checkPermission in class SecurityManager

checkExit

public void checkExit(int status)

Overrides:

checkExit in class SecurityManager

install

public static void install()

Install a new instance of this class as the current security manager, taking any existing security manager and using it as the parent to chain to.

uninstall

public static void uninstall()

If the current security manager is an instance of this class, uninstall it and replace it with its parent, if any.