Package org.eclipse.nebula.widgets.nattable.datachange

Class TemporaryUpdateDataChangeHandler

java.lang.Object

org.eclipse.nebula.widgets.nattable.datachange.AbstractDataChangeHandler<T>

org.eclipse.nebula.widgets.nattable.datachange.UpdateDataChangeHandler<TemporaryUpdateDataChange>

org.eclipse.nebula.widgets.nattable.datachange.TemporaryUpdateDataChangeHandler

All Implemented Interfaces:

ILayerCommandHandler<UpdateDataCommand>, DataChangeHandler, TemporaryDataProvider

public class TemporaryUpdateDataChangeHandler
extends UpdateDataChangeHandler<TemporaryUpdateDataChange>
implements TemporaryDataProvider, ILayerCommandHandler<UpdateDataCommand>

DataChangeHandler to handle UpdateDataCommands for data changes that that should be stored temporarily and not directly performed on the backing data. Creates UpdateDataChanges to track the UpdateDataCommands so they can be executed on the backing data on save.

Since:

1.6

Field Summary

Fields inherited from class org.eclipse.nebula.widgets.nattable.datachange.UpdateDataChangeHandler

changedColumns, changedRows

Fields inherited from class org.eclipse.nebula.widgets.nattable.datachange.AbstractDataChangeHandler

dataChanges, handleDataUpdate, keyHandler, layer

Constructor Summary

Constructors

Constructor	Description
TemporaryUpdateDataChangeHandler(DataChangeLayer layer, CellKeyHandler<?> keyHandler)	Creates an TemporaryUpdateDataChangeHandler to handle DataUpdateEvents to be able to track and revert data changes.

Method Summary

Modifier and Type	Method	Description
boolean	doCommand(ILayer targetLayer, UpdateDataCommand command)
Class<UpdateDataCommand>	getCommandClass()
Object	getDataValueByPosition(int columnPosition, int rowPosition)	Return the temporary data value for the given position.
boolean	tracksDataChange(int columnPosition, int rowPosition)	Checks if this TemporaryDataProvider contains a temporary value for the given position.

Methods inherited from class org.eclipse.nebula.widgets.nattable.datachange.UpdateDataChangeHandler

clearDataChanges, handleColumnDelete, handleColumnInsert, handleStructuralChange, isCellDirty, isColumnDirty, isRowDirty, rebuildPositionCollections, removeChangesForDeletedColumnObjects, removeChangesForDeletedRowObjects, setUpdateOnHorizontalChanges, setUpdateOnVerticalChanges

Methods inherited from class org.eclipse.nebula.widgets.nattable.datachange.AbstractDataChangeHandler

disableTracking, enableTracking, getDataChanges, getKeyHandler

Methods inherited from class java.lang.Object

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

Constructor Detail

TemporaryUpdateDataChangeHandler

public TemporaryUpdateDataChangeHandler(DataChangeLayer layer,
                                        CellKeyHandler<?> keyHandler)

Creates an TemporaryUpdateDataChangeHandler to handle DataUpdateEvents to be able to track and revert data changes.

Parameters:

layer - The DataChangeLayer this handler should be assigned to.

keyHandler - The CellKeyHandler that is used to store data changes for a specific key.

Method Detail

tracksDataChange

public boolean tracksDataChange(int columnPosition,
                                int rowPosition)

Description copied from interface: TemporaryDataProvider

Checks if this TemporaryDataProvider contains a temporary value for the given position.

Specified by:

tracksDataChange in interface TemporaryDataProvider

Parameters:

columnPosition - The column position to check.

rowPosition - The row position to check.

Returns:

true if a temporary data value for the given position exists, false if not.

getDataValueByPosition

public Object getDataValueByPosition(int columnPosition,
                                     int rowPosition)

Description copied from interface: TemporaryDataProvider

Return the temporary data value for the given position.

Specified by:

getDataValueByPosition in interface TemporaryDataProvider

Parameters:

columnPosition - The column position for which the data value should be returned.

rowPosition - The row position for which the data value should be returned.

Returns:

The data value for the given position.

doCommand

public boolean doCommand(ILayer targetLayer,
                         UpdateDataCommand command)

Specified by:

doCommand in interface ILayerCommandHandler<UpdateDataCommand>

Parameters:

targetLayer - the target layer

command - the command

Returns:

true if the command has been handled, false otherwise

getCommandClass

public Class<UpdateDataCommand> getCommandClass()

Specified by:

getCommandClass in interface ILayerCommandHandler<UpdateDataCommand>