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## java.security
Class AccessController

    java.lang.Object
      java.security.AccessController

    @TransactionType(value=NOT_SUPPORTED)
    public final class AccessController

extends Object

The AccessController class is used for access control operations and decisions.

More specifically, the AccessController class is used to decide whether an access to a critical system resource is to be allowed or denied, based on the security policy currently in effect.

The `checkPermission` method determines whether the access request indicated by a specified permission should be granted or denied. A sample call appears below. In this example, `checkPermission` will determine whether or not to grant "read" access to the file named "testFile" in the "/temp" directory.

     ConnectorPermission perm = new ConnectorPermission("file:///temp/testFile", "read");
     AccessController.checkPermission(perm);

If a requested access is allowed, `checkPermission` returns quietly. If denied, an AccessControlException is thrown. AccessControlException can also be thrown if the requested permission is of an incorrect type or contains an invalid value. Such information is given whenever possible.

This Java Card class is a subset of the CDC 1.1 AccessController class. Some interfaces, methods and/or variables have been pruned, and/or other methods simplified, in an effort to reduce the size of this class and/or eliminate dependencies on unsupported features.

Since:
  CDC 1.0, Java Card 3.0

Method Summary
`static void` | `checkPermission(Permission perm)` Determines whether the access request indicated by the specified permission should be allowed or denied, based on the security policy currently in effect.

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Method Detail

### checkPermission

    public static void checkPermission(Permission perm)
                                throws AccessControlException

  Determines whether the access request indicated by the specified permission should be allowed or denied, based on the security policy currently in effect. This method quietly returns if the access request is permitted, or throws a suitable AccessControlException otherwise.

  Parameters:
    `perm` - the requested permission.
  Throws:
    `AccessControlException` - if the specified permission is not permitted, based on the current security policy.
    `NullPointerException` - if the specified permission is `null` and is checked based on the security policy currently in effect.

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Copyright (c) 2009 Sun Microsystems, Inc. All rights reserved.