java.security

Class AccessControlContext

java.lang.Object

java.security.AccessControlContext

public final class AccessControlContext
extends Object

AccessControlContext makes system resource access decsion based on permission rights. It is used for a specific context and has only one method checkPermission. It is similar to AccessController except that it makes decsions based on the current context instead of the the current thread. It is created by call AccessController.getContext method.

Since:

1.2

Constructor Summary

Constructors

Constructor and Description
AccessControlContext(AccessControlContext acc, DomainCombiner combiner) Construct a new AccessControlContext with the specified ProtectionDomains and DomainCombiner.
AccessControlContext(ProtectionDomain[] context) Construct a new AccessControlContext with the specified ProtectionDomains.

Method Summary

Methods

Modifier and Type	Method and Description
void	checkPermission(Permission perm) Determines whether or not the specific permission is granted depending on the context it is within.
boolean	equals(Object obj) Checks if two AccessControlContexts are equal.
DomainCombiner	getDomainCombiner() Returns the Domain Combiner associated with the AccessControlContext
int	hashCode() Computes a hash code of this class

Methods inherited from class java.lang.Object

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

Constructor Detail

AccessControlContext

public AccessControlContext(ProtectionDomain[] context)

Construct a new AccessControlContext with the specified ProtectionDomains. context must not be null and duplicates will be removed.

Parameters:

context - The ProtectionDomains to use

AccessControlContext

public AccessControlContext(AccessControlContext acc,
                    DomainCombiner combiner)

Construct a new AccessControlContext with the specified ProtectionDomains and DomainCombiner.

Code calling this constructor must have a SecurityPermission of createAccessControlContext.

Throws:

SecurityException - If the caller does not have permission to create an access control context.

Since:

1.3

Method Detail

getDomainCombiner

public DomainCombiner getDomainCombiner()

Returns the Domain Combiner associated with the AccessControlContext

Returns:

the DomainCombiner

checkPermission

public void checkPermission(Permission perm)
                     throws AccessControlException

Determines whether or not the specific permission is granted depending on the context it is within.

Parameters:

perm - a permission to check

Throws:

AccessControlException - if the permssion is not permitted

equals

public boolean equals(Object obj)

Checks if two AccessControlContexts are equal. It first checks if obj is an AccessControlContext class, and then checks if each ProtectionDomain matches.

Overrides:

equals in class Object

Parameters:

obj - The object to compare this class to

Returns:

true if equal, false otherwise

See Also:

Object.hashCode()

hashCode

public int hashCode()

Computes a hash code of this class

Overrides:

hashCode in class Object

Returns:

a hash code representing this class

See Also:

Object.equals(Object), System.identityHashCode(Object)