| java.lang.Object | |
| ↳ | java.security.PolicySpi |
 Known Direct Subclasses
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Class Overview
This class defines the Service Provider Interface (SPI)
for the Policy class.
All the abstract methods in this class must be implemented by each
service provider who wishes to supply a Policy implementation.
Subclass implementations of this abstract class must provide
a public constructor that takes a Policy.Parameters
object as an input parameter. This constructor also must throw
an IllegalArgumentException if it does not understand the
Policy.Parameters input.
Summary
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| Protected Methods | |||||||||||
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Return a PermissionCollection object containing the set of
permissions granted to the specified CodeSource.
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Return a PermissionCollection object containing the set of
permissions granted to the specified ProtectionDomain.
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Check whether the policy has granted a Permission to a ProtectionDomain.
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Refreshes/reloads the policy configuration.
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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Public Constructors
public PolicySpi ()
Protected Methods
protected PermissionCollection engineGetPermissions (CodeSource codesource)
Return 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.
protected PermissionCollection engineGetPermissions (ProtectionDomain domain)
Return 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.
protected abstract boolean engineImplies (ProtectionDomain domain, Permission permission)
Check whether the policy has granted a Permission to a ProtectionDomain.
Parameters
| domain | the ProtectionDomain to check. |
|---|---|
| permission | check whether this permission is granted to the specified domain. |
Returns
- boolean true if the permission is granted to the domain.
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.