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Class java.lang.SecurityManager

java.lang.Object
|
   +----java.lang.SecurityManager

public class SecurityManager

extends Object

inCheck

SecurityManager()

Constructs a new SecurityManager.

checkAccept(String, int)

Checks to see if a socket connection to the specified port on the specified host has been accepted.

checkAccess(Thread)

Checks to see if the specified Thread is allowed to modify the Thread group.

checkAccess(ThreadGroup)

Checks to see if the specified Thread group is allowed to modify this group.

checkConnect(String, int)

Checks to see if a socket has connected to the specified port on the the specified host.

checkConnect(String, int, Object)

Checks to see if the current execution context and the indicated execution context are both allowed to connect to the indicated host and port.

checkCreateClassLoader()

Checks to see if the ClassLoader has been created.

checkDelete(String)

Checks to see if a file with the specified system dependent file name can be deleted.

checkExec(String)

Checks to see if the system command is executed by trusted code.

checkExit(int)

Checks to see if the system has exited the virtual machine with an exit code.

checkLink(String)

Checks to see if the specified linked library exists.

checkListen(int)

Checks to see if a server socket is listening to the specified local port that it is bounded to.

checkPackageAccess(String)

Checks to see if an applet can access a package.

checkPackageDefinition(String)

Checks to see if an applet can define classes in a package.

checkPropertiesAccess()

Checks to see who has access to the System properties.

checkPropertyAccess(String)

Checks to see who has access to the System property named by key.

checkPropertyAccess(String, String)

Checks to see who has access to the System property named by key and def.

checkRead(FileDescriptor)

Checks to see if an input file with the specified file descriptor object gets created.

checkRead(String)

Checks to see if an input file with the specified system dependent file name gets created.

checkRead(String, Object)

Checks to see if the current context or the indicated context are both allowed to read the given file name.

checkSetFactory()

Checks to see if an applet can set a networking-related object factory.

checkTopLevelWindow(Object)

Checks to see if top-level windows can be created by the caller.

checkWrite(FileDescriptor)

Checks to see if an output file with the specified file descriptor object gets created.

checkWrite(String)

Checks to see if an output file with the specified system dependent file name gets created.

classDepth(String)

Return the position of the stack frame containing the first occurrence of the named class.

classLoaderDepth()

currentClassLoader()

The current ClassLoader on the execution stack.

getClassContext()

Gets the context of this Class.

getInCheck()

Returns whether there is a security check in progress.

getSecurityContext()

Returns an implementation-dependent Object which encapsulates enough information about the current execution environment to perform some of the security checks later.

inClass(String)

Returns true if the specified String is in this Class.

inClassLoader()

Returns a boolean indicating whether or not the current ClassLoader is equal to null.

protected boolean inCheck

protected SecurityManager()

Constructs a new SecurityManager.

Throws: SecurityException

If the security manager cannot be created.

public boolean getInCheck()

Returns whether there is a security check in progress.

protected Class[] getClassContext()

Gets the context of this Class.

protected ClassLoader currentClassLoader()

The current ClassLoader on the execution stack.

protected int classDepth(String name)

Return the position of the stack frame containing the first occurrence of the named class.

Parameters:

name - classname of the class to search for

protected int classLoaderDepth()

protected boolean inClass(String name)

Returns true if the specified String is in this Class.

Parameters:

name - the name of the class

protected boolean inClassLoader()

Returns a boolean indicating whether or not the current ClassLoader is equal to null.

public Object getSecurityContext()

Returns an implementation-dependent Object which encapsulates enough information about the current execution environment to perform some of the security checks later.

public void checkCreateClassLoader()

Checks to see if the ClassLoader has been created.

Throws: SecurityException

If a security error has occurred.

public void checkAccess(Thread g)

Checks to see if the specified Thread is allowed to modify the Thread group.

