net.dpml.lang
Class SimpleServiceRegistry

java.lang.Object
  net.dpml.lang.SimpleServiceRegistry

All Implemented Interfaces:

ServiceRegistry

public class SimpleServiceRegistry
extends Object
implements ServiceRegistry

Simple service registry implementation that selects the first service that is type assignable from the list of service instance supplied to the registry constructor.

Version:

2.0.2

Author:

Digital Product Management Laboratory

Constructor Summary

SimpleServiceRegistry(Object... args)
Creation of a new service registry with no parent.

SimpleServiceRegistry(ServiceRegistry parent, Object... args)
Creation of a new service registry with no parent.

Method Summary

<T> T

lookup(Class<T> type) Matches a service in the registry with the supplied type.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleServiceRegistry

public SimpleServiceRegistry(Object... args)

Creation of a new service registry with no parent.

Parameters:

args - an ordered sequence of thread-safe services

SimpleServiceRegistry

public SimpleServiceRegistry(ServiceRegistry parent,
                             Object... args)

Creation of a new service registry with no parent.

Parameters:

parent - an optional fallback registry

args - an ordered sequence of thread-safe services

Method Detail

lookup

public <T> T lookup(Class<T> type)

Matches a service in the registry with the supplied type. If no match is found and a parent registry has been delclared, the lookup request is passed onto the parent registry, otherwise null is returned.

Specified by:

lookup in interface ServiceRegistry

Parameters:

type - the service type

Returns:

an instance of the type or null if the type could not be resolved