org.apache.wicket.markup.repeater.data
Class EmptyDataProvider

java.lang.Object
  org.apache.wicket.markup.repeater.data.EmptyDataProvider

All Implemented Interfaces:

java.io.Serializable, IClusterable, IDataProvider, IDetachable

public class EmptyDataProvider
extends java.lang.Object
implements IDataProvider

A convenience class to represent an empty data provider.

Author:

Phil Kulak

See Also:

Serialized Form

Constructor Summary

EmptyDataProvider()

Method Summary

void	detach() Detaches model after use.
static EmptyDataProvider	getInstance()
java.util.Iterator	iterator(int first, int count) Gets an iterator for the subset of total data
IModel	model(java.lang.Object object) Callback used by the consumer of this data provider to wrap objects retrieved from IDataProvider.iterator(int, int) with a model (usually a detachable one).
int	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

EmptyDataProvider

public EmptyDataProvider()

Method Detail

getInstance

public static EmptyDataProvider getInstance()

Returns:

the singleton instance of this class

iterator

public java.util.Iterator iterator(int first,
                                   int count)

Description copied from interface: IDataProvider

Gets an iterator for the subset of total data

Specified by:

iterator in interface IDataProvider

Parameters:

first - first row of data

count - minimum number of elements to retrieve

Returns:

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

See Also:

IDataProvider.iterator(int, int)

size

public int size()

Description copied from interface: IDataProvider

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

Specified by:

size in interface IDataProvider

Returns:

total item count

See Also:

IDataProvider.size()

model

public IModel model(java.lang.Object object)

Description copied from interface: IDataProvider

Callback used by the consumer of this data provider to wrap objects retrieved from IDataProvider.iterator(int, int) with a model (usually a detachable one).

Specified by:

model in interface IDataProvider

Parameters:

object - the object that needs to be wrapped

Returns:

the model representation of the object

See Also:

IDataProvider.model(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 IDetachable

See Also:

IDetachable.detach()