Package overit.geocall.platform.sp

Class Provider<T>

java.lang.Object

overit.geocall.platform.sp.Provider<T>

Type Parameters:

T - the service type

All Implemented Interfaces:

Supplier<T>

public class Provider<T>
extends Object
implements Supplier<T>

Represents a service provider located by ServiceLoader. This allows processing to select or filter on the provider class without instantiating the provider.

Constructor Summary

Constructors

Constructor	Description
Provider(String service, Class<? extends T> type)

Method Summary

Modifier and Type	Method	Description
T	get()	Returns an instance of the provider.
Class<? extends T>	type()	Returns the provider type.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Provider

public Provider(String service,
 Class<? extends T> type)

Method Details

type

public Class<? extends T> type()

Returns the provider type. There is no guarantee that this type is accessible or that it has a public no-args constructor. The get() method should be used to obtain the provider instance.

When a module declares that the provider class is created by a provider factory then this method returns the return type of its public static "provider()" method.

Returns:

The provider type

get

public T get()

Returns an instance of the provider.

Specified by:

get in interface Supplier<T>

Returns:

An instance of the provider.

Throws:

ServiceConfigurationError - If the service provider cannot be instantiated, or in the case of a provider factory, the public static "provider()" method returns null or throws an error or exception. The ServiceConfigurationError will carry an appropriate cause where possible.