aim4.util
Class WeakRefRegistry<T>

java.lang.Object
  aim4.util.WeakRefRegistry<T>

All Implemented Interfaces:

Registry<T>

public class WeakRefRegistry<T>
extends Object
implements Registry<T>

A registry based on weak references.

Constructor Summary

WeakRefRegistry()
Create a weak reference registry.

WeakRefRegistry(int initId)
Create a weak reference registry.

Method Summary

T	get(int id) Retrieve an object from the registry.
int	getNewId() Get a new unused ID.
boolean	isIdExist(int id) Whether or not an object is in the registry.
int	register(T obj) Register an object.
void	set(int id, T obj) Associate an object to a given ID.
void	setNull(int id) Remove the object associated with a given ID from the registry.

Methods inherited from class java.lang.Object

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

Constructor Detail

WeakRefRegistry

public WeakRefRegistry()

Create a weak reference registry.

WeakRefRegistry

public WeakRefRegistry(int initId)

Create a weak reference registry.

Parameters:

initId - the initial ID

Method Detail

register

public int register(T obj)

Description copied from interface: Registry

Register an object.

Specified by:

register in interface Registry<T>

Parameters:

obj - the object

Returns:

the ID of the object

isIdExist

public boolean isIdExist(int id)

Description copied from interface: Registry

Whether or not an object is in the registry.

Specified by:

isIdExist in interface Registry<T>

Parameters:

id - the ID of the object

Returns:

Whether or not an object is in the registry

get

public T get(int id)

Description copied from interface: Registry

Retrieve an object from the registry.

Specified by:

get in interface Registry<T>

Parameters:

id - the ID of the object

Returns:

the object

getNewId

public int getNewId()

Description copied from interface: Registry

Get a new unused ID.

Specified by:

getNewId in interface Registry<T>

Returns:

a new unused ID

set

public void set(int id,
                T obj)

Description copied from interface: Registry

Associate an object to a given ID.

Specified by:

set in interface Registry<T>

Parameters:

id - the ID

obj - the object

setNull

public void setNull(int id)

Description copied from interface: Registry

Remove the object associated with a given ID from the registry.

Specified by:

setNull in interface Registry<T>

Parameters:

id - the ID