org.eclipse.nebula.widgets.nattable.hierarchical

Class HierarchicalSpanningDataProvider

java.lang.Object

org.eclipse.nebula.widgets.nattable.hierarchical.HierarchicalSpanningDataProvider

All Implemented Interfaces:

IDataProvider, ISpanningDataProvider

public class HierarchicalSpanningDataProvider
extends Object
implements ISpanningDataProvider

This implementation of ISpanningDataProvider will span cells if the level objects of the HierarchicalWrapper row objects are actually the same in the same column. With this spanning the hierarchical object graph can be visually represented as the parent objects will be shown in a single spanned cell for all child rows.

It wraps the IRowDataProvider that is used for providing the normalized hierarchical object data to the NatTable.

Since:

1.6

Constructor Summary

Constructors

Constructor and Description
HierarchicalSpanningDataProvider(IRowDataProvider<HierarchicalWrapper> underlyingDataProvider, List<String> propertyNames)
HierarchicalSpanningDataProvider(IRowDataProvider<HierarchicalWrapper> underlyingDataProvider, String... propertyNames)

Method Summary

Modifier and Type	Method and Description
DataCell	getCellByPosition(int columnPosition, int rowPosition)
int	getColumnCount()
Object	getDataValue(int columnIndex, int rowIndex) Gets the value at the given column and row index.
protected Object	getLevelObject(int rowPosition, int level) Returns the level object for the specified level out of the HierarchicalWrapper object at the given row position.
int	getRowCount()
protected int	getRowSpan(int rowPosition, int level) Calculates the number of rows to span regarding the data of the cells.
protected int	getStartRowPosition(int rowPosition, int level) Checks if the row above the given row position contains the same value.
void	setDataValue(int columnIndex, int rowIndex, Object newValue) Sets the value at the given column and row index.
protected boolean	valuesEqual(Object value1, Object value2) Check if the given values are equal, where two null values are not considered to be equal.

Methods inherited from class java.lang.Object

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

Constructor Detail

HierarchicalSpanningDataProvider

public HierarchicalSpanningDataProvider(IRowDataProvider<HierarchicalWrapper> underlyingDataProvider,
                                        String... propertyNames)

Parameters:

underlyingDataProvider - The IRowDataProvider that should be wrapped by this HierarchicalSpanningDataProvider. Needed to access the level object via the row object to determine if spanning should be applied.

propertyNames - The property names that are used to access the data. Needed to determine the level object inside the HierarchicalWrapper.

HierarchicalSpanningDataProvider

public HierarchicalSpanningDataProvider(IRowDataProvider<HierarchicalWrapper> underlyingDataProvider,
                                        List<String> propertyNames)

Parameters:

underlyingDataProvider - The IRowDataProvider that should be wrapped by this HierarchicalSpanningDataProvider. Needed to access the level object via the row object to determine if spanning should be applied.

propertyNames - The property names that are used to access the data. Needed to determine the level object inside the HierarchicalWrapper.

Method Detail

getDataValue

public Object getDataValue(int columnIndex,
                           int rowIndex)

Description copied from interface: IDataProvider

Gets the value at the given column and row index.

Specified by:

getDataValue in interface IDataProvider

Parameters:

columnIndex - The column index of the cell whose value is requested.

rowIndex - The row index of the cell whose value is requested.

Returns:

The data value associated with the specified cell coordintates.

setDataValue

public void setDataValue(int columnIndex,
                         int rowIndex,
                         Object newValue)

Description copied from interface: IDataProvider

Sets the value at the given column and row index. Optional operation. Should throw UnsupportedOperationException if this operation is not supported.

Specified by:

setDataValue in interface IDataProvider

Parameters:

columnIndex - The column index of the cell whose value should be changed.

rowIndex - The row index of the cell whose value should be changed.

newValue - The new value that should be set.

getColumnCount

public int getColumnCount()

Specified by:

getColumnCount in interface IDataProvider

Returns:

The number of columns this IDataProvider handles.

getRowCount

public int getRowCount()

Specified by:

getRowCount in interface IDataProvider

Returns:

The number of rows this IDataProvider handles.

getCellByPosition

public DataCell getCellByPosition(int columnPosition,
                                  int rowPosition)

Specified by:

getCellByPosition in interface ISpanningDataProvider

getStartRowPosition

protected int getStartRowPosition(int rowPosition,
                                  int level)

Checks if the row above the given row position contains the same value. In this case the given row is spanned with the above and therefore the above row position will be returned here.

Parameters:

rowPosition - The row position whose spanning state should be checked.

level - The hierarchy level of the object to check.

Returns:

The row position where the spanning starts or the given row position if it is not spanned with rows above.

getRowSpan

protected int getRowSpan(int rowPosition,
                         int level)

Calculates the number of rows to span regarding the data of the cells.

Parameters:

rowPosition - The row position to start the check for spanning.

level - The hierarchy level to check.

Returns:

The number of rows to span.

getLevelObject

protected Object getLevelObject(int rowPosition,
                                int level)

Returns the level object for the specified level out of the HierarchicalWrapper object at the given row position.

Parameters:

rowPosition - The row position of the object for which the level object is requested.

level - The hierarchy level to get the object for.

Returns:

The level object for the specified level out of the HierarchicalWrapper object at the given row position.

valuesEqual

protected boolean valuesEqual(Object value1,
                              Object value2)

Check if the given values are equal, where two null values are not considered to be equal.

Parameters:

value1 - The first value to check for equality with the second value

value2 - The second value to check for equality with the first value.

Returns:

true if the given values are equal.