Field Detail

• inCheck

  @Deprecated
  protected boolean inCheck

  Deprecated. This type of security checking is not recommended. It is recommended that the checkPermission call be used instead.
  This field is true if there is a security check in progress; false otherwise.

Constructor Detail

• SecurityManager

  public SecurityManager()

  Constructs a new SecurityManager.

  If there is a security manager already installed, this method first calls the security manager's checkPermission method with the RuntimePermission("createSecurityManager") permission to ensure the calling thread has permission to create a new security manager. This may result in throwing a SecurityException.

  Throws:

  SecurityException - if a security manager already exists and its checkPermission method doesn't allow creation of a new security manager.

  See Also:

  System.getSecurityManager(), checkPermission, RuntimePermission

Method Detail

• getInCheck

  @Deprecated
  public boolean getInCheck()

  Deprecated. This type of security checking is not recommended. It is recommended that the checkPermission call be used instead.
  Tests if there is a security check in progress.

  Returns:

  the value of the inCheck field. This field should contain true if a security check is in progress, false otherwise.

  See Also:

  inCheck

• getClassContext

  protected Class[] getClassContext()

  Returns the current execution stack as an array of classes.

  The length of the array is the number of methods on the execution stack. The element at index 0 is the class of the currently executing method, the element at index 1 is the class of that method's caller, and so on.

  Returns:

  the execution stack.

• currentClassLoader

  @Deprecated
  protected ClassLoader currentClassLoader()

  Deprecated. This type of security checking is not recommended. It is recommended that the checkPermission call be used instead.
  Returns the class loader of the most recently executing method from a class defined using a non-system class loader. A non-system class loader is defined as being a class loader that is not equal to the system class loader (as returned by ClassLoader.getSystemClassLoader()) or one of its ancestors.

  This method will return null in the following three cases:

  1. All methods on the execution stack are from classes defined using the system class loader or one of its ancestors.
  2. All methods on the execution stack up to the first "privileged" caller (see AccessController.doPrivileged(java.security.PrivilegedAction<T>)) are from classes defined using the system class loader or one of its ancestors.
  3. A call to checkPermission with java.security.AllPermission does not result in a SecurityException.

  Returns:

  the class loader of the most recent occurrence on the stack of a method from a class defined using a non-system class loader.

  See Also:

  getSystemClassLoader, checkPermission

• currentLoadedClass

  @Deprecated
  protected Class<?> currentLoadedClass()

  Deprecated. This type of security checking is not recommended. It is recommended that the checkPermission call be used instead.
  Returns the class of the most recently executing method from a class defined using a non-system class loader. A non-system class loader is defined as being a class loader that is not equal to the system class loader (as returned by ClassLoader.getSystemClassLoader()) or one of its ancestors.

  This method will return null in the following three cases:

  1. All methods on the execution stack are from classes defined using the system class loader or one of its ancestors.
  2. All methods on the execution stack up to the first "privileged" caller (see AccessController.doPrivileged(java.security.PrivilegedAction<T>)) are from classes defined using the system class loader or one of its ancestors.
  3. A call to checkPermission with java.security.AllPermission does not result in a SecurityException.

  Returns:

  the class of the most recent occurrence on the stack of a method from a class defined using a non-system class loader.

  See Also:

  getSystemClassLoader, checkPermission

• classDepth

  @Deprecated
  protected int classDepth(String name)

  Deprecated. This type of security checking is not recommended. It is recommended that the checkPermission call be used instead.
  Returns the stack depth of the specified class.

  Parameters:

  name - the fully qualified name of the class to search for.

  Returns:

  the depth on the stack frame of the first occurrence of a method from a class with the specified name; -1 if such a frame cannot be found.

• classLoaderDepth

  @Deprecated
  protected int classLoaderDepth()

  Deprecated. This type of security checking is not recommended. It is recommended that the checkPermission call be used instead.
  Returns the stack depth of the most recently executing method from a class defined using a non-system class loader. A non-system class loader is defined as being a class loader that is not equal to the system class loader (as returned by ClassLoader.getSystemClassLoader()) or one of its ancestors.

  This method will return -1 in the following three cases:

  1. All methods on the execution stack are from classes defined using the system class loader or one of its ancestors.
  2. All methods on the execution stack up to the first "privileged" caller (see AccessController.doPrivileged(java.security.PrivilegedAction<T>)) are from classes defined using the system class loader or one of its ancestors.
  3. A call to checkPermission with java.security.AllPermission does not result in a SecurityException.

