javax.measure.spi

Interface ServiceProvider

public interface ServiceProvider

This class models the component to managing the lifecycle of the Unit and Quantity services.

Author:

Werner Keil

Method Summary

Methods

Modifier and Type	Method and Description
int	getPriority() This method allows to define a priority for a registered ServiceProvider instance.
<T> T	getService(Class<T> serviceType) Access a single service, given its type.
<T> List<T>	getServices(Class<T> serviceType) Access a list of services, given its type.

Method Detail

getPriority

int getPriority()

This method allows to define a priority for a registered ServiceProvider instance. When multiple providers are registered in the system the provider with the highest priority value is taken.

Returns:

the provider's priority (default is 0).

getServices

<T> List<T> getServices(Class<T> serviceType)

Access a list of services, given its type. The bootstrap mechanism should order the instance for precedence, hereby the most significant should be first in order. If no such services are found, an empty list should be returned.

Parameters:

serviceType - the service type.

Returns:

The instance to be used, never null

getService

<T> T getService(Class<T> serviceType)

Access a single service, given its type. The bootstrap mechanism should order the instance for precedence, hereby the most significant should be first in order and returned. If no such services are found, null is returned.

Parameters:

serviceType - the service type.

Returns:

The instance, (with highest precedence) or null, if no such service is available.