org.apache.wicket.extensions.markup.html.repeater.tree.table

Class TreeDataProvider<T>

java.lang.Object

org.apache.wicket.extensions.markup.html.repeater.tree.table.TreeDataProvider<T>

Type Parameters:

T - node type

All Implemented Interfaces:

Serializable, ITreeDataProvider<T>, IDataProvider<T>, IDetachable, IClusterable

public abstract class TreeDataProvider<T>
extends Object
implements ITreeDataProvider<T>

An adapter of a ITreeProvider to a IDataProvider.

Author:

svenmeier

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	TreeDataProvider(ITreeProvider<T> provider) Construct.

Method Summary

Modifier and Type	Method and Description
void	detach() Detaches model after use.
protected abstract boolean	iterateChildren(T node) Hook method to decide whether the given node's children should be iterated.
Iterator<? extends T>	iterator(long first, long count) Gets an iterator for the subset of total data
NodeModel<T>	model(T object) Wrap the given node in a NodeModel which provides additional branch information needed by TreeColumn.
long	size() Gets total number of items in the collection represented by the DataProvider

Methods inherited from class java.lang.Object

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

Constructor Detail

TreeDataProvider

protected TreeDataProvider(ITreeProvider<T> provider)

Construct.

Parameters:

provider - the provider to adapt

Method Detail

size

public long size()

Description copied from interface: IDataProvider

Gets total number of items in the collection represented by the DataProvider

Specified by:

size in interface IDataProvider<T>

Returns:

total item count

iterator

public Iterator<? extends T> iterator(long first,
                                      long count)

Description copied from interface: IDataProvider

Gets an iterator for the subset of total data

Specified by:

iterator in interface IDataProvider<T>

Parameters:

first - first row of data

count - minimum number of elements to retrieve

Returns:

iterator capable of iterating over {first, first+count} items

iterateChildren

protected abstract boolean iterateChildren(T node)

Hook method to decide whether the given node's children should be iterated.

Parameters:

node - node

Returns:

true if the node's children should be iterated

model

public NodeModel<T> model(T object)

Description copied from interface: ITreeDataProvider

Wrap the given node in a NodeModel which provides additional branch information needed by TreeColumn.

Specified by:

model in interface ITreeDataProvider<T>

Specified by:

model in interface IDataProvider<T>

Parameters:

object - node

Returns:

the model representation of the object

detach

public void detach()

Description copied from interface: IDetachable

Detaches model after use. This is generally used to null out transient references that can be re-attached later.

Specified by:

detach in interface IDataProvider<T>

Specified by:

detach in interface IDetachable