org.jboss.portal.common.util
Class CopyOnWriteRegistry

java.lang.Object
  org.jboss.portal.common.util.CopyOnWriteRegistry

public class CopyOnWriteRegistry
extends java.lang.Object

Implementation of a registry that implements copy on write semantics.

Version:

$Revision: 7228 $

Author:

Julien Viet

Constructor Summary

CopyOnWriteRegistry()

Method Summary

java.util.Set	getKeys() Return an unmodifiable set containing the keys.
java.lang.Object	getRegistration(java.lang.Object key) Return a registration or null if it does not exist.
java.util.Collection	getRegistrations() Return an unmodifable collection containing the registrations.
boolean	register(java.lang.Object key, java.lang.Object object) Register an object.
java.lang.Object	unregister(java.lang.Object key) Unregister an object.

Methods inherited from class java.lang.Object

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

Constructor Detail

CopyOnWriteRegistry

public CopyOnWriteRegistry()

Method Detail

register

public boolean register(java.lang.Object key,
                        java.lang.Object object)
                 throws java.lang.IllegalArgumentException

Register an object.

Parameters:

key - the registration key

object - the registered object

Returns:

true if the registration was made

Throws:

java.lang.IllegalArgumentException - if the one argument is null

unregister

public java.lang.Object unregister(java.lang.Object key)
                            throws java.lang.IllegalArgumentException

Unregister an object.

Parameters:

key - the registration key

Returns:

true if the unregistration was made

Throws:

java.lang.IllegalArgumentException - if the key is null

getKeys

public java.util.Set getKeys()

Return an unmodifiable set containing the keys.

Returns:

the keys

getRegistrations

public java.util.Collection getRegistrations()

Return an unmodifable collection containing the registrations.

Returns:

the registrations

getRegistration

public java.lang.Object getRegistration(java.lang.Object key)
                                 throws java.lang.IllegalArgumentException

Return a registration or null if it does not exist.

Parameters:

key - the registration key

Returns:

the registeted object

Throws:

java.lang.IllegalArgumentException - if the key is null