- All Known Implementing Classes:
BeanContextServicesSupport.BCSSProxyServiceProvider
public interface BeanContextServiceProvider
One of the primary functions of a BeanContext is to act a as rendezvous between JavaBeans, and BeanContextServiceProviders.
A JavaBean nested within a BeanContext, may ask that BeanContext to provide an instance of a "service", based upon a reference to a Java Class object that represents that service.
If such a service has been registered with the context, or one of its nesting context's, in the case where a context delegate to its context to satisfy a service request, then the BeanContextServiceProvider associated with the service is asked to provide an instance of that service.
The ServiceProvider may always return the same instance, or it may construct a new instance for each request.
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Method Summary
Modifier and TypeMethodDescriptionIterator
<?> getCurrentServiceSelectors
(BeanContextServices bcs, Class<?> serviceClass) Invoked byBeanContextServices
, this method gets the current service selectors for the specified service.getService
(BeanContextServices bcs, Object requestor, Class<?> serviceClass, Object serviceSelector) Invoked byBeanContextServices
, this method requests an instance of a service from thisBeanContextServiceProvider
.void
releaseService
(BeanContextServices bcs, Object requestor, Object service) Invoked byBeanContextServices
, this method releases a nestedBeanContextChild
's (or any arbitrary object associated with aBeanContextChild
) reference to the specified service.
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Method Details
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getService
Object getService(BeanContextServices bcs, Object requestor, Class<?> serviceClass, Object serviceSelector) Invoked byBeanContextServices
, this method requests an instance of a service from thisBeanContextServiceProvider
.- Parameters:
bcs
- TheBeanContextServices
associated with this particular request. This parameter enables theBeanContextServiceProvider
to distinguish service requests from multiple sources.requestor
- The object requesting the serviceserviceClass
- The service requestedserviceSelector
- the service dependent parameter for a particular service, ornull
if not applicable.- Returns:
- a reference to the requested service
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releaseService
Invoked byBeanContextServices
, this method releases a nestedBeanContextChild
's (or any arbitrary object associated with aBeanContextChild
) reference to the specified service.- Parameters:
bcs
- theBeanContextServices
associated with this particular release requestrequestor
- the object requesting the service to be releasedservice
- the service that is to be released
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getCurrentServiceSelectors
Invoked byBeanContextServices
, this method gets the current service selectors for the specified service. A service selector is a service specific parameter, typical examples of which could include: a parameter to a constructor for the service implementation class, a value for a particular service's property, or a key into a map of existing implementations.- Parameters:
bcs
- theBeanContextServices
for this requestserviceClass
- the specified service- Returns:
- the current service selectors for the specified serviceClass
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