Parameters:

g - the Thread to be checked

Throws: SecurityException

If the current Thread is not allowed to access this Thread group.

public void checkAccess(ThreadGroup g)

Checks to see if the specified Thread group is allowed to modify this group.

Parameters:

g - the Thread group to be checked

Throws: SecurityException

If the current Thread group is not allowed to access this Thread group.

public void checkExit(int status)

Checks to see if the system has exited the virtual machine with an exit code.

Parameters:

status - exit status, 0 if successful, other values indicate various error types.

Throws: SecurityException

If a security error has occurred.

public void checkExec(String cmd)

Checks to see if the system command is executed by trusted code.

Parameters:

cmd - the specified system command

Throws: SecurityException

If a security error has occurred.

public void checkLink(String lib)

Checks to see if the specified linked library exists.

Parameters:

lib - the name of the library

Throws: SecurityException

If the library does not exist.

public void checkRead(FileDescriptor fd)

Checks to see if an input file with the specified file descriptor object gets created.

Parameters:

fd - the system dependent file descriptor

Throws: SecurityException

If a security error has occurred.

public void checkRead(String file)

Checks to see if an input file with the specified system dependent file name gets created.

Parameters:

file - the system dependent file name

Throws: SecurityException

If the file is not found.

public void checkRead(String file,
Object context)

Checks to see if the current context or the indicated context are both allowed to read the given file name.

Parameters:

file - the system dependent file name

context - the alternate execution context which must also be checked

Throws: SecurityException

If the file is not found.

public void checkWrite(FileDescriptor fd)

Checks to see if an output file with the specified file descriptor object gets created.

Parameters:

fd - the system dependent file descriptor

Throws: SecurityException

If a security error has occurred.

public void checkWrite(String file)

Checks to see if an output file with the specified system dependent file name gets created.

Parameters:

file - the system dependent file name

Throws: SecurityException

If the file is not found.

public void checkDelete(String file)

Checks to see if a file with the specified system dependent file name can be deleted.

Parameters:

file - the system dependent file name

Throws: SecurityException

If the file is not found.

public void checkConnect(String host,
                           int port)

Checks to see if a socket has connected to the specified port on the the specified host.

Parameters:

host - the host name port to connect to

port - the protocol port to connect to

Throws: SecurityException

If a security error has occurred.

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

Checks to see if the current execution context and the indicated execution context are both allowed to connect to the indicated host and port.

public void checkListen(int port)

Checks to see if a server socket is listening to the specified local port that it is bounded to.

Parameters:

port - the protocol port to connect to

Throws: SecurityException

If a security error has occurred.

public void checkAccept(String host,
                          int port)

Checks to see if a socket connection to the specified port on the specified host has been accepted.

Parameters:

host - the host name to connect to

port - the protocol port to connect to

Throws: SecurityException

If a security error has occurred.

public void checkPropertiesAccess()

Checks to see who has access to the System properties.

Throws: SecurityException

If a security error has occurred.

public void checkPropertyAccess(String key)

Checks to see who has access to the System property named by key.

Parameters:

key - the System property that the caller wants to examine

Throws: SecurityException

If a security error has occurred.

public void checkPropertyAccess(String key,
String def)

Checks to see who has access to the System property named by key and def.

Parameters:

key - the System property that the caller wants to examine

def - default value to return if this property is not defined

Throws: SecurityException

If a security error has occurred.

public boolean checkTopLevelWindow(Object window)

Checks to see if top-level windows can be created by the caller. A return of false means that the window creation is allowed but the window should indicate some sort of visual warning. Returning true means the creation is allowed with no special restrictions. To disallow the creation entirely, this method should throw a SecurityException.

Parameters:

window - the new window that's being created.

public void checkPackageAccess(String pkg)

Checks to see if an applet can access a package.

public void checkPackageDefinition(String pkg)

Checks to see if an applet can define classes in a package.

public void checkSetFactory()

Checks to see if an applet can set a networking-related object factory.

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