org.sape.carbon.core.component
Class Lookup

java.lang.Object
  |
  +--org.sape.carbon.core.component.Lookup

public class Lookup

extends Object

This class provides a singleton interface to the component subsystem. This class should be used by any client that needs a reference to a component

Copyright 2002 Sapient

Since:

carbon 1.0

Version:

$Revision: 1.13 $($Author: dvoet $ / $Date: 2003/05/05 21:21:11 $)

Author:

Douglas Voet, January 2002

Field Summary

private ComponentKeeper	componentKeeper Reference to the component keeper.
private static Lookup	INSTANCE Single statically instantiated instance of lookup.

Constructor Summary

private

Lookup() Private constructor to ensure singleton.

Method Summary

Component	fetchComponent(String logicalComponentName) Fetches a reference to a component.
ComponentKeeper	getComponentKeeper() Gets the ComponentKeeper for the system.
static Lookup	getInstance() Static factory method for getting a reference to the singleton Lookup.

Methods inherited from class java.lang.Object

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

Field Detail

componentKeeper

private ComponentKeeper componentKeeper

Reference to the component keeper.

INSTANCE

private static final Lookup INSTANCE

Single statically instantiated instance of lookup.

Constructor Detail

Lookup

private Lookup()

Private constructor to ensure singleton.

Method Detail

fetchComponent

public Component fetchComponent(String logicalComponentName)

Fetches a reference to a component. Delegates to the system's ComponentKeeper. If the ComponentKeeper has not been created yet, it calls the BootStrapper to get it.

Parameters:

logicalComponentName - the name of the component

Returns:

a reference to the component specified by name

getComponentKeeper

public ComponentKeeper getComponentKeeper()

Gets the ComponentKeeper for the system.

Returns:

the ComponentKeeper

getInstance

public static Lookup getInstance()

Static factory method for getting a reference to the singleton Lookup.

Returns:

Lookup