  Returns:

  the depth on the stack frame of the most recent occurrence of a method from a class defined using a non-system class loader.

  See Also:

  getSystemClassLoader, checkPermission

• inClass

  @Deprecated
  protected boolean inClass(String name)

  Deprecated. This type of security checking is not recommended. It is recommended that the checkPermission call be used instead.
  Tests if a method from a class with the specified name is on the execution stack.

  Parameters:

  name - the fully qualified name of the class.

  Returns:

  true if a method from a class with the specified name is on the execution stack; false otherwise.

• inClassLoader

  @Deprecated
  protected boolean inClassLoader()

  Deprecated. This type of security checking is not recommended. It is recommended that the checkPermission call be used instead.
  Basically, tests if a method from a class defined using a class loader is on the execution stack.

  Returns:

  true if a call to currentClassLoader has a non-null return value.

  See Also:

  currentClassLoader

• getSecurityContext

  public Object getSecurityContext()

  Creates an object that encapsulates the current execution environment. The result of this method is used, for example, by the three-argument checkConnect method and by the two-argument checkRead method. These methods are needed because a trusted method may be called on to read a file or open a socket on behalf of another method. The trusted method needs to determine if the other (possibly untrusted) method would be allowed to perform the operation on its own.

  The default implementation of this method is to return an AccessControlContext object.

  Returns:

  an implementation-dependent object that encapsulates sufficient information about the current execution environment to perform some security checks later.

  See Also:

  checkConnect, checkRead, AccessControlContext

• checkPermission

  public void checkPermission(Permission perm)

  Throws a SecurityException if the requested access, specified by the given permission, is not permitted based on the security policy currently in effect.

  This method calls AccessController.checkPermission with the given permission.

  Parameters:

  perm - the requested permission.

  Throws:

  SecurityException - if access is not permitted based on the current security policy.

  NullPointerException - if the permission argument is null.

  Since:

  1.2

• checkPermission

  public void checkPermission(Permission perm,
                              Object context)

  Throws a SecurityException if the specified security context is denied access to the resource specified by the given permission. The context must be a security context returned by a previous call to getSecurityContext and the access control decision is based upon the configured security policy for that security context.

  If context is an instance of AccessControlContext then the AccessControlContext.checkPermission method is invoked with the specified permission.

  If context is not an instance of AccessControlContext then a SecurityException is thrown.

  Parameters:

  perm - the specified permission

  context - a system-dependent security context.

  Throws:

  SecurityException - if the specified security context is not an instance of AccessControlContext (e.g., is null), or is denied access to the resource specified by the given permission.

  NullPointerException - if the permission argument is null.

  Since:

  1.2

  See Also:

  getSecurityContext(), AccessControlContext.checkPermission(java.security.Permission)

• checkCreateClassLoader

  public void checkCreateClassLoader()

  Throws a SecurityException if the calling thread is not allowed to create a new class loader.

  This method calls checkPermission with the RuntimePermission("createClassLoader") permission.

  If you override this method, then you should make a call to super.checkCreateClassLoader at the point the overridden method would normally throw an exception.

  Throws:

  SecurityException - if the calling thread does not have permission to create a new class loader.

  See Also:

  ClassLoader.ClassLoader(), checkPermission

• checkAccess

  public void checkAccess(Thread t)

  Throws a SecurityException if the calling thread is not allowed to modify the thread argument.

  This method is invoked for the current security manager by the stop, suspend, resume, setPriority, setName, and setDaemon methods of class Thread.

  If the thread argument is a system thread (belongs to the thread group with a null parent) then this method calls checkPermission with the RuntimePermission("modifyThread") permission. If the thread argument is not a system thread, this method just returns silently.

  Applications that want a stricter policy should override this method. If this method is overridden, the method that overrides it should additionally check to see if the calling thread has the RuntimePermission("modifyThread") permission, and if so, return silently. This is to ensure that code granted that permission (such as the JDK itself) is allowed to manipulate any thread.

  If this method is overridden, then super.checkAccess should be called by the first statement in the overridden method, or the equivalent security check should be placed in the overridden method.

  Parameters:

  t - the thread to be checked.

  Throws:

  SecurityException - if the calling thread does not have permission to modify the thread.

