org.apache.wicket.extensions.markup.html.repeater.tree
Interface ITreeProvider<T>

Type Parameters:

T - the node type

All Superinterfaces:

org.apache.wicket.util.io.IClusterable, IDetachable, Serializable

All Known Subinterfaces:

ISortableTreeProvider<T,S>

All Known Implementing Classes:

SortableTreeProvider, TreeModelProvider

public interface ITreeProvider<T>
extends IDetachable

Provider of a tree. You can use the IDetachable.detach() method for cleaning up your ITreeProvider instance.

Author:

svenmeier

See Also:

IDetachable, AbstractTree

Method Summary

Iterator<? extends T>	getChildren(T node) Get the children of the given node.
Iterator<? extends T>	getRoots() Get the roots of the tree.
boolean	hasChildren(T node) Does the given object have children - note that this method may return true even if getChildren(Object) returns an empty iterator.
IModel<T>	model(T object) Callback used by the consumer of this tree provider to wrap objects retrieved from getRoots() or getChildren(Object) with a model (usually a detachable one).

Methods inherited from interface org.apache.wicket.model.IDetachable

detach

Method Detail

getRoots

Iterator<? extends T> getRoots()

Get the roots of the tree.

Returns:

roots

hasChildren

boolean hasChildren(T node)

Does the given object have children - note that this method may return true even if getChildren(Object) returns an empty iterator.

Parameters:

node - the node to check for children

Returns:

true if node has children

getChildren

Iterator<? extends T> getChildren(T node)

Get the children of the given node.

Parameters:

node - node to get children for

Returns:

children of node

model

IModel<T> model(T object)

Callback used by the consumer of this tree provider to wrap objects retrieved from getRoots() or getChildren(Object) with a model (usually a detachable one).

Important note: The model must implement Object.equals(Object) and Object.hashCode() !

Parameters:

object - the object that needs to be wrapped

Returns:

the model representation of the object