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java.security
abstract public class: PolicySpi [javadoc | source]
java.lang.Object
   java.security.PolicySpi
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.

Method from java.security.PolicySpi Summary:
engineGetPermissions,   engineGetPermissions,   engineImplies,   engineRefresh
Methods from java.lang.Object:
clone,   equals,   finalize,   getClass,   hashCode,   notify,   notifyAll,   toString,   wait,   wait,   wait
Method from java.security.PolicySpi Detail:
 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.

 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.

 abstract protected boolean engineImplies(ProtectionDomain domain,
    Permission permission)
    Check whether the policy has granted a Permission to a ProtectionDomain.
 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.