  NullPointerException - if the thread argument is null.

  See Also:

  resume, setDaemon, setName, setPriority, stop, suspend, checkPermission

• checkAccess

  public void checkAccess(ThreadGroup g)

  Throws a SecurityException if the calling thread is not allowed to modify the thread group argument.

  This method is invoked for the current security manager when a new child thread or child thread group is created, and by the setDaemon, setMaxPriority, stop, suspend, resume, and destroy methods of class ThreadGroup.

  If the thread group argument is the system thread group ( has a null parent) then this method calls checkPermission with the RuntimePermission("modifyThreadGroup") permission. If the thread group argument is not the system thread group, this method just returns silently.

  Applications that want a stricter policy should override this method. If this method is overridden, the method that overrides it should additionally check to see if the calling thread has the RuntimePermission("modifyThreadGroup") permission, and if so, return silently. This is to ensure that code granted that permission (such as the JDK itself) is allowed to manipulate any thread.

  If this method is overridden, then super.checkAccess should be called by the first statement in the overridden method, or the equivalent security check should be placed in the overridden method.

  Parameters:

  g - the thread group to be checked.

  Throws:

  SecurityException - if the calling thread does not have permission to modify the thread group.

  NullPointerException - if the thread group argument is null.

  See Also:

  destroy, resume, setDaemon, setMaxPriority, stop, suspend, checkPermission

• checkExit

  public void checkExit(int status)

  Throws a SecurityException if the calling thread is not allowed to cause the Java Virtual Machine to halt with the specified status code.

  This method is invoked for the current security manager by the exit method of class Runtime. A status of 0 indicates success; other values indicate various errors.

  This method calls checkPermission with the RuntimePermission("exitVM."+status) permission.

  If you override this method, then you should make a call to super.checkExit at the point the overridden method would normally throw an exception.

  Parameters:

  status - the exit status.

  Throws:

  SecurityException - if the calling thread does not have permission to halt the Java Virtual Machine with the specified status.

  See Also:

  exit, checkPermission

• checkExec

  public void checkExec(String cmd)

  Throws a SecurityException if the calling thread is not allowed to create a subprocess.

  This method is invoked for the current security manager by the exec methods of class Runtime.

  This method calls checkPermission with the FilePermission(cmd,"execute") permission if cmd is an absolute path, otherwise it calls checkPermission with FilePermission("<<ALL FILES>>","execute") .

  If you override this method, then you should make a call to super.checkExec at the point the overridden method would normally throw an exception.

  Parameters:

  cmd - the specified system command.

  Throws:

  SecurityException - if the calling thread does not have permission to create a subprocess.

  NullPointerException - if the cmd argument is null.

  See Also:

  Runtime.exec(java.lang.String), Runtime.exec(java.lang.String, java.lang.String[]) , Runtime.exec(java.lang.String[]), Runtime.exec(java.lang.String[], java.lang.String[]) , checkPermission

• checkLink

  public void checkLink(String lib)

  Throws a SecurityException if the calling thread is not allowed to dynamic link the library code specified by the string argument file. The argument is either a simple library name or a complete filename.

  This method is invoked for the current security manager by methods load and loadLibrary of class Runtime.

  This method calls checkPermission with the RuntimePermission("loadLibrary."+lib) permission.

  If you override this method, then you should make a call to super.checkLink at the point the overridden method would normally throw an exception.

  Parameters:

  lib - the name of the library.

  Throws:

  SecurityException - if the calling thread does not have permission to dynamically link the library.

  NullPointerException - if the lib argument is null.

  See Also:

  Runtime.load(java.lang.String), Runtime.loadLibrary(java.lang.String), checkPermission

• checkRead

  public void checkRead(FileDescriptor fd)

  Throws a SecurityException if the calling thread is not allowed to read from the specified file descriptor.

  This method calls checkPermission with the RuntimePermission("readFileDescriptor") permission.

  If you override this method, then you should make a call to super.checkRead at the point the overridden method would normally throw an exception.

  Parameters:

  fd - the system-dependent file descriptor.

  Throws:

  SecurityException - if the calling thread does not have permission to access the specified file descriptor.

  NullPointerException - if the file descriptor argument is null.

  See Also:

  FileDescriptor, checkPermission

• checkRead

  public void checkRead(String file)

  Throws a SecurityException if the calling thread is not allowed to read the file specified by the string argument.

