PolicySpi

public abstract class PolicySpi
extends Object

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.

Summary

Public constructors
`PolicySpi()`

Protected methods
`PermissionCollection`	`engineGetPermissions(ProtectionDomain domain)` Return a PermissionCollection object containing the set of permissions granted to the specified ProtectionDomain.
`PermissionCollection`	`engineGetPermissions(CodeSource codesource)` Return a PermissionCollection object containing the set of permissions granted to the specified CodeSource.
`abstract boolean`	`engineImplies(ProtectionDomain domain, Permission permission)` Check whether the policy has granted a Permission to a ProtectionDomain.
`void`	`engineRefresh()` Refreshes/reloads the policy configuration.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public constructors

PolicySpi

Added in API level 9

public PolicySpi ()

Protected methods

engineGetPermissions

Added in API level 9

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`	`ProtectionDomain`: the ProtectionDomain to which the returned PermissionCollection has been granted.

Returns
`PermissionCollection`	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.

engineGetPermissions

Added in API level 9

protected PermissionCollection engineGetPermissions (CodeSource codesource)

Return a PermissionCollection object containing the set of permissions granted to the specified CodeSource.

Parameters
`codesource`	`CodeSource`: the CodeSource to which the returned PermissionCollection has been granted.

Returns
`PermissionCollection`	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.

engineImplies

Added in API level 9

protected abstract boolean engineImplies (ProtectionDomain domain, 
                Permission permission)

Check whether the policy has granted a Permission to a ProtectionDomain.

Parameters
`domain`	`ProtectionDomain`: the ProtectionDomain to check.
`permission`	`Permission`: check whether this permission is granted to the specified domain.

Returns
`boolean`	boolean true if the permission is granted to the domain.

engineRefresh

Added in API level 9

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.