org.apache.avalon.framework.service

Class WrapperServiceSelector

public class WrapperServiceSelector extends Object implements ServiceSelector

This is a ServiceSelector implementation that can wrap around a legacy ComponentSelector object effectively adapting a ComponentSelector interface to a ServiceSelector interface.

This class implements the Component interface because it is used in environments which expect all components to implement Component.

Version: CVS $Revision: 1.7 $ $Date: 2003/02/10 07:19:18 $

Author: Avalon Development Team

Constructor Summary
WrapperServiceSelector(String key, ComponentSelector selector)
This constructor is a constructor for a ComponentServiceManager
Method Summary
booleanisSelectable(Object policy)
Check to see if a Object exists relative to the supplied policy.
voidrelease(Object object)
Return the Object when you are finished with it.
Objectselect(Object policy)
Select a service based on a policy.

Constructor Detail

WrapperServiceSelector

public WrapperServiceSelector(String key, ComponentSelector selector)
This constructor is a constructor for a ComponentServiceManager

Parameters: key the key used to aquire this selector selector the selector to wrap

Method Detail

isSelectable

public boolean isSelectable(Object policy)
Check to see if a Object exists relative to the supplied policy.

Parameters: policy a Object containing the selection criteria

Returns: True if the component is available, False if it not.

release

public void release(Object object)
Return the Object when you are finished with it. This allows the ServiceSelector to handle the End-Of-Life Lifecycle events associated with the Object. Please note, that no Exception should be thrown at this point. This is to allow easy use of the ServiceSelector system without having to trap Exceptions on a release.

Parameters: object The Object we are releasing.

select

public Object select(Object policy)
Select a service based on a policy.

Parameters: policy the policy

Returns: the service

Throws: ServiceException if unable to select service