java.security

Class PolicySpi

java.lang.Object

java.security.PolicySpi

public abstract class PolicySpi
extends Object

Represents the Service Provider Interface (SPI) for java.security.Policy class.

If there is any class that wants to provide a Policy implementation, all abstract methods in this SPI should be implemented.

The detailed implementations should offer a public constructor, in which a Policy.Paramters implementation acts as an input parameter.If the Policy.Paramters input cannot by understood by the constructor, an IllegalArgumentException will be thrown.

Constructor Summary

Constructors

Constructor and Description
PolicySpi()

Method Summary

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.