  This method calls checkPermission with the FilePermission(file,"read") permission.

  If you override this method, then you should make a call to super.checkRead at the point the overridden method would normally throw an exception.

  Parameters:

  file - the system-dependent file name.

  Throws:

  SecurityException - if the calling thread does not have permission to access the specified file.

  NullPointerException - if the file argument is null.

  See Also:

  checkPermission

• checkRead

  public void checkRead(String file,
                        Object context)

  Throws a SecurityException if the specified security context is not allowed to read the file specified by the string argument. The context must be a security context returned by a previous call to getSecurityContext.

  If context is an instance of AccessControlContext then the AccessControlContext.checkPermission method will be invoked with the FilePermission(file,"read") permission.

  If context is not an instance of AccessControlContext then a SecurityException is thrown.

  If you override this method, then you should make a call to super.checkRead at the point the overridden method would normally throw an exception.

  Parameters:

  file - the system-dependent filename.

  context - a system-dependent security context.

  Throws:

  SecurityException - if the specified security context is not an instance of AccessControlContext (e.g., is null), or does not have permission to read the specified file.

  NullPointerException - if the file argument is null.

  See Also:

  getSecurityContext(), AccessControlContext.checkPermission(java.security.Permission)

• checkWrite

  public void checkWrite(FileDescriptor fd)

  Throws a SecurityException if the calling thread is not allowed to write to the specified file descriptor.

  This method calls checkPermission with the RuntimePermission("writeFileDescriptor") permission.

  If you override this method, then you should make a call to super.checkWrite at the point the overridden method would normally throw an exception.

  Parameters:

  fd - the system-dependent file descriptor.

  Throws:

  SecurityException - if the calling thread does not have permission to access the specified file descriptor.

  NullPointerException - if the file descriptor argument is null.

  See Also:

  FileDescriptor, checkPermission

• checkWrite

  public void checkWrite(String file)

  Throws a SecurityException if the calling thread is not allowed to write to the file specified by the string argument.

  This method calls checkPermission with the FilePermission(file,"write") permission.

  If you override this method, then you should make a call to super.checkWrite at the point the overridden method would normally throw an exception.

  Parameters:

  file - the system-dependent filename.

  Throws:

  SecurityException - if the calling thread does not have permission to access the specified file.

  NullPointerException - if the file argument is null.

  See Also:

  checkPermission

• checkDelete

  public void checkDelete(String file)

  Throws a SecurityException if the calling thread is not allowed to delete the specified file.

  This method is invoked for the current security manager by the delete method of class File.

  This method calls checkPermission with the FilePermission(file,"delete") permission.

  If you override this method, then you should make a call to super.checkDelete at the point the overridden method would normally throw an exception.

  Parameters:

  file - the system-dependent filename.

  Throws:

  SecurityException - if the calling thread does not have permission to delete the file.

  NullPointerException - if the file argument is null.

  See Also:

  File.delete(), checkPermission

• checkConnect

  public void checkConnect(String host,
                           int port)

  Throws a SecurityException if the calling thread is not allowed to open a socket connection to the specified host and port number.

  A port number of -1 indicates that the calling method is attempting to determine the IP address of the specified host name.

  This method calls checkPermission with the SocketPermission(host+":"+port,"connect") permission if the port is not equal to -1. If the port is equal to -1, then it calls checkPermission with the SocketPermission(host,"resolve") permission.

  If you override this method, then you should make a call to super.checkConnect at the point the overridden method would normally throw an exception.

  Parameters:

  host - the host name port to connect to.

  port - the protocol port to connect to.

  Throws:

  SecurityException - if the calling thread does not have permission to open a socket connection to the specified host and port.

  NullPointerException - if the host argument is null.

  See Also:

  checkPermission

• checkConnect

  public void checkConnect(String host,
                           int port,
                           Object context)

  Throws a SecurityException if the specified security context is not allowed to open a socket connection to the specified host and port number.

  A port number of -1 indicates that the calling method is attempting to determine the IP address of the specified host name.

  If context is not an instance of AccessControlContext then a SecurityException is thrown.

  Otherwise, the port number is checked. If it is not equal to -1, the context's checkPermission method is called with a SocketPermission(host+":"+port,"connect") permission. If the port is equal to -1, then the context's checkPermission method is called with a SocketPermission(host,"resolve") permission.

