net.lecousin.framework.collections

Interface CollectionListener<T>

Type Parameters:

T - type of elements

All Known Implementing Classes:

CollectionListener.Keep

public interface CollectionListener<T>

A collection listener allows to signal the following events: new elements, elements removed, and elements changed.

At initialization, the method elementsReady must be called once to set the collection's initial elements. Then the other methods are used to signal modifications.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	CollectionListener.Keep<T> Keeps a collection of elements, such as listeners can be added asynchronously.

Method Summary

Modifier and Type	Method and Description
void	elementsAdded(Collection<? extends T> elements) Elements have been added.
void	elementsChanged(Collection<? extends T> elements) Elements have changed.
default void	elementsReady(Collection<? extends T> elements) First elements are ready.
void	elementsRemoved(Collection<? extends T> elements) Elements have been removed.
void	error(Throwable error) An error occured while getting elements.

Method Detail

elementsReady

default void elementsReady(Collection<? extends T> elements)

First elements are ready.

elementsAdded

void elementsAdded(Collection<? extends T> elements)

Elements have been added.

elementsRemoved

void elementsRemoved(Collection<? extends T> elements)

Elements have been removed.

elementsChanged

void elementsChanged(Collection<? extends T> elements)

Elements have changed.

error

void error(Throwable error)

An error occured while getting elements.