org.rvpf.base.util.container

Class Listeners<L>

Object

Listeners<L>

Type Parameters:

L - The listener type.

All Implemented Interfaces:

Iterable<L>

@ThreadSafe
public final class Listeners<L>
extends Object
implements Iterable<L>

Listeners.

This container is specialized for objects acting as listeners. They are kept in their order of entry. Duplicate additions, recognized by their object identity, will be rejected.

It is assumed that the number of entries will be small and that addition/removal will be infrequent.

Constructor Summary

Constructors

Constructor and Description
Listeners()

Method Summary

Modifier and Type	Method and Description
boolean	add(L listener) Adds a listener if not already contained.
void	clear() Removes all listeners.
boolean	isEmpty() Asks if empty.
Iterator<L>	iterator()
boolean	remove(L listener) Removes a listener.

Methods inherited from class Object

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

Methods inherited from interface Iterable

forEach, spliterator

Constructor Detail

Listeners

public Listeners()

Method Detail

add

public boolean add(@Nonnull
                   L listener)

Adds a listener if not already contained.

Parameters:

listener - The listener.

Returns:

True if added.

clear

public void clear()

Removes all listeners.

isEmpty

@CheckReturnValue
public boolean isEmpty()

Asks if empty.

Returns:

True if empty.

iterator

public Iterator<L> iterator()

Specified by:

iterator in interface Iterable<L>

remove

public boolean remove(@Nonnull
                      L listener)

Removes a listener.

Parameters:

listener - The listener.

Returns:

True if removed.