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ListDataModel (Java EE 5 SDK) - Java Platform, Enterprise Edition v5.0 API Specifications

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javax.faces.model
Class ListDataModel

java.lang.Object
  javax.faces.model.DataModel
      javax.faces.model.ListDataModel

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public class ListDataModel
extends DataModel

ListDataModel is a convenience implementation of DataModel that wraps an List of Java objects.

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Constructor Summary
ListDataModel()           Construct a new ListDataModel with no specified wrapped data.
ListDataModel(List list)           Construct a new ListDataModel wrapping the specified list.

 

Method Summary
int	getRowCount()           If there is wrappedData available, return the length of the list.
Object	getRowData()           If row data is available, return the array element at the index specified by rowIndex.
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 true if there is wrappedData available, and the current value of rowIndex is greater than or equal to zero, and less than the size of the list.
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, removeDataModelListener

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

ListDataModel

public ListDataModel()

Construct a new ListDataModel with no specified wrapped data.

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ListDataModel

public ListDataModel(List list)

Construct a new ListDataModel wrapping the specified list.

Parameters:

list - List to be wrapped (if any)

Method Detail

isRowAvailable

public boolean isRowAvailable()

Return true if there is wrappedData available, and the current value of rowIndex is greater than or equal to zero, and less than the size of the list. Otherwise, return false.

Specified by:

isRowAvailable in class DataModel

Throws:

FacesException - if an error occurs getting the row availability

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getRowCount

public int getRowCount()

If there is wrappedData available, return the length of the list. If no wrappedData is available, return -1.

Specified by:

getRowCount in class DataModel

Throws:

FacesException - if an error occurs getting the row count

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getRowData

public Object getRowData()

If row data is available, return the array element at the index specified by rowIndex. If no wrapped data is available, return null.

Specified by:

getRowData in class DataModel

Throws:

FacesException - if an error occurs getting the row data

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

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getRowIndex

public int getRowIndex()

Description copied from class: DataModel

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

Throws:

FacesException - if an error occurs getting the row index

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setRowIndex

public void setRowIndex(int rowIndex)

Description copied from class: DataModel

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

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

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getWrappedData

public Object getWrappedData()

Description copied from class: DataModel

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

Specified by:

getWrappedData in class DataModel

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setWrappedData

public void setWrappedData(Object data)

Description copied from class: DataModel

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

Parameters:

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

Throws:

ClassCastException - if data is non-null and is not a List

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