ej.service.loader

Class CompositeServiceLoader

java.lang.Object

ej.service.loader.SimpleServiceLoader

ej.service.loader.CompositeServiceLoader

All Implemented Interfaces:

ServiceLoader

Direct Known Subclasses:

ServiceLoaderKF

public class CompositeServiceLoader
extends SimpleServiceLoader

A composite service loader contains a list a service loaders. It searches the requested services in its children sequentially respecting the order they are added.

Field Summary

Fields inherited from class ej.service.loader.SimpleServiceLoader

services

Constructor Summary

Constructors

Constructor and Description
CompositeServiceLoader() Creates a new empty composite service loader.

Method Summary

Modifier and Type	Method and Description
void	addServiceLoader(ServiceLoader serviceLoader) Adds a service loader at the end of the list a service loaders used by this composite service loader.
<T> T	getService(Class<T> service) Gets the instance of the given service.

Methods inherited from class ej.service.loader.SimpleServiceLoader

checkServicePermission, createAlternativeImplementation, putService

Methods inherited from class java.lang.Object

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

Constructor Detail

CompositeServiceLoader

public CompositeServiceLoader()

Creates a new empty composite service loader.

Method Detail

addServiceLoader

public void addServiceLoader(ServiceLoader serviceLoader)

Adds a service loader at the end of the list a service loaders used by this composite service loader.

Parameters:

serviceLoader - the service loader to add.

Throws:

NullPointerException - if the given service loader is null.

getService

@Nullable
public <T> T getService(Class<T> service)

Description copied from interface: ServiceLoader

Gets the instance of the given service.

If there is already an instance in cache, it is returned otherwise a new one is created.

May return null if the service is not defined.

Specified by:

getService in interface ServiceLoader

Overrides:

getService in class SimpleServiceLoader

Type Parameters:

T - the service type.

Parameters:

service - the service.

Returns:

the instance of the given service.