Interface BeanContextServiceProvider
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- All Known Implementing Classes:
- BeanContextServicesSupport.BCSSProxyServiceProvider
public interface BeanContextServiceProviderOne 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 ServcieProvider may always return the same instance, or it may construct a new instance for each request.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method and Description IteratorgetCurrentServiceSelectors(BeanContextServices bcs, Class serviceClass)Invoked byBeanContextServices, this method gets the current service selectors for the specified service.ObjectgetService(BeanContextServices bcs, Object requestor, Class serviceClass, Object serviceSelector)Invoked byBeanContextServices, this method requests an instance of a service from thisBeanContextServiceProvider.voidreleaseService(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 Detail
getService
Object getService(BeanContextServices bcs, Object requestor, Class serviceClass, Object serviceSelector)
Invoked byBeanContextServices, this method requests an instance of a service from thisBeanContextServiceProvider.- Parameters:
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bcs- TheBeanContextServicesassociated with this particular request. This parameter enables theBeanContextServiceProviderto distinguish service requests from multiple sources. -
requestor- The object requesting the service -
serviceClass- The service requested -
serviceSelector- the service dependent parameter for a particular service, ornullif not applicable. - Returns:
- a reference to the requested service
releaseService
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.- Parameters:
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bcs- theBeanContextServicesassociated with this particular release request -
requestor- the object requesting the service to be released -
service- the service that is to be released
getCurrentServiceSelectors
Iterator getCurrentServiceSelectors(BeanContextServices bcs, Class serviceClass)
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:
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bcs- theBeanContextServicesfor this request -
serviceClass- the specified service - Returns:
- the current service selectors for the specified serviceClass
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