IT. Expert System.

public abstract class PolicySpi
extends Object

• Constructor Summary

  Constructors

  Constructor and Description
  PolicySpi()

• Method Summary

  Methods

  Modifier and Type	Method and Description
  protected PermissionCollection	engineGetPermissions(CodeSource codesource) Answers a PermissionCollection object containing the set of permissions granted to the specified CodeSource.
  protected PermissionCollection	engineGetPermissions(ProtectionDomain domain) Answers a PermissionCollection object containing the set of permissions granted to the specified ProtectionDomain.
  protected abstract boolean	engineImplies(ProtectionDomain domain, Permission permission) Answers if the policy has granted a Permission to a ProtectionDomain.
  protected void	engineRefresh() Refreshes/reloads the policy configuration.

  • Methods inherited from class java.lang.Object

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

• Constructor Detail

  • PolicySpi

    public PolicySpi()

• Method Detail

  • engineImplies

    protected abstract boolean engineImplies(ProtectionDomain domain,
                        Permission permission)

    Answers if the policy has granted a Permission to a ProtectionDomain.

    Parameters:

    domain - - the domain to check.

    permission - - check whether this permission is granted to the specified domain.

    Returns:

    - true if the permission is granted to the domain.

  • engineRefresh

    protected void engineRefresh()

    Refreshes/reloads the policy configuration. The behavior of this method depends on the implementation. For example, calling refresh on a file-based policy will cause the file to be re-read. The default implementation of this method does nothing. This method should be overridden if a refresh operation is supported by the policy implementation.

  • engineGetPermissions

    protected PermissionCollection engineGetPermissions(CodeSource codesource)

    Answers a PermissionCollection object containing the set of permissions granted to the specified CodeSource. The default implementation of this method returns Policy.UNSUPPORTED_EMPTY_COLLECTION object. This method can be overridden if the policy implementation can return a set of permissions granted to a CodeSource.

    Parameters:

    codesource - - the CodeSource to which the returned PermissionCollection has been granted.

    Returns:

    a set of permissions granted to the specified CodeSource. If this operation is supported, the returned set of permissions must be a new mutable instance and it must support heterogeneous Permission types. If this operation is not supported, Policy.UNSUPPORTED_EMPTY_COLLECTION is returned.

  • engineGetPermissions

    protected PermissionCollection engineGetPermissions(ProtectionDomain domain)

    Answers a PermissionCollection object containing the set of permissions granted to the specified ProtectionDomain. The default implementation of this method returns Policy.UNSUPPORTED_EMPTY_COLLECTION object. This method can be overridden if the policy implementation can return a set of permissions granted to a ProtectionDomain.

    Parameters:

    domain - - the ProtectionDomain to which the returned PermissionCollection has been granted.

    Returns:

    a set of permissions granted to the specified ProtectionDomain. If this operation is supported, the returned set of permissions must be a new mutable instance and it must support heterogeneous Permission types. If this operation is not supported, Policy.UNSUPPORTED_EMPTY_COLLECTION is returned.