  If you override this method, then you should make a call to super.checkConnect at the point the overridden method would normally throw an exception.

  Parameters:

  host - the host name port to connect to.

  port - the protocol port to connect to.

  context - a system-dependent security context.

  Throws:

  SecurityException - if the specified security context is not an instance of AccessControlContext (e.g., is null), or does not have permission to open a socket connection to the specified host and port.

  NullPointerException - if the host argument is null.

  See Also:

  getSecurityContext(), AccessControlContext.checkPermission(java.security.Permission)

• checkListen

  public void checkListen(int port)

  Throws a SecurityException if the calling thread is not allowed to wait for a connection request on the specified local port number.

  If port is not 0, this method calls checkPermission with the SocketPermission("localhost:"+port,"listen"). If port is zero, this method calls checkPermission with SocketPermission("localhost:1024-","listen").

  If you override this method, then you should make a call to super.checkListen at the point the overridden method would normally throw an exception.

  Parameters:

  port - the local port.

  Throws:

  SecurityException - if the calling thread does not have permission to listen on the specified port.

  See Also:

  checkPermission

• checkAccept

  public void checkAccept(String host,
                          int port)

  Throws a SecurityException if the calling thread is not permitted to accept a socket connection from the specified host and port number.

  This method is invoked for the current security manager by the accept method of class ServerSocket.

  This method calls checkPermission with the SocketPermission(host+":"+port,"accept") permission.

  If you override this method, then you should make a call to super.checkAccept at the point the overridden method would normally throw an exception.

  Parameters:

  host - the host name of the socket connection.

  port - the port number of the socket connection.

  Throws:

  SecurityException - if the calling thread does not have permission to accept the connection.

  NullPointerException - if the host argument is null.

  See Also:

  ServerSocket.accept(), checkPermission

• checkMulticast

  public void checkMulticast(InetAddress maddr)

  Throws a SecurityException if the calling thread is not allowed to use (join/leave/send/receive) IP multicast.

  This method calls checkPermission with the java.net.SocketPermission(maddr.getHostAddress(), "accept,connect") permission.

  If you override this method, then you should make a call to super.checkMulticast at the point the overridden method would normally throw an exception.

  Parameters:

  maddr - Internet group address to be used.

  Throws:

  SecurityException - if the calling thread is not allowed to use (join/leave/send/receive) IP multicast.

  NullPointerException - if the address argument is null.

  Since:

  JDK1.1

  See Also:

  checkPermission

• checkMulticast

  @Deprecated
  public void checkMulticast(InetAddress maddr,
                                         byte ttl)

  Deprecated. Use #checkPermission(java.security.Permission) instead
  Throws a SecurityException if the calling thread is not allowed to use (join/leave/send/receive) IP multicast.

  This method calls checkPermission with the java.net.SocketPermission(maddr.getHostAddress(), "accept,connect") permission.

  If you override this method, then you should make a call to super.checkMulticast at the point the overridden method would normally throw an exception.

  Parameters:

  maddr - Internet group address to be used.

  ttl - value in use, if it is multicast send. Note: this particular implementation does not use the ttl parameter.

  Throws:

  SecurityException - if the calling thread is not allowed to use (join/leave/send/receive) IP multicast.

  NullPointerException - if the address argument is null.

  Since:

  JDK1.1

  See Also:

  checkPermission

• checkPropertiesAccess

  public void checkPropertiesAccess()

  Throws a SecurityException if the calling thread is not allowed to access or modify the system properties.

  This method is used by the getProperties and setProperties methods of class System.

  This method calls checkPermission with the PropertyPermission("*", "read,write") permission.

  If you override this method, then you should make a call to super.checkPropertiesAccess at the point the overridden method would normally throw an exception.

  Throws:

  SecurityException - if the calling thread does not have permission to access or modify the system properties.

  See Also:

  System.getProperties(), System.setProperties(java.util.Properties), checkPermission

• checkPropertyAccess

  public void checkPropertyAccess(String key)

  Throws a SecurityException if the calling thread is not allowed to access the system property with the specified key name.

  This method is used by the getProperty method of class System.

  This method calls checkPermission with the PropertyPermission(key, "read") permission.

  If you override this method, then you should make a call to super.checkPropertyAccess at the point the overridden method would normally throw an exception.

  Parameters:

  key - a system property key.

