org.ajax4jsf.model
Class ExtendedDataModel

java.lang.Object
  javax.faces.model.DataModel
      org.ajax4jsf.model.ExtendedDataModel

Direct Known Subclasses:

AbstractTreeDataModel, ListShuttleDataModel, MapDataModel, OrderingListDataModel, ScrollableTableDataModel, SequenceDataModel, SequenceDataModel, SerializableDataModel

public abstract class ExtendedDataModel
extends javax.faces.model.DataModel

Extesion for DataModel , for support complex data structure, like tree, spreadsheet etc in iterable components.

Author:

shura

Constructor Summary

ExtendedDataModel()

Method Summary

abstract java.lang.Object	getRowKey()
SerializableDataModel	getSerializableModel(Range range) Iteration component can support save data for use at decoding/validation/update phases to avoid unnessesary calls to original models, for example - to avoid requests to database until all data is validated.
abstract void	setRowKey(java.lang.Object key) Instead of simple int for current state selection, this model can use any object for select current data.
abstract void	walk(javax.faces.context.FacesContext context, DataVisitor visitor, Range range, java.lang.Object argument) Iterate over model by "visitor" pattern, for given range

Methods inherited from class javax.faces.model.DataModel

addDataModelListener, getDataModelListeners, getRowCount, getRowData, getRowIndex, getWrappedData, isRowAvailable, removeDataModelListener, setRowIndex, setWrappedData

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtendedDataModel

public ExtendedDataModel()

Method Detail

setRowKey

public abstract void setRowKey(java.lang.Object key)

Instead of simple int for current state selection, this model can use any object for select current data. Implementation depend on model, with any restrictions :

1. key must be Serializable.
2. Object.toString() method must return representation compatible with UIComponent.getClientId(javax.faces.context.FacesContext), as far as this string will be appended to clientId of iterator component.

Parameters:

key - key for select current data, or null for clear selection.

getRowKey

public abstract java.lang.Object getRowKey()

Returns:

key for selected data or null

getSerializableModel

public SerializableDataModel getSerializableModel(Range range)

Iteration component can support save data for use at decoding/validation/update phases to avoid unnessesary calls to original models, for example - to avoid requests to database until all data is validated.

Returns:

walk

public abstract void walk(javax.faces.context.FacesContext context,
                          DataVisitor visitor,
                          Range range,
                          java.lang.Object argument)
                   throws java.io.IOException

Iterate over model by "visitor" pattern, for given range

Parameters:

context - current JSF context.

visitor - instance of DataVisitor, for process each row.

range - Implementation-specific range of data keys.

argument - Implementation-specific argument

Throws:

java.io.IOException