THE PACKAGE JAVA.LANG

java.lang.SecurityManager

20.17

20.17.2

protected SecurityManager()

throws SecurityException

This constructor checks to see whether a security manager has already been

installed ( 20.18.5); if so, creation of another security manager is not permitted,

and so a

SecurityException

 is thrown.

20.17.3

protected Class[] getClassContext()

This utility method for security managers scans the execution stack for the current

thread and returns an array with one component for each stack frame. The compo 

nent at position

0

 corresponds to the top of the stack. If a component is a

Class

object, then the corresponding stack frame is for an invocation of a method of the

class represented by that

Class

 object.

20.17.4

protected int classDepth(String name)

This utility method for security managers searches the execution stack for the cur 

rent thread to find the most recently invoked method whose execution has not yet

completed and whose class has

name

 as its fully qualified name. If such a method

is found, its distance from the top of the stack is returned as a nonnegative integer;

otherwise,

 1

 is returned.

20.17.5

protected boolean inClass(String name)

This utility method for security managers searches the execution stack for the cur 

rent thread to find the most recently invoked method whose execution has not yet

completed and whose class has

name

 as its fully qualified name. If such a method

is found,

true

 is returned; otherwise,

false

 is returned.

20.17.6

protected ClassLoader currentClassLoader()

This utility method for security managers searches the execution stack for the cur 

rent thread to find the most recently invoked method whose execution has not yet

completed and whose class was created by a class loader ( 20.14). If such a

method is found, a reference to the

ClassLoader

 object for its class is returned;

otherwise,

null

 is returned.

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