  Throws:

  SecurityException - if the calling thread does not have permission to access the specified system property.

  NullPointerException - if the key argument is null.

  IllegalArgumentException - if key is empty.

  See Also:

  System.getProperty(java.lang.String), checkPermission

• checkTopLevelWindow

  @Deprecated
  public boolean checkTopLevelWindow(Object window)

  Deprecated. The dependency on AWTPermission creates an impediment to future modularization of the Java platform. Users of this method should instead invoke checkPermission(java.security.Permission) directly.This method will be changed in a future releasewas originally used to check the permission java.security.AllPermission.Returns falseif the calling thread is notwas trusted to bring up thea top-level window indicated by the window argument. In this case, the caller can still decide to show the window, but the window should include some sort of visual warning. If the. The method returns true, then the window can be shown without any special restrictions. See class Window for more information on trustedhas been obsoleted and untrusted windows. This method callscode should instead use checkPermission with the(java.security.Permission) to check AWTPermission("showWindowWithoutWarningBanner").
  permission, and returnsReturns true if a SecurityException is not thrown, otherwise it returns false. Inthe case of subset Profiles of Java SE that do not include the java.awt package, checkPermission is instead called to check the permissionjava.security.calling thread has AllPermission. If you override this method, then you should make a call to super.checkTopLevelWindow at the point the overridden method would normally return false, and the value of super.checkTopLevelWindow should be returned.

  Parameters:

  window - the new window thatnot used except to check if it is being creatednull .

  Returns:

  true if the calling thread is trusted to put up top-level windows; false otherwisehas AllPermission.

  Throws:

  NullPointerException - if the window argument is null.

  See Also:

  Window,checkPermission

• checkPrintJobAccess

  public void checkPrintJobAccess()

  Throws a SecurityException if the calling thread is not allowed to initiate a print job request.

  This method calls checkPermission with the RuntimePermission("queuePrintJob") permission.

  If you override this method, then you should make a call to super.checkPrintJobAccess at the point the overridden method would normally throw an exception.

  Throws:

  SecurityException - if the calling thread does not have permission to initiate a print job request.

  Since:

  JDK1.1

  See Also:

  checkPermission

• checkSystemClipboardAccess

  @Deprecated
  public void checkSystemClipboardAccess()

  Deprecated. The dependency on AWTPermission creates an impedimentThis method was originally used to future modularization ofcheck if the calling thread could access the Java platform. Users of thissystem clipboard. The method has been obsoleted and code should instead invokeuse checkPermission(java.security.Permission) directly. This method will be changed in a future releaseto check the permission java.security.AllPermissionAWTPermission("accessClipboard") .
  Throws aSecurityException if the calling thread isdoes not allowed to access the system clipboard. This method calls checkPermission with the AWTPermission("accessClipboard") permission. In the case of subset Profiles of Java SE that do not include the java.awt package, checkPermission is instead called to check the permissionjava.security.have AllPermission. If you override this method, then you should make a call to super.checkSystemClipboardAccess at the point the overridden method would normally throw an exception.

  Throws:

  SecurityException - if the calling thread does not have permission to access the system clipboard.AllPermission

  Since:

  JDK1.1

  See Also:

  checkPermission

• checkAwtEventQueueAccess

  @Deprecated
  public void checkAwtEventQueueAccess()

  Deprecated. The dependency on AWTPermission creates an impedimentThis method was originally used to future modularization ofcheck if the calling thread could access the Java platform. Users of thisAWT event queue. The method has been obsoleted and code should instead invokeuse checkPermission(java.security.Permission) directly. This method will be changed in a future releaseto check the permission java.security.AllPermissionAWTPermission("accessEventQueue") .
  Throws aSecurityException if the calling thread isdoes not allowed to access the AWT event queue. This method calls checkPermission with the AWTPermission("accessEventQueue") permission. In the case of subset Profiles of Java SE that do not include the java.awt package, checkPermission is instead called to check the permissionjava.security.have AllPermission.

  If you override this method, then you should make a call to super.checkAwtEventQueueAccess at the point the overridden method would normally throw an exception.

  Throws:

  SecurityException - if the calling thread does not have permission to access the AWT event queue.AllPermission

  Since:

  JDK1.1

  See Also:

  checkPermission

• checkPackageAccess

  public void checkPackageAccess(String pkg)

  Throws a SecurityException if the calling thread is not allowed to access the package specified by the argument.

