javax.faces.model

Class IterableDataModel<E>

java.lang.Object

javax.faces.model.DataModel<E>

javax.faces.model.IterableDataModel<E>

All Implemented Interfaces:

Iterable<E>

public class IterableDataModel<E>
extends DataModel<E>

IterableDataModel is an implementation of DataModel that wraps an Iterable.

This can be used to encapsulate nearly every collection type, including Collection derived types such as List and Set. As such this specific DataModel can be used instead of more specific DataModels like ListDataModel and CollectionDataModel.

Constructor Summary

Constructors

Constructor and Description
IterableDataModel() Construct a new IterableDataModel with no specified wrapped data.
IterableDataModel(Iterable<E> iterable) Construct a new IterableDataModel wrapping the specified iterable.

Method Summary

Modifier and Type	Method and Description
int	getRowCount() Return the number of rows of data objects represented by this DataModel.
E	getRowData() Return an object representing the data for the currenty selected row index.
int	getRowIndex() Return the zero-relative index of the currently selected row.
Object	getWrappedData() Return the object representing the data wrapped by this DataModel, if any.
boolean	isRowAvailable() Return a flag indicating whether there is rowData available at the current rowIndex.
void	setRowIndex(int rowIndex) Set the zero-relative index of the currently selected row, or -1 to indicate that we are not positioned on a row.
void	setWrappedData(Object data) Set the object representing the data collection wrapped by this DataModel.

Methods inherited from class javax.faces.model.DataModel

addDataModelListener, getDataModelListeners, iterator, removeDataModelListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

IterableDataModel

public IterableDataModel()

Construct a new IterableDataModel with no specified wrapped data.

IterableDataModel

public IterableDataModel(Iterable<E> iterable)

Construct a new IterableDataModel wrapping the specified iterable.

Parameters:

iterable - Iterable to be wrapped.

Method Detail

isRowAvailable

public boolean isRowAvailable()

Return a flag indicating whether there is rowData available at the current rowIndex. If no wrappedData is available, return false.

Specified by:

isRowAvailable in class DataModel<E>

Returns:

true if and only if there is data available at the current index, false otherwise.

Throws:

FacesException - if an error occurs getting the row availability

getRowCount

public int getRowCount()

Return the number of rows of data objects represented by this DataModel. If the number of rows is unknown, or no wrappedData is available, return -1.

Specified by:

getRowCount in class DataModel<E>

Returns:

the number of rows of data represented by this DataModel

Throws:

FacesException - if an error occurs getting the row count

getRowData

public E getRowData()

Return an object representing the data for the currenty selected row index. If no wrappedData is available, return null.

Specified by:

getRowData in class DataModel<E>

Returns:

an object representing the data for the currently selected row index

Throws:

FacesException - if an error occurs getting the row data

IllegalArgumentException - if now row data is available at the currently specified row index

getRowIndex

public int getRowIndex()

Return the zero-relative index of the currently selected row. If we are not currently positioned on a row, or no wrappedData is available, return -1.

Specified by:

getRowIndex in class DataModel<E>

Returns:

the index of the currently selected row

Throws:

FacesException - if an error occurs getting the row index

setRowIndex

public void setRowIndex(int rowIndex)

Set the zero-relative index of the currently selected row, or -1 to indicate that we are not positioned on a row. It is possible to set the row index at a value for which the underlying data collection does not contain any row data. Therefore, callers may use the isRowAvailable() method to detect whether row data will be available for use by the getRowData() method.

If there is no wrappedData available when this method is called, the specified rowIndex is stored (and may be retrieved by a subsequent call to getRowData()), but no event is sent. Otherwise, if the currently selected row index is changed by this call, a DataModelEvent will be sent to the rowSelected() method of all registered DataModelListeners.

Specified by:

setRowIndex in class DataModel<E>

Parameters:

rowIndex - The new zero-relative index (must be non-negative)

Throws:

FacesException - if an error occurs setting the row index

IllegalArgumentException - if rowIndex is less than -1

getWrappedData

public Object getWrappedData()

Return the object representing the data wrapped by this DataModel, if any.

Specified by:

getWrappedData in class DataModel<E>

Returns:

the Object that this model wraps.

setWrappedData

public void setWrappedData(Object data)

Set the object representing the data collection wrapped by this DataModel. If the specified data is null, detach this DataModel from any previously wrapped data collection instead.

If data is non-null, the currently selected row index must be set to zero, and a DataModelEvent must be sent to the rowSelected() method of all registered DataModelListeners indicating that this row is now selected.

Specified by:

setWrappedData in class DataModel<E>

Parameters:

data - Data collection to be wrapped, or null to detach from any previous data collection

Throws:

ClassCastException - if data is not of the appropriate type for this DataModel implementation