jdk.security.AccessControlContext — clojure-interop/java.security 1.0.5

An AccessControlContext is used to make system resource access decisions based on the context it encapsulates.

More specifically, it encapsulates a context and has a single method, checkPermission, that is equivalent to the checkPermission method in the AccessController class, with one difference: The AccessControlContext checkPermission method makes access decisions based on the context it encapsulates, rather than that of the current execution thread.

Thus, the purpose of AccessControlContext is for those situations where a security check that should be made within a given context actually needs to be done from within a different context (for example, from within a worker thread).

An AccessControlContext is created by calling the AccessController.getContext method. The getContext method takes a "snapshot" of the current calling context, and places it in an AccessControlContext object, which it returns. A sample call is the following:

AccessControlContext acc = AccessController.getContext()

Code within a different context can subsequently call the checkPermission method on the previously-saved AccessControlContext object. A sample call is the following:

acc.checkPermission(permission)

->access-control-context clj

(->access-control-context context)

(->access-control-context acc combiner)

Constructor.

Create a new AccessControlContext with the given AccessControlContext and DomainCombiner. This constructor associates the provided DomainCombiner with the provided AccessControlContext.

acc - the AccessControlContext associated with the provided DomainCombiner. - java.security.AccessControlContext combiner - the DomainCombiner to be associated with the provided AccessControlContext. - java.security.DomainCombiner

throws: java.lang.NullPointerException - if the provided context is null.

check-permission clj

(check-permission this perm)

Determines whether the access request indicated by the specified permission should be allowed or denied, based on the security policy currently in effect, and the context in this object. The request is allowed only if every ProtectionDomain in the context implies the permission. Otherwise the request is denied.

This method quietly returns if the access request is permitted, or throws a suitable AccessControlException otherwise.

perm - the requested permission. - java.security.Permission

throws: java.security.AccessControlException - if the specified permission is not permitted, based on the current security policy and the context encapsulated by this object.

equals clj

(equals this obj)

Checks two AccessControlContext objects for equality. Checks that obj is an AccessControlContext and has the same set of ProtectionDomains as this context.

obj - the object we are testing for equality with this object. - java.lang.Object

returns: true if obj is an AccessControlContext, and has the same set of ProtectionDomains as this context, false otherwise. - boolean

get-domain-combiner clj

(get-domain-combiner this)

Get the DomainCombiner associated with this AccessControlContext.

returns: the DomainCombiner associated with this AccessControlContext, or null if there is none. - java.security.DomainCombiner

throws: java.lang.SecurityException - if a security manager is installed and the caller does not have the "getDomainCombiner" SecurityPermission

hash-code clj

(hash-code this)

Returns the hash code value for this context. The hash code is computed by exclusive or-ing the hash code of all the protection domains in the context together.

returns: a hash code value for this context. - int