  This method is used by the loadClass method of class loaders.

  This method first gets a list of restricted packages by obtaining a comma-separated list from a call to java.security.Security.getProperty("package.access"), and checks to see if pkg starts with or equals any of the restricted packages. If it does, then checkPermission gets called with the RuntimePermission("accessClassInPackage."+pkg) permission.

  If this method is overridden, then super.checkPackageAccess should be called as the first line in the overridden method.

  Parameters:

  pkg - the package name.

  Throws:

  SecurityException - if the calling thread does not have permission to access the specified package.

  NullPointerException - if the package name argument is null.

  See Also:

  loadClass, getProperty, checkPermission

• checkPackageDefinition

  public void checkPackageDefinition(String pkg)

  Throws a SecurityException if the calling thread is not allowed to define classes in the package specified by the argument.

  This method is used by the loadClass method of some class loaders.

  This method first gets a list of restricted packages by obtaining a comma-separated list from a call to java.security.Security.getProperty("package.definition"), and checks to see if pkg starts with or equals any of the restricted packages. If it does, then checkPermission gets called with the RuntimePermission("defineClassInPackage."+pkg) permission.

  If this method is overridden, then super.checkPackageDefinition should be called as the first line in the overridden method.

  Parameters:

  pkg - the package name.

  Throws:

  SecurityException - if the calling thread does not have permission to define classes in the specified package.

  See Also:

  ClassLoader.loadClass(java.lang.String, boolean) , getProperty, checkPermission

• checkSetFactory

  public void checkSetFactory()

  Throws a SecurityException if the calling thread is not allowed to set the socket factory used by ServerSocket or Socket, or the stream handler factory used by URL.

  This method calls checkPermission with the RuntimePermission("setFactory") permission.

  If you override this method, then you should make a call to super.checkSetFactory at the point the overridden method would normally throw an exception.

  Throws:

  SecurityException - if the calling thread does not have permission to specify a socket factory or a stream handler factory.

  See Also:

  setSocketFactory, setSocketImplFactory, setURLStreamHandlerFactory, checkPermission

• checkMemberAccess

  @Deprecated
  public void checkMemberAccess(Class<?> clazz,
                                            int which)

  Deprecated. This method relies on the caller being at a stack depth of 4 which is error-prone and cannot be enforced by the runtime. Users of this method should instead invoke checkPermission(java.security.Permission) directly. This method will be changed in a future release to check the permission java.security.AllPermission.
  Throws a SecurityException if the calling thread is not allowed to access members.

  The default policy is to allow access to PUBLIC members, as well as access to classes that have the same class loader as the caller. In all other cases, this method calls checkPermission with the RuntimePermission("accessDeclaredMembers") permission.

  If this method is overridden, then a call to super.checkMemberAccess cannot be made, as the default implementation of checkMemberAccess relies on the code being checked being at a stack depth of 4.

  Parameters:

  clazz - the class that reflection is to be performed on.

  which - type of access, PUBLIC or DECLARED.

  Throws:

  SecurityException - if the caller does not have permission to access members.

  NullPointerException - if the clazz argument is null.

  Since:

  JDK1.1

  See Also:

  Member, checkPermission

• checkSecurityAccess

  public void checkSecurityAccess(String target)

  Determines whether the permission with the specified permission target name should be granted or denied.

  If the requested permission is allowed, this method returns quietly. If denied, a SecurityException is raised.

  This method creates a SecurityPermission object for the given permission target name and calls checkPermission with it.

  See the documentation for SecurityPermission for a list of possible permission target names.

  If you override this method, then you should make a call to super.checkSecurityAccess at the point the overridden method would normally throw an exception.

  Parameters:

  target - the target name of the SecurityPermission.

  Throws:

  SecurityException - if the calling thread does not have permission for the requested access.

  NullPointerException - if target is null.

  IllegalArgumentException - if target is empty.

  Since:

  JDK1.1

  See Also:

  checkPermission

• getThreadGroup

  public ThreadGroup getThreadGroup()

  Returns the thread group into which to instantiate any new thread being created at the time this is being called. By default, it returns the thread group of the current thread. This should be overridden by a specific security manager to return the appropriate thread group.

  Returns:

  ThreadGroup that new threads are instantiated into

  Since:

  JDK1.1

  See Also:

  